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1553 lines
884 KiB
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1553 lines
884 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="G02B" definition-exists="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>OPTICAL ELEMENTS, SYSTEMS OR APPARATUS</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Attention is drawn to the Notes following the titles of class <class-ref scheme="cpc">B81</class-ref> and subclass <class-ref scheme="cpc">B81B</class-ref> relating to "microstructural devices" and "microstructural systems". </note-paragraph><note-paragraph>This subclass <u>does not cover</u>:<subnote type="bullet"><note-paragraph>devices or arrangements, the optical operation of which is modified by changing the optical properties of the medium of the devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light, frequency-changing, non-linear optics, optical logic elements;</note-paragraph><note-paragraph>optical analogue/digital converters​;</note-paragraph></subnote>which are covered by subclass <class-ref scheme="cpc">G02F</class-ref>.</note-paragraph></note><note type="warning"><note-paragraph warning-type="ipc-not-used">The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups:<table><row><entry><class-ref scheme="ipc">G02B11/00</class-ref> – <class-ref scheme="ipc">G02B11/34</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">G02B9/00</class-ref> and <class-ref scheme="cpc">G02B13/00</class-ref></entry></row></table></note-paragraph><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="G02B1/00" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B1/00" definition-exists="true" ipc-concordant="G02B1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B1/00</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Optical elements characterised by the material of which they are made</text></title-part><title-part><text>Optical coatings for optical elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B1/002" definition-exists="false" ipc-concordant="G02B1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>made of materials engineered to provide properties not available in nature, e.g. metamaterials</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B1/005" definition-exists="false" ipc-concordant="G02B1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>made of photonic crystals or photonic band gap materials </text><reference><text>photonic band-gap structures or photonic lattices in integrated optics <class-ref scheme="cpc">G02B6/1225</class-ref>; photonic band-gap structures or photonic lattices in optical fibres <class-ref scheme="cpc">G02B6/02295</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B1/007" definition-exists="false" ipc-concordant="G02B1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>made of negative effective refractive index materials</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B1/02" definition-exists="false" ipc-concordant="G02B1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>made of crystals, e.g. rock-salt, semi-conductors </text><reference><text><class-ref scheme="cpc">G02B1/08</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B1/04" definition-exists="false" ipc-concordant="G02B1/04" c-set-base-allowed="true" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>made of organic materials, e.g. plastics </text><reference><text><class-ref scheme="cpc">G02B1/08</class-ref> takes precedence</text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> In this group the use of specific polymers is indicated using the relevant subdivision of <class-ref scheme="cpc">C08L</class-ref> preceded by a plus sign </note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B1/041" definition-exists="false" ipc-concordant="G02B1/04" c-set-base-allowed="true" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lenses</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B1/043" definition-exists="false" ipc-concordant="G02B1/04" c-set-base-allowed="true" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Contact lenses</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B1/045" definition-exists="false" ipc-concordant="G02B1/04" c-set-base-allowed="true" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light guides</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B1/046" definition-exists="false" ipc-concordant="G02B1/04" c-set-base-allowed="true" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the core material</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B1/048" definition-exists="false" ipc-concordant="G02B1/04" c-set-base-allowed="true" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the cladding material</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B1/06" definition-exists="false" ipc-concordant="G02B1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>made of fluids in transparent cells</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B1/08" definition-exists="false" ipc-concordant="G02B1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>made of polarising materials</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B1/10" definition-exists="true" ipc-concordant="G02B1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>G02B1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical coatings produced by application to, or surface treatment of, optical elements </text><reference><text><class-ref scheme="cpc">G02B1/08</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B1/11" definition-exists="false" ipc-concordant="G02B1/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B1/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anti-reflection coatings</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B1/111" definition-exists="false" ipc-concordant="G02B1/111" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G02B1/111</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using layers comprising organic materials</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B1/113" definition-exists="false" ipc-concordant="G02B1/113" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G02B1/113</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using inorganic layer materials only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B1/115" definition-exists="false" ipc-concordant="G02B1/115" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>G02B1/115</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multilayers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B1/116" definition-exists="false" ipc-concordant="G02B1/116" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>G02B1/116</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>including electrically conducting layers</text></title-part></class-title><notes-and-warnings><note type="note"><note-paragraph>When <CPC-specific-note>the arrangement of</CPC-specific-note> electrically conducting layers also exhibit an anti-static effect, classification is also made in group <class-ref scheme="cpc">G02B1/16</class-ref></note-paragraph></note></notes-and-warnings></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B1/118" definition-exists="true" ipc-concordant="G02B1/118" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>G02B1/118</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B1/12" definition-exists="true" ipc-concordant="G02B1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>G02B1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by surface treatment, e.g. by irradiation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B1/14" definition-exists="false" ipc-concordant="G02B1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G02B1/14</classification-symbol><class-title><title-part><text>Protective coatings, e.g. hard coatings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B1/16" definition-exists="false" ipc-concordant="G02B1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G02B1/16</classification-symbol><class-title><title-part><text>having an anti-static effect, e.g. electrically conducting coatings</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B1/18" definition-exists="false" ipc-concordant="G02B1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G02B1/18</classification-symbol><class-title><title-part><text>Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films </text><reference><text><class-ref scheme="cpc">G02B1/16</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B3/00" definition-exists="true" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B3/00</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Simple or compound lenses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B3/0006" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/0006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrays </text><reference><text><class-ref scheme="cpc">G02B3/02</class-ref>, <class-ref scheme="cpc">G02B5/188</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B3/0012" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/0012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the manufacturing method</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B3/0018" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reflow, i.e. characterized by the step of melting microstructures to form curved surfaces, e.g. manufacturing of moulds and surfaces for transfer etching</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B3/0025" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Machining, e.g. grinding, polishing, diamond turning, manufacturing of mould parts</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B3/0031" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/0031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Replication or moulding, e.g. hot embossing, UV-casting, injection moulding</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B3/0037" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/0037</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterized by the distribution or form of lenses</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B3/0043" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/0043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inhomogeneous or irregular arrays, e.g. varying shape, size, height</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B3/005" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged along a single direction only, e.g. lenticular sheets </text><reference><text><class-ref scheme="cpc">G02B3/0043</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B3/0056" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/0056</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses </text><reference><text><class-ref scheme="cpc">G02B3/0043</class-ref> takes precedence; miniaturised objectives for electronic devices employing wafer level optics <class-ref scheme="cpc">G02B13/0085</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B3/0062" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/0062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B3/0068" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B3/0068</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements </text><reference><text><class-ref scheme="cpc">G02B5/1885</class-ref>, <class-ref scheme="cpc">G02B17/002</class-ref>, <class-ref scheme="cpc">G02B30/27</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B3/0075" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterized by non-optical structures, e.g. having integrated holding or alignment means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B3/0081" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having one or more elements with analytic function to create variable power </text><reference><text>variable magnification in general <class-ref scheme="cpc">G02B15/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B3/0087" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/0087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with index gradient</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B3/0093" definition-exists="false" ipc-concordant="G02B3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2003/0093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the shape</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B3/02" definition-exists="false" ipc-concordant="G02B3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with non-spherical faces </text><reference><text><class-ref scheme="cpc">G02B3/10</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B3/04" definition-exists="false" ipc-concordant="G02B3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B3/04</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>with continuous faces that are rotationally symmetrical but deviate from a true sphere </text><CPC-specific-text><text>, e.g. so called "aspheric" lenses</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B3/06" definition-exists="false" ipc-concordant="G02B3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with cylindrical or toric faces</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B3/08" definition-exists="false" ipc-concordant="G02B3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with discontinuous faces, e.g. Fresnel lens </text><CPC-specific-text><reference><text>diffractive Fresnel lenses <class-ref scheme="cpc">G02B5/1876</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B3/10" definition-exists="false" ipc-concordant="G02B3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bifocal lenses</text></title-part><title-part><text>Multifocal lenses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B3/12" definition-exists="false" ipc-concordant="G02B3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fluid-filled or evacuated lenses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B3/14" definition-exists="false" ipc-concordant="G02B3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of variable focal length</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B5/00" definition-exists="true" ipc-concordant="G02B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical elements other than lenses </text><reference><text>light guides <class-ref scheme="cpc">G02B6/00</class-ref>; optical logic elements <class-ref scheme="cpc">G02F3/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B5/001" definition-exists="false" ipc-concordant="G02B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Axicons, waxicons, reflaxicons</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B5/003" definition-exists="false" ipc-concordant="G02B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light absorbing elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B5/005" definition-exists="false" ipc-concordant="G02B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diaphragms </text><reference><text>for cameras <class-ref scheme="cpc">G03B9/02</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/006" definition-exists="false" ipc-concordant="G02B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>cooled</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B5/008" definition-exists="false" ipc-concordant="G02B5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Surface plasmon devices </text><reference><text>diffractive gratings with a pitch less than or comparable to the wavelength <class-ref scheme="cpc">G02B5/1809</class-ref>; surface plasmons in integrated optics <class-ref scheme="cpc">G02B6/1226</class-ref>; optical analysis of materials by means of surface plasmons <class-ref scheme="cpc">G01N21/553</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B5/02" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diffusing elements</text></title-part><title-part><text>Afocal elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/0205" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the diffusing properties</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/021" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B5/021</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/0215" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the surface having a regular structure</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/0221" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0221</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the surface having an irregular structure </text><reference><text><class-ref scheme="cpc">G02B5/0226</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/0226" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having particles on the surface</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/0231" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B5/0231</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>the surface having microprismatic or micropyramidal shape </text><reference><text>macroscopic prism arrays <class-ref scheme="cpc">G02B5/045</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/0236" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the diffusion taking place within the volume of the element</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/0242" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of dispersed particles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/0247" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of voids or pores</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/0252" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using holographic or diffractive means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/0257" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>creating an anisotropic diffusion characteristic, i.e. distributing output differently in two perpendicular axes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/0263" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G02B5/0263</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>with positional variation of the diffusing properties, e.g. gradient or patterned diffuser</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/0268" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterized by the fabrication or manufacturing method</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/0273" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterized by the use</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/0278" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used in transmission</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/0284" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used in reflection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/0289" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0289</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used as a transflector</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/0294" definition-exists="false" ipc-concordant="G02B5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G02B5/0294</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>adapted to provide an additional optical effect, e.g. anti-reflection or filter</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B5/04" definition-exists="true" ipc-concordant="G02B5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Prisms</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/045" definition-exists="false" ipc-concordant="G02B5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Prism arrays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/06" definition-exists="false" ipc-concordant="G02B5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fluid-filled or evacuated prisms</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B5/08" definition-exists="true" ipc-concordant="G02B5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mirrors </text><CPC-specific-text><reference><text>vehicle mirrors involving special optical features <class-ref scheme="cpc">B60R1/08</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/0808" definition-exists="false" ipc-concordant="G02B5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a single reflecting layer </text><reference><text><class-ref scheme="cpc">G02B5/0883</class-ref>, <class-ref scheme="cpc">G02B5/0891</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/0816" definition-exists="false" ipc-concordant="G02B5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multilayer mirrors, i.e. having two or more reflecting layers </text><reference><text><class-ref scheme="cpc">G02B5/0883</class-ref>, <class-ref scheme="cpc">G02B5/0891</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/0825" definition-exists="false" ipc-concordant="G02B5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the reflecting layers comprising dielectric materials only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/0833" definition-exists="false" ipc-concordant="G02B5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0833</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising inorganic materials only</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/0841" definition-exists="false" ipc-concordant="G02B5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0841</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising organic materials, e.g. polymers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/085" definition-exists="false" ipc-concordant="G02B5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at least one of the reflecting layers comprising metal</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/0858" definition-exists="false" ipc-concordant="G02B5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0858</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the reflecting layers comprising a single metallic layer with one or more dielectric layers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B5/0866" definition-exists="false" ipc-concordant="G02B5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>incorporating one or more organic, e.g. polymeric layers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/0875" definition-exists="false" ipc-concordant="G02B5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0875</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the reflecting layers comprising two or more metallic layers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/0883" definition-exists="false" ipc-concordant="G02B5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0883</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a refractive index gradient </text><reference><text>rugate filters <class-ref scheme="cpc">G02B5/289</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/0891" definition-exists="false" ipc-concordant="G02B5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/0891</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ultraviolet [UV] mirrors </text><reference><text>apparatus for microlithography exposure <class-ref scheme="cpc">G03F7/70</class-ref>; X-ray multilayer structures <class-ref scheme="cpc">G21K1/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/09" definition-exists="false" ipc-concordant="G02B5/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multifaceted or polygonal mirrors </text><CPC-specific-text><text>, e.g. polygonal scanning mirrors; Fresnel mirrors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/10" definition-exists="false" ipc-concordant="G02B5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with curved faces</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B5/12" definition-exists="false" ipc-concordant="G02B5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reflex reflectors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/122" definition-exists="false" ipc-concordant="G02B5/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>cube corner, trihedral or triple reflector type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/124" definition-exists="false" ipc-concordant="G02B5/124" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/124</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>plural reflecting elements forming part of a unitary plate or sheet</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/126" definition-exists="false" ipc-concordant="G02B5/126" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>including curved refracting surface</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/128" definition-exists="false" ipc-concordant="G02B5/128" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/128</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>transparent spheres being embedded in matrix</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/13" definition-exists="false" ipc-concordant="G02B5/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>plural curved refracting elements forming part of a unitary body</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/132" definition-exists="false" ipc-concordant="G02B5/132" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/132</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with individual reflector mounting means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/134" definition-exists="false" ipc-concordant="G02B5/134" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/134</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>including a threaded mounting member</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/136" definition-exists="false" ipc-concordant="G02B5/136" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/136</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>plural reflecting elements forming part of a unitary body </text><reference><text><class-ref scheme="cpc">G02B5/124</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B5/18" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G02B5/18</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Diffraction gratings </text><CPC-specific-text><reference><text>holographic optical elements <class-ref scheme="cpc">G02B5/32</class-ref>, <class-ref scheme="cpc">G03H</class-ref>; integrally combined with optical fibres <class-ref scheme="cpc">G02B6/02057</class-ref>; for coupling light guides <class-ref scheme="cpc">G02B6/34</class-ref>; integrally combined with optical integrated light guides <class-ref scheme="cpc">G02B6/12</class-ref>; grating systems <class-ref scheme="cpc">G02B27/44</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02B5/1804" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2005/1804</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission gratings</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/1809" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1809</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with pitch less than or comparable to the wavelength</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/1814" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1814</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings </text><reference><text><class-ref scheme="cpc">G02B5/189</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/1819" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1819</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plural gratings positioned on the same surface, e.g. array of gratings </text><reference><text>plural diffractive elements positioned sequentially along the optical path <class-ref scheme="cpc">G02B27/4272</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/1823" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1823</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in an overlapping or superposed manner</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/1828" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1828</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having means for producing variable diffraction </text><reference><text>controlling the direction of light by means of one or more diffracting elements <class-ref scheme="cpc">G02B26/0808</class-ref>; acousto-optical elements <class-ref scheme="cpc">G02F1/11</class-ref>, <class-ref scheme="cpc">G02F1/33</class-ref>; electro- or magneto-optical diffraction <class-ref scheme="cpc">G02F1/292</class-ref>, <class-ref scheme="cpc">G02F1/2955</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/1833" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1833</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising birefringent materials </text><reference><text>birefringent elements <u>per se</u> <class-ref scheme="cpc">G02B5/3083</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/1838" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1838</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with ultraviolet radiation or X-rays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/1842" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1842</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gratings for image generation </text><reference><text><class-ref scheme="cpc">G02B5/1847</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/1847" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1847</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing methods</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/1852" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1852</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical means, e.g. ruling with diamond tool, moulding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/1857" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B5/1857</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>using exposure or etching means, e.g. holography, photolithography, exposure to electron or ion beams</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/1861" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1861</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reflection gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials </text><reference><text><class-ref scheme="cpc">G02B5/1809</class-ref>, <class-ref scheme="cpc">G02B5/1828</class-ref>, <class-ref scheme="cpc">G02B5/1833</class-ref>, <class-ref scheme="cpc">G02B5/1838</class-ref> and <class-ref scheme="cpc">G02B5/1847</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/1866" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials </text><reference><text><class-ref scheme="cpc">G02B5/1809</class-ref>, <class-ref scheme="cpc">G02B5/1828</class-ref>, <class-ref scheme="cpc">G02B5/1833</class-ref>, <class-ref scheme="cpc">G02B5/1838</class-ref> and <class-ref scheme="cpc">G02B5/1847</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/1871" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1871</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmissive phase gratings</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/1876" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1876</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffractive Fresnel lenses; Zone plates; Kinoforms </text><reference><text><class-ref scheme="cpc">G02B5/1842</class-ref>, <class-ref scheme="cpc">G02B5/1847</class-ref> take precedence; optical systems having diffractive correction means <class-ref scheme="cpc">G02B27/0037</class-ref>; Fresnel lenses operating by refraction <class-ref scheme="cpc">G02B3/08</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/188" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/188</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plurality of such optical elements formed in or on a supporting substrate</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/1885" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1885</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arranged as a periodic array</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/189" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/189</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structurally combined with optical elements not having diffractive power</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/1895" definition-exists="false" ipc-concordant="G02B5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/1895</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>such optical elements having dioptric power</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B5/20" definition-exists="true" ipc-concordant="G02B5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B5/20</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Filters </text><reference><text>polarising elements <class-ref scheme="cpc">G02B5/30</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/201" definition-exists="false" ipc-concordant="G02B5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/201</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in the form of arrays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/202" definition-exists="false" ipc-concordant="G02B5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a gas or vapour</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/203" definition-exists="false" ipc-concordant="G02B5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/203</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having holographic or diffractive elements </text><reference><text>diffraction gratings <u>per se</u> <class-ref scheme="cpc">G02B5/18</class-ref>; holographic elements <u>per se</u> <class-ref scheme="cpc">G02B5/32</class-ref>; generating the spectrum using diffraction elements <class-ref scheme="cpc">G01J3/18</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/204" definition-exists="true" ipc-concordant="G02B5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/204</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which spectral selection is performed by means of a conductive grid or array, e.g. frequency selective surfaces </text><reference><text>for use with wavelengths longer than the infra-red light <class-ref scheme="cpc">H01Q15/0006</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/205" definition-exists="false" ipc-concordant="G02B5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Neutral density filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/206" definition-exists="false" ipc-concordant="G02B5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising particles embedded in a solid matrix</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/207" definition-exists="false" ipc-concordant="G02B5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/207</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising semiconducting materials</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/208" definition-exists="false" ipc-concordant="G02B5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with infra-red or ultraviolet radiation, e.g. for separating visible light from infra-red and/or ultraviolet radiation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/22" definition-exists="false" ipc-concordant="G02B5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G02B5/22</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Absorbing filters </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02B5/201</class-ref> - <class-ref scheme="cpc">G02B5/208</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/223" definition-exists="false" ipc-concordant="G02B5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/223</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing organic substances, e.g. dyes, inks or pigments</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/226" definition-exists="false" ipc-concordant="G02B5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Glass filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/23" definition-exists="false" ipc-concordant="G02B5/23" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/23</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Photochromic filters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/24" definition-exists="false" ipc-concordant="G02B5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquid filters </text><reference><text><class-ref scheme="cpc">G02B5/23</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/26" definition-exists="false" ipc-concordant="G02B5/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reflecting filters </text><reference><text><class-ref scheme="cpc">G02B5/28</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/265" definition-exists="false" ipc-concordant="G02B5/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving total internal reflection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/28" definition-exists="true" ipc-concordant="G02B5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Interference filters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/281" definition-exists="false" ipc-concordant="G02B5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/281</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>designed for the infra-red light</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/282" definition-exists="false" ipc-concordant="G02B5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>reflecting for infra-red and transparent for visible light, e.g. heat reflectors, laser protection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/283" definition-exists="false" ipc-concordant="G02B5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>designed for the ultraviolet</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/284" definition-exists="false" ipc-concordant="G02B5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of etalon type comprising a resonant cavity other than a thin solid film, e.g. gas, air, solid plates </text><reference><text>etalons for fibre optic multiplexing <class-ref scheme="cpc">G02B6/29358</class-ref>; etalons for spectral measurement <class-ref scheme="cpc">G01J3/26</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/285" definition-exists="false" ipc-concordant="G02B5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G02B5/285</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>comprising deposited thin solid films </text><reference><text><class-ref scheme="cpc">G02B5/281</class-ref> - <class-ref scheme="cpc">G02B5/289</class-ref> take precedence; multilayered film filters for fibre optic multiplexing <class-ref scheme="cpc">G02B6/29361</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/286" definition-exists="false" ipc-concordant="G02B5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-02-01" status="published"><classification-symbol>G02B5/286</classification-symbol><class-title date-revised="2019-02-01"><title-part><CPC-specific-text><text>having four or fewer layers, e.g. for achieving a colour effect</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/287" definition-exists="false" ipc-concordant="G02B5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/287</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising at least one layer of organic material</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/288" definition-exists="false" ipc-concordant="G02B5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising at least one thin film resonant cavity, e.g. in bandpass filters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/289" definition-exists="false" ipc-concordant="G02B5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/289</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rugate filters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B5/30" definition-exists="false" ipc-concordant="G02B5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B5/30</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Polarising elements </text><reference><text>light-modulating devices with active elements <class-ref scheme="cpc">G02F1/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/3008" definition-exists="false" ipc-concordant="G02B5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/3008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising dielectric particles, e.g. birefringent crystals embedded in a matrix</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/3016" definition-exists="false" ipc-concordant="G02B5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/3016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving passive liquid crystal elements </text><reference><text>optical properties of liquid crystals <class-ref scheme="cpc">G02F1/0063</class-ref>; polarising elements associated with active liquid crystal devices <class-ref scheme="cpc">G02F1/133528</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/3025" definition-exists="false" ipc-concordant="G02B5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/3025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state </text><reference><text><class-ref scheme="cpc">G02B5/3008</class-ref>, <class-ref scheme="cpc">G02B5/3016</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/3033" definition-exists="false" ipc-concordant="G02B5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/3033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in the form of a thin sheet or foil, e.g. Polaroid</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B5/3041" definition-exists="false" ipc-concordant="G02B5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/3041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising multiple thin layers, e.g. multilayer stacks</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B5/305" definition-exists="false" ipc-concordant="G02B5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including organic materials, e.g. polymeric layers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/3058" definition-exists="false" ipc-concordant="G02B5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/3058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising electrically conductive elements, e.g. wire grids, conductive particles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/3066" definition-exists="false" ipc-concordant="G02B5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/3066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving the reflection of light at a particular angle of incidence, e.g. Brewster's angle</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/3075" definition-exists="false" ipc-concordant="G02B5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/3075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use in the UV </text><reference><text><class-ref scheme="cpc">G02B5/3066</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B5/3083" definition-exists="false" ipc-concordant="G02B5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/3083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Birefringent or phase retarding elements </text><reference><text><class-ref scheme="cpc">G02B5/3008</class-ref>, <class-ref scheme="cpc">G02B5/3016</class-ref> take precedence; systems for polarisation control <class-ref scheme="cpc">G02B27/286</class-ref>; manufacturing phase modulating patterns by lithographic processes <class-ref scheme="cpc">G03F7/001</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B5/3091" definition-exists="false" ipc-concordant="G02B5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B5/3091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use in the UV</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B5/32" definition-exists="true" ipc-concordant="G02B5/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B5/32</classification-symbol><class-title date-revised="2016-11-01"><title-part><text>Holograms used as optical elements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B6/00" definition-exists="true" ipc-concordant="G02B6/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Light guides</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B6/0001" definition-exists="true" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G02B6/0001</classification-symbol><class-title date-revised="2018-01-01"><title-part><CPC-specific-text><text>specially adapted for lighting devices or systems </text><reference><text>lighting or signalling on vehicles using light guides <class-ref scheme="cpc">B60Q1/00</class-ref>; lighting devices for vehicle dashboards <class-ref scheme="cpc">B60Q3/10</class-ref>; lighting devices for vehicle interior using light guides <class-ref scheme="cpc">B60Q3/62</class-ref>; lighting devices mounted on the vehicle rear part using light guides <class-ref scheme="cpc">F21S43/235</class-ref>; measuring arrangements having light conducting pointers <class-ref scheme="cpc">G01D13/265</class-ref>; illumination of liquid crystal displays <class-ref scheme="cpc">G02F1/1336</class-ref>; illuminated signs <class-ref scheme="cpc">G09F13/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/0003" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the light guides being doped with fluorescent agents</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/0005" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the light guides being of the fibre type </text><reference><text><class-ref scheme="cpc">G02B6/0003</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0006" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coupling light into the fibre </text><reference><text>in general <class-ref scheme="cpc">G02B6/4298</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0008" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the light being emitted at the end of the fibre</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/001" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the light being emitted along at least a portion of the lateral surface of the fibre</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/0011" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0011</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the light guides being planar or of plate-like form</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0013" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for improving the coupling-in of light from the light source into the light guide </text><reference><text>coupling light into light guides in general <class-ref scheme="cpc">G02B6/42</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0015" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided on the surface of the light guide or in the bulk of it</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0016" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grooves, prisms, gratings, scattering particles or rough surfaces</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0018" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Redirecting means on the surface of the light guide</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/002" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/0021" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for housing at least a part of the light source, e.g. by forming holes or recesses</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0023" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0025" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffusing sheet or layer; Prismatic sheet or layer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0026" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wavelength selective element, sheet or layer, e.g. filter or grating</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0028" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light guide, e.g. taper</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/003" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lens or lenticular sheet or layer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0031" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reflecting element, sheet or layer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0033" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for improving the coupling-out of light from the light guide</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0035" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided on the surface of the light guide or in the bulk of it</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0036" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>2-D arrangement of prisms, protrusions, indentations or roughened surfaces</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0038" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/004" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B6/004</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/0041" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided in the bulk of the light guide</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/0043" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided on the surface of the light guide</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0045" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by shaping at least a portion of the light guide</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/0046" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tapered light guide, e.g. wedge-shaped light guide</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/0048" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with stepwise taper</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/005" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided by one optical element, or plurality thereof, placed on the light output side of the light guide</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0051" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0051</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffusing sheet or layer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0053" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Prismatic sheet or layer; Brightness enhancement element, sheet or layer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0055" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reflecting element, sheet or layer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0056" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0056</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0058" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>varying in density, size, shape or depth along the light guide</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/006" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to produce indicia, symbols, texts or the like</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0061" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>to provide homogeneous light output intensity</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0063" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for extracting light out both the major surfaces of the light guide</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0065" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing aspects; Material aspects</text></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> When classifying in this group, classification must also be made in one or more of the groups of <class-ref scheme="cpc">G02B6/0013</class-ref> or <class-ref scheme="cpc">G02B6/0033</class-ref> for the related device aspects </note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0066" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the light source being coupled to the light guide</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0068" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements of plural sources, e.g. multi-colour light sources</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/007" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Incandescent lamp or gas discharge lamp</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0071" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with elongated shape, e.g. tube</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0073" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light emitting diode [LED]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0075" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements of multiple light guides </text><reference><text><class-ref scheme="cpc">G02B6/0028</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0076" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stacked arrangements of multiple light guides of the same or different cross-sectional area</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0078" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Side-by-side arrangements, e.g. for large area displays</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/008" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the partially overlapping type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0081" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0083" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of electrical connections of light sources to drivers, circuit boards, or the like</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0085" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for removing heat created by the light source from the package </text><reference><text>heat extraction or cooling elements for semiconductor light sources in general <class-ref scheme="cpc">H01L33/64</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0086" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Positioning aspects</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0088" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the light guide or other optical sheets in the package</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/009" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the light source in the package </text><reference><text><class-ref scheme="cpc">G02B6/0021</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0091" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0091</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the light source relative to the light guide </text><reference><text><class-ref scheme="cpc">G02B6/0021</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0093" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for protecting the light guide</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0095" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/0096" definition-exists="false" ipc-concordant="F21V8/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0096</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the lights guides being of the hollow type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B6/0098" definition-exists="false" ipc-concordant="G02B6/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2006/0098</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for scanning</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B6/02" definition-exists="true" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B6/02</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Optical fibres with cladding</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/02004" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the core effective area or mode field radius</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/02009" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Large effective area or mode field radius, e.g. to reduce nonlinear effects in single mode fibres</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02014" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Effective area greater than 60 square microns in the C band, i.e. 1530-1565 nm</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02019" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Effective area greater than 90 square microns in the C band, i.e. 1530-1565 nm</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02023" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Based on higher order modes, i.e. propagating modes other than the LP01 or HE11 fundamental mode </text><reference><text>mode converters <class-ref scheme="cpc">G02B6/14</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/02028" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Small effective area or mode field radius, e.g. for allowing nonlinear effects </text><reference><text>non-linear optical waveguide devices <class-ref scheme="cpc">G02F1/365</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/02033" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Core or cladding made from organic material, e.g. polymeric material </text><reference><text><class-ref scheme="cpc">G02B1/04</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/02038" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with core or cladding having graded refractive index</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/02042" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multicore optical fibres</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/02047" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dual mode fibre </text><reference><text><class-ref scheme="cpc">G02B6/105</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/02052" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising optical elements other than gratings, e.g. filters </text><reference><text>comprising gratings <class-ref scheme="cpc">G02B6/02057</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/02057" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising gratings</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/02061" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grating external to the fibre and in contact with the fibre, e.g. evanescently coupled, gratings applied to the fibre end </text><reference><text>mechanically induced in the fibre <class-ref scheme="cpc">G02B6/02071</class-ref>, surface relief on the fibre <class-ref scheme="cpc">G02B6/02066</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/02066" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gratings having a surface relief structure, e.g. repetitive variation in diameter of core or cladding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/02071" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanically induced gratings, e.g. having microbends </text><reference><text><class-ref scheme="cpc">G02B6/02066</class-ref> takes precedence; mode converters <class-ref scheme="cpc">G02B6/14</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/02076" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Refractive index modulation gratings, e.g. Bragg gratings</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0208" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by their structure, wavelength response </text><reference><text><class-ref scheme="cpc">G02B6/02114</class-ref>, <class-ref scheme="cpc">G02B6/02171</class-ref>, <class-ref scheme="cpc">G02B6/02195</class-ref> take precedence; multiple layer cores or claddings <class-ref scheme="cpc">G02B6/036</class-ref>, protective coverings <class-ref scheme="cpc">G02B6/4429</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02085" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the grating profile, e.g. chirped, apodised, tilted, helical</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G02B6/0209" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2006/0209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Helical, chiral gratings</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/02095" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Long period gratings, i.e. transmission gratings coupling light between core and cladding modes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/021" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the core or cladding or coating, e.g. materials, radial refractive index profiles, cladding shape</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/02104" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02104</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the coating external to the cladding, e.g. coating influences grating properties</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/02109" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02109</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having polarization sensitive features, e.g. reduced photo-induced birefringence</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02114" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02114</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by enhanced photosensitivity characteristics of the fibre, e.g. hydrogen loading, heat treatment </text><reference><text>treatment of glass fibres by ion diffusion, implantation, radiation, <class-ref scheme="cpc">C03C25/60</class-ref>, <class-ref scheme="cpc">C03C25/62</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02119" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02119</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Photosensitivity profiles determining the grating structure, e.g. radial or longitudinal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02123" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the method of manufacture of the grating </text><reference><text>photolithography <class-ref scheme="cpc">G03F7/0005</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02128" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02128</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Internal inscription, i.e. grating written by light propagating within the fibre, e.g. "self-induced"</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02133" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02133</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using beam interference</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/02138" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02138</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on illuminating a phase mask</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02142" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02142</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on illuminating or irradiating an amplitude mask, i.e. a mask having a repetitive intensity modulating pattern</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02147" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02147</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Point by point fabrication, i.e. grating elements induced one step at a time along the fibre, e.g. by scanning a laser beam, arc discharge scanning </text><reference><text><class-ref scheme="cpc">G02B6/02133</class-ref> and <class-ref scheme="cpc">G02B6/02142</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02152" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02152</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving moving the fibre or a manufacturing element, stretching of the fibre </text><reference><text><class-ref scheme="cpc">G02B6/02147</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02B6/02157" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2006/02157</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grating written during drawing of the fibre</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02B6/02161" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2006/02161</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grating written by radiation passing through the protective fibre coating</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02B6/02166" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2006/02166</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methods of designing the gratings, i.e. calculating the structure, e.g. algorithms, numerical methods</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02171" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02171</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by means for compensating environmentally induced changes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02176" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02176</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>due to temperature fluctuations</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/0218" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0218</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mounting means, e.g. by using a combination of materials having different thermal expansion coefficients</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/02185" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on treating the fibre, e.g. post-manufacture treatment, thermal aging, annealing </text><reference><text>annealing glass fibres <class-ref scheme="cpc">C03B37/15</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/0219" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0219</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on composition of fibre materials</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02195" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02195</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by means for tuning the grating</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/022" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical stress, e.g. tuning by compression or elongation, special geometrical shapes such as "dog-bone" or taper </text><reference><text><class-ref scheme="cpc">G02B6/02204</class-ref> takes precedence; optical modulation using photo-elastic effect <class-ref scheme="cpc">G02F1/0131</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02204" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02204</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using thermal effects, e.g. heating or cooling of a temperature sensitive mounting body </text><reference><text>optical modulation using thermo-optic effect <class-ref scheme="cpc">G02F1/0147</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02209" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting means, e.g. adhesives, casings </text><reference><text><class-ref scheme="cpc">G02B6/02171</class-ref> and <class-ref scheme="cpc">G02B6/02195</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/02214" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02214</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>tailored to obtain the desired dispersion, e.g. dispersion shifted, dispersion flattened</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/02219" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02219</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Characterised by the wavelength dispersion properties in the silica low loss window around 1550 nm, i.e. S, C, L and U bands from 1460-1675 nm</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02223" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02223</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dual window fibres, i.e. characterised by dispersion properties around 1550 nm and in at least another wavelength window, e.g. 1310 nm</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02228" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dispersion flattened fibres, i.e. having a low dispersion variation over an extended wavelength range</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02233" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02233</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having at least two dispersion zero wavelengths</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02238" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02238</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Low dispersion slope fibres</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/02242" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a dispersion slope <0.06 ps/km/nm2</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02247" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dispersion varying along the longitudinal direction, e.g. dispersion managed fibre</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02252" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Negative dispersion fibres at 1550 nm</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02257" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Non-zero dispersion shifted fibres, i.e. having a small negative dispersion at 1550 nm, e.g. ITU-T G.655 dispersion between - 1.0 to - 10 ps/nm.km for avoiding nonlinear effects</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02261" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dispersion compensating fibres, i.e. for compensating positive dispersion of other fibres</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02266" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Positive dispersion fibres at 1550 nm</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02271" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02271</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Non-zero dispersion shifted fibres, i.e. having a small positive dispersion at 1550 nm, e.g. ITU-T G.655 dispersion between 1.0 to 10 ps/nm.km for avoiding nonlinear effects</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02276" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02276</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dispersion shifted fibres, i.e. zero dispersion at 1550 nm</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0228" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Characterised by the wavelength dispersion slope properties around 1550 nm </text><reference><text><class-ref scheme="cpc">G02B6/02228</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/02285" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Characterised by the polarisation mode dispersion [PMD] properties, e.g. for minimising PMD </text><reference><text>fabrication methods for minimising PMD <class-ref scheme="cpc">C03B37/02745</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/0229" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0229</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by nanostructures, i.e. structures of size less than 100 nm, e.g. quantum dots</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/02295" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02295</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Microstructured optical fibre </text><reference><text>polarisation properties thereof <class-ref scheme="cpc">G02B6/105</class-ref> and <class-ref scheme="cpc">G02B6/024</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/023" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having different index layers arranged around the core for guiding light by reflection, i.e. 1D crystal, e.g. omniguide</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02304" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02304</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Core having lower refractive index than cladding, e.g. air filled, hollow core</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/02309" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02309</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structures extending perpendicularly or at a large angle to the longitudinal axis of the fibre, e.g. photonic band gap along fibre axis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/02314" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02314</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plurality of longitudinal structures extending along optical fibre axis, e.g. holes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02319" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02319</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by core or core-cladding interface features</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02323" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02323</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Core having lower refractive index than cladding, e.g. photonic band gap guiding</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/02328" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02328</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hollow or gas filled core</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02333" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02333</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Core having higher refractive index than cladding, e.g. solid core, effective index guiding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02338" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02338</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structured core, e.g. core contains more than one material, non-constant refractive index distribution in core, asymmetric or non-circular elements in core unit, multiple cores, insertions between core and clad</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02342" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02342</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by cladding features, i.e. light confining region</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02347" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02347</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Longitudinal structures arranged to form a regular periodic lattice, e.g. triangular, square, honeycomb unit cell repeated throughout cladding</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/02352" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02352</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Complex periodic lattices or multiple interpenetrating periodic lattices, e.g. unit cell having more than two materials, partially internally coated holes, for multiple bandgaps</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02357" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02357</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Property of longitudinal structures or background material varies radially and/or azimuthally in the cladding, e.g. size, spacing, periodicity, shape, refractive index, graded index, quasiperiodic, quasicrystals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02361" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02361</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Longitudinal structures forming multiple layers around the core, e.g. arranged in multiple rings with each ring having longitudinal elements at substantially the same radial distance from the core, having rotational symmetry about the fibre axis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02366" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02366</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Single ring of structures, e.g. "air clad"</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02371" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02371</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cross section of longitudinal structures is non-circular</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/02376" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02376</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Longitudinal variation along fibre axis direction, e.g. tapered holes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0238" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0238</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Longitudinal structures having higher refractive index than background material, e.g. high index solid rods</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/02385" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02385</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comprising liquid, e.g. fluid filled holes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0239" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0239</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comprising means for varying the guiding properties, e.g. tuning means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/02395" definition-exists="false" ipc-concordant="G02B6/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/02395</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture </text><reference><text><class-ref scheme="cpc">G02B6/02052</class-ref>, <class-ref scheme="cpc">G02B6/02057</class-ref>, <class-ref scheme="cpc">G02B6/105</class-ref>, <class-ref scheme="cpc">G02B6/024</class-ref>, <class-ref scheme="cpc">G02B6/032</class-ref>, <class-ref scheme="cpc">G02B6/14</class-ref> take precedence; optical cables, i.e. comprising protective structures external to the protective coating such as a jacket or plural coated optical fibres <class-ref scheme="cpc">G02B6/44</class-ref>; coating on fibre gratings <class-ref scheme="cpc">G02B6/02104</class-ref>; coating of glass to obtain optical fibres <class-ref scheme="cpc">C03C25/104</class-ref>; multilayer core or cladding <class-ref scheme="cpc">G02B6/036</class-ref>; reinforcing splice joints <class-ref scheme="cpc">G02B6/2558</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/024" definition-exists="false" ipc-concordant="G02B6/024" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with polarisation maintaining properties</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/028" definition-exists="false" ipc-concordant="G02B6/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with core or cladding having graded refractive index </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02B6/02033</class-ref>, <class-ref scheme="cpc">G02B6/02295</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0281" definition-exists="false" ipc-concordant="G02B6/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0281</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Graded index region forming part of the central core segment, e.g. alpha profile, triangular, trapezoidal core </text><reference><text><class-ref scheme="cpc">G02B6/0288</class-ref>, <class-ref scheme="cpc">G02B6/0286</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0283" definition-exists="false" ipc-concordant="G02B6/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Graded index region external to the central core segment, e.g. sloping layer or triangular or trapezoidal layer </text><reference><text><class-ref scheme="cpc">G02B6/0288</class-ref>, <class-ref scheme="cpc">G02B6/0286</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/0285" definition-exists="false" ipc-concordant="G02B6/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Graded index layer adjacent to the central core segment and ending at the outer cladding index</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0286" definition-exists="false" ipc-concordant="G02B6/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of graded index in the central core segment and a graded index layer external to the central core segment </text><reference><text><class-ref scheme="cpc">G02B6/0288</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/0288" definition-exists="false" ipc-concordant="G02B6/028" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multimode fibre, e.g. graded index core for compensating modal dispersion</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/032" definition-exists="false" ipc-concordant="G02B6/032" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/032</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with non solid core or cladding </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02B6/02295</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B6/0325" definition-exists="false" ipc-concordant="G02B6/032" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2006/0325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fluid core or cladding</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/036" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/036</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>core or cladding comprising multiple layers </text><CPC-specific-text><reference><text>multicore optical fibres <class-ref scheme="cpc">G02B6/02042</class-ref>; microstructured properties <class-ref scheme="cpc">G02B6/02295</class-ref>; omniguide fibres <class-ref scheme="cpc">G02B6/023</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/03605" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Highest refractive index not on central axis</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/03611" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03611</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Highest index adjacent to central axis region, e.g. annular core, coaxial ring, centreline depression affecting waveguiding</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/03616" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03616</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference</text></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>A layer is characterised by an abrupt change in refractive index gradient, e.g. by the layer having a maximum or minimum or the layer being between two points of inflexion, such that a graded boundary as in a trapezoidal core is not counted as a separate layer. 2. The innermost high index core layer is the first layer starting from the central core after which the refractive index decreases. 3. + and - refer respectively to the relative refractive index difference increase/decrease of adjacent layers starting from the innermost highest index core layer and continuing in a radially outward direction</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/03622" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03622</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having 2 layers only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/03627" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03627</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged - +</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/03633" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03633</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged - -</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/03638" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03638</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having 3 layers only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/03644" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03644</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged - + -</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/0365" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/0365</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged - - +</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/03655" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03655</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged - + +</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/03661" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03661</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having 4 layers only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/03666" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03666</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged - + - +</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/03672" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03672</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged - - + -</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/03677" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03677</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged - + + -</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/03683" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03683</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arranged - - + +</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/03688" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03688</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having 5 or more layers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/03694" definition-exists="false" ipc-concordant="G02B6/036" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/03694</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple layers differing in properties other than the refractive index, e.g. attenuation, diffusion, stress properties</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B6/04" definition-exists="false" ipc-concordant="G02B6/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>formed by bundles of fibres </text><reference><text><class-ref scheme="cpc">G02B6/24</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/06" definition-exists="false" ipc-concordant="G02B6/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the relative position of the fibres being the same at both ends, e.g. for transporting images</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/065" definition-exists="false" ipc-concordant="G02B6/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with dynamic image improvement</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/08" definition-exists="false" ipc-concordant="G02B6/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with fibre bundle in form of plate</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B6/10" definition-exists="true" ipc-concordant="G02B6/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B6/10</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>of the optical waveguide type </text><reference><text><class-ref scheme="cpc">G02B6/02</class-ref>, <class-ref scheme="cpc">G02B6/24</class-ref> take precedence; devices or arrangements for the control of light by electric, magnetic, electro-magnetic or acoustic means <class-ref scheme="cpc">G02F1/00</class-ref>; transferring the modulation of modulated light <class-ref scheme="cpc">G02F2/00</class-ref>; optical logic elements <class-ref scheme="cpc">G02F3/00</class-ref>; optical analogue/digital converters <class-ref scheme="cpc">G02F7/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/102" definition-exists="false" ipc-concordant="G02B6/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for infra-red and ultra-violet radiation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/105" definition-exists="false" ipc-concordant="G02B6/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having optical polarisation effects</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/107" definition-exists="false" ipc-concordant="G02B6/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Subwavelength-diameter waveguides, e.g. nanowires</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/12" definition-exists="true" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B6/12</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>of the integrated circuit kind </text><reference><text>electric integrated circuits <class-ref scheme="cpc">H01L27/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/12002" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Three-dimensional structures</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/12004" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combinations of two or more optical elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/12007" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>forming wavelength selective elements, e.g. multiplexer, demultiplexer</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/12009" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/12011" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12011</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the arrayed waveguides, e.g. comprising a filled groove in the array section</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/12014" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the wavefront splitting or combining section, e.g. grooves or optical elements in a slab waveguide</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/12016" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the input or output waveguides, e.g. tapered waveguide ends, coupled together pairs of output waveguides</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/12019" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the optical interconnection to or from the AWG devices, e.g. integration or coupling with lasers or photodiodes </text><reference><text>coupling integrated waveguide to fibre <class-ref scheme="cpc">G02B6/30</class-ref>, to optoelectronic element <class-ref scheme="cpc">G02B6/42</class-ref>; monolithic integration of integrated waveguides with other optical elements <class-ref scheme="cpc">G02B6/12004</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/12021" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comprising cascaded AWG devices; AWG multipass configuration; Plural AWG devices integrated on a single chip</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/12023" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by means for reducing the polarisation dependence, e.g. reduced birefringence</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/12026" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by means for reducing the temperature dependence</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/12028" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on a combination of materials having a different refractive index temperature dependence, i.e. the materials are used for transmitting light</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/1203" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/1203</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mounting means, e.g. by using a combination of materials having different thermal expansion coefficients</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/12033" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/12033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by means for configuring the device, e.g. moveable element for wavelength tuning </text><reference><text>switching <class-ref scheme="cpc">G02B6/35</class-ref>; thermo-optic devices <class-ref scheme="cpc">G02F1/0147</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B6/12035" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Materials</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12038" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B2006/12038</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Glass (SiO<sub>2</sub> based materials)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/1204" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B2006/1204</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Lithium niobate (LiNbO<sub>3</sub>)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12042" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B2006/12042</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Potassium niobate (KNbO<sub>3</sub>)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12045" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lithium tantalate (LiTaO<sub>3</sub>)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12047" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Barium titanate (BaTiO<sub>3</sub>)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/1205" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/1205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arsenic sulfide (As<sub>2</sub>S<sub>3</sub>)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12052" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arsenic selenide (As<sub>2</sub>Se<sub>3</sub>)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12054" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B2006/12054</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Tantalum pentoxide (Ta<sub>2</sub>O<sub>5</sub>)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12057" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B2006/12057</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Niobium pentoxide (Nb<sub>2</sub>O<sub>5</sub>)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12059" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B2006/12059</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Titanium niobate (TiNbPO<sub>3</sub>)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12061" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Silicon</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12064" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Zinc sulfide (ZnS)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12066" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Calcite (CaCO<sub>3</sub>)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12069" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Organic material</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02B6/12071" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>PMMA</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02B6/12073" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Epoxy</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02B6/12076" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polyamide</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12078" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gallium arsenide or alloys (GaAs, GaAlAs, GaAsP, GaInAs)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/1208" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/1208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rare earths</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B6/12083" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional arrangements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12085" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integrated</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12088" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Monomode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/1209" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/1209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multimode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12092" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stepped</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12095" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Graded</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12097" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12097</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ridge, rib or the like</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/121" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Channel; buried or the like</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12102" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lens</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12104" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12104</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mirror; Reflectors or the like</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12107" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grating</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12109" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12109</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filter</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12111" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12111</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fibre</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12114" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12114</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Prism</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12116" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12116</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polariser; Birefringent</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12119" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12119</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bend</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12121" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12121</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Laser</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12123" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12126" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light absorber</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12128" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12128</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple Quantum Well [MQW]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/1213" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/1213</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising photonic band-gap structures or photonic lattices</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B6/12133" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12133</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Functions</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12135" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12135</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Temperature control</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12138" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12138</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sensor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/1214" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/1214</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Soliton</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12142" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12142</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modulator</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12145" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switch</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12147" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12147</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coupler</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/1215" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/1215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Splitter</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12152" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12152</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mode converter</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12154" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12154</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Power divider</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12157" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12157</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Isolator</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12159" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12159</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interferometer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12161" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12161</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distributed feedback [DFB]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12164" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12164</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiplexing; Demultiplexing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B6/12166" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12166</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing methods</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12169" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12169</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Annealing</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02B6/12171" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12171</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a laser beam</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12173" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12173</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Masking</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12176" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12176</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Etching</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12178" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12178</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Epitaxial growth</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/1218" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/1218</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffusion</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12183" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ion-exchange</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02B6/12185" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>field-assisted ion-exchange</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12188" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12188</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ion implantation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/1219" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/1219</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polymerisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12192" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12192</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Splicing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12195" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12195</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tapering</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/12197" definition-exists="false" ipc-concordant="G02B6/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-09-01" status="published"><classification-symbol>G02B2006/12197</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grinding; Polishing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/122" definition-exists="false" ipc-concordant="G02B6/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B6/122</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Basic optical elements, e.g. light-guiding paths</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/1221" definition-exists="false" ipc-concordant="G02B6/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/1221</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>made from organic materials</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/1223" definition-exists="false" ipc-concordant="G02B6/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/1223</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>high refractive index type, i.e. high-contrast waveguides</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/1225" definition-exists="false" ipc-concordant="G02B6/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/1225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising photonic band-gap structures or photonic lattices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/1226" definition-exists="false" ipc-concordant="G02B6/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/1226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving surface plasmon interaction</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/1228" definition-exists="false" ipc-concordant="G02B6/122" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/1228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tapered waveguides, e.g. integrated spot-size transformers </text><reference><text>for coupling with fibres <class-ref scheme="cpc">G02B6/305</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/124" definition-exists="false" ipc-concordant="G02B6/124" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/124</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Geodesic lenses or integrated gratings</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/1245" definition-exists="false" ipc-concordant="G02B6/124" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/1245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Geodesic lenses</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/125" definition-exists="false" ipc-concordant="G02B6/125" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bends, branchings or intersections</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/126" definition-exists="false" ipc-concordant="G02B6/126" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using polarisation effects </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02B6/1226</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/13" definition-exists="false" ipc-concordant="G02B6/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integrated optical circuits characterised by the manufacturing method</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/131" definition-exists="false" ipc-concordant="G02B6/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B6/131</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>by using epitaxial growth </text><reference><text>epitaxial growth for semiconductors <class-ref scheme="cpc">H01L21/02365</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/132" definition-exists="false" ipc-concordant="G02B6/132" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/132</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by deposition of thin films</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/134" definition-exists="false" ipc-concordant="G02B6/134" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/134</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by substitution by dopant atoms</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/1342" definition-exists="false" ipc-concordant="G02B6/134" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/1342</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using diffusion </text><reference><text>diffusion in single crystals <class-ref scheme="cpc">C30B31/00</class-ref>; diffusion in glass <class-ref scheme="cpc">C03C23/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/1345" definition-exists="false" ipc-concordant="G02B6/134" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/1345</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using ion exchange </text><reference><text>ion exchange in glass <class-ref scheme="cpc">C03C21/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/1347" definition-exists="false" ipc-concordant="G02B6/134" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/1347</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using ion implantation </text><reference><text>ion implantation in glass <class-ref scheme="cpc">C03C23/0055</class-ref>; ion implantation in general <class-ref scheme="cpc">C23C</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/136" definition-exists="false" ipc-concordant="G02B6/136" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/136</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by etching</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/138" definition-exists="false" ipc-concordant="G02B6/138" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/138</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by using polymerisation</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/14" definition-exists="false" ipc-concordant="G02B6/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mode converters</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B6/24" definition-exists="true" ipc-concordant="G02B6/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B6/24</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Coupling light guides</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/241" definition-exists="false" ipc-concordant="G02B6/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/241</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light guide terminations</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/243" definition-exists="false" ipc-concordant="G02B6/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/243</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as light absorbers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/245" definition-exists="false" ipc-concordant="G02B6/245" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Removing protective coverings of light guides before coupling</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/25" definition-exists="false" ipc-concordant="G02B6/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Preparing the ends of light guides for coupling, e.g. cutting</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/255" definition-exists="false" ipc-concordant="G02B6/255" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/255</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Splicing of light guides, e.g. by fusion or bonding</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/2551" definition-exists="true" ipc-concordant="G02B6/255" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G02B6/2551</classification-symbol><class-title date-revised="2020-08-01"><title-part><CPC-specific-text><text>using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/2552" definition-exists="false" ipc-concordant="G02B6/255" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2552</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>reshaping or reforming of light guides for coupling using thermal heating, e.g. tapering, forming of a lens on light guide ends</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/2553" definition-exists="false" ipc-concordant="G02B6/255" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2553</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Splicing machines, e.g. optical fibre fusion splicer</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/2555" definition-exists="false" ipc-concordant="G02B6/255" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2555</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Alignment or adjustment devices for aligning prior to splicing</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/2556" definition-exists="false" ipc-concordant="G02B6/255" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2556</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including a fibre supporting member inclined to the bottom surface of the alignment means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/2557" definition-exists="false" ipc-concordant="G02B6/255" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2557</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using deformable flexure members, flexible hinges or pivotal arms</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/2558" definition-exists="false" ipc-concordant="G02B6/255" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2558</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reinforcement of splice joint</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/26" definition-exists="true" ipc-concordant="G02B6/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical coupling means </text><reference><text><class-ref scheme="cpc">G02B6/36</class-ref>, <class-ref scheme="cpc">G02B6/42</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/262" definition-exists="false" ipc-concordant="G02B6/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/262</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/264" definition-exists="false" ipc-concordant="G02B6/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/264</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with optical elements between opposed fibre ends which perform a function other than beam splitting </text><reference><text>having lens focusing means <class-ref scheme="cpc">G02B6/32</class-ref>; utilising prism or grating <class-ref scheme="cpc">G02B6/34</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/266" definition-exists="false" ipc-concordant="G02B6/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the optical element being an attenuator</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/268" definition-exists="false" ipc-concordant="G02B6/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>G02B6/268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for modal dispersion control, e.g. concatenation of light guides having different modal dispersion properties </text><reference><text>graded index multimode fibres <class-ref scheme="cpc">G02B6/0288</class-ref>; multimodal transmission systems <class-ref scheme="cpc">H04B10/2581</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/27" definition-exists="true" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B6/27</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>with polarisation selective and adjusting means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/2706" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2706</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2713" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2713</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>cascade of polarisation selective or adjusting operations</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/272" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising polarisation means for beam splitting and combining</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/2726" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2726</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in or on light guides, e.g. polarisation means assembled in a light guide</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2733" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2733</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light guides evanescently coupled to polarisation sensitive elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/274" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/274</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on light guide birefringence, e.g. due to coupling between light guides </text><reference><text><class-ref scheme="cpc">G02B6/105</class-ref>, <class-ref scheme="cpc">G02B6/024</class-ref> take precedence; mechanically induced birefringence <class-ref scheme="cpc">G02F1/0134</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/2746" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2746</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising non-reciprocal devices, e.g. isolators, FRM, circulators, quasi-isolators </text><reference><text>magneto-optic non-reciprocal devices <class-ref scheme="cpc">G02F1/093</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/2753" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2753</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by their function or use, i.e. of the complete device</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/276" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/276</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Removing selected polarisation component of light, i.e. polarizers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2766" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2766</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manipulating the plane of polarisation from one input polarisation to another output polarisation, e.g. polarisation rotators, linear to circular polarisation converters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2773" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2773</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polarisation splitting or combining</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/278" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling polarisation mode dispersion [PMD], e.g. PMD compensation or emulation </text><reference><text>PMD minimised transmission systems <class-ref scheme="cpc">H04B10/2569</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2786" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2786</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reducing the polarisation degree, i.e. depolarisers, scramblers, unpolarised output</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2793" definition-exists="false" ipc-concordant="G02B6/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2793</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling polarisation dependent loss, e.g. polarisation insensitivity, reducing the change in polarisation degree of the output light even if the input polarisation state fluctuates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/28" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/2804" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2804</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2808" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a mixing element which evenly distributes an input signal over a number of outputs</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/2813" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2813</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on multimode interference effect, i.e. self-imaging</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2817" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2817</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using reflective elements to split or combine optical signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2821" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2821</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using lateral coupling between contiguous fibres to split or combine optical signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/2826" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical machining means for shaping of the couplers, e.g. grinding or polishing </text><reference><text>grinding, polishing in general <class-ref scheme="cpc">B24</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/283" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>couplers being tunable or adjustable</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/2835" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2835</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>formed or shaped by thermal treatment, e.g. couplers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="14" additional-only="true" sort-key="G02B6/2839" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2006/2839</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>fabricated from double or twin core fibres</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/2843" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2843</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the couplers having polarisation maintaining or holding properties </text><reference><text>polarisation preserving light guides <class-ref scheme="cpc">G02B6/105</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2848" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2848</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having refractive means, e.g. imaging elements between light guides as splitting, branching and/or combining devices, e.g. lenses, holograms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2852" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2852</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using tapping light guides arranged sidewardly, e.g. in a non-parallel relationship with respect to the bus light guides (light extraction or launching through cladding, with or without surface discontinuities, bent structures)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2856" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2856</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>formed or shaped by thermal heating means, e.g. splitting, branching and/or combining elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/2861" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2861</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using fibre optic delay lines and optical elements associated with them, e.g. for use in signal processing, e.g. filtering </text><reference><text>delay lines in general <class-ref scheme="cpc">H03H</class-ref>, <class-ref scheme="cpc">H01P9/00</class-ref>; optical computing devices <class-ref scheme="cpc">G06E</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02B6/2865" definition-exists="false" ipc-concordant="G02B6/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2006/2865</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>couplers of the 3x3 type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/287" definition-exists="false" ipc-concordant="G02B6/287" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/287</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Structuring of light guides to shape optical elements with heat application </text><reference><text><class-ref scheme="cpc">G02B6/255</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/293" definition-exists="true" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B6/293</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>with wavelength selective means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/29301" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29301</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on a phased array of light guides </text><reference><text>integrated arrayed waveguide gratings <class-ref scheme="cpc">G02B6/12009</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/29302" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on birefringence or polarisation, e.g. wavelength dependent birefringence, polarisation interferometers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/29304" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29304</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating by diffraction, e.g. grating </text><reference><text><class-ref scheme="cpc">G02B6/29301</class-ref> takes precedence; spectrometers using gratings <class-ref scheme="cpc">G01J3/18</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29305" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as bulk element, i.e. free space arrangement external to a light guide</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29307" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29307</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>components assembled in or forming a solid transparent unitary block, e.g. for facilitating component alignment</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29308" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29308</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffractive element having focusing properties, e.g. curved gratings </text><reference><text>Rowland circle spectrometers <class-ref scheme="cpc">G01J3/20</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/2931" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2931</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffractive element operating in reflection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29311" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29311</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffractive element operating in transmission</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29313" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29313</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by means for controlling the position or direction of light incident to or leaving the diffractive element, e.g. for varying the wavelength response </text><reference><text>switching <class-ref scheme="cpc">G02B6/35</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29314" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29314</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by moving or modifying the diffractive element, e.g. deforming</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29316" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29316</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide </text><reference><text><class-ref scheme="cpc">G02B6/02057</class-ref>, <class-ref scheme="cpc">G02B6/29332</class-ref>, <class-ref scheme="cpc">G02B6/29356</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29317" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29317</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light guides of the optical fibre type</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29319" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29319</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>With a cascade of diffractive elements or of diffraction operations </text><reference><text>forming interferometer by splitting and recombining <class-ref scheme="cpc">G02B6/29347</class-ref> - <class-ref scheme="cpc">G02B6/29358</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="G02B6/2932" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2932</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a directional router, e.g. directional coupler, circulator</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29322" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29322</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffractive elements of the tunable type </text><reference><text><class-ref scheme="cpc">G02B6/02195</class-ref> takes precedence; optical modulation devices based on a change of the optical properties of the medium <class-ref scheme="cpc">G02F1/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29323" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29323</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coupling to or out of the diffractive element through the lateral surface of the light guide </text><reference><text>evanescent grating couplers <class-ref scheme="cpc">G02B6/29332</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29325" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the slab or planar or plate like form, i.e. confinement in a single transverse dimension only </text><reference><text>integrated circuit planar waveguide arrangements <class-ref scheme="cpc">G02B6/12007</class-ref>; specially adapted for lighting <class-ref scheme="cpc">G02B6/0011</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29326" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29326</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffractive elements having focusing properties, e.g. curved gratings </text><reference><text>Rowland circle spectrometers <class-ref scheme="cpc">G01J3/20</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29328" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29328</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffractive elements operating in reflection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29329" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29329</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffractive elements operating in transmission</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/29331" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29331</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating by evanescent wave coupling</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29332" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29332</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wavelength selective couplers, i.e. based on evanescent coupling between light guides, e.g. fused fibre couplers with transverse coupling between fibres having different propagation constant wavelength dependency </text><reference><text>non wavelength-selective light guide couplers <class-ref scheme="cpc">G02B6/28</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29334" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29334</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grating-assisted evanescent light guide couplers, i.e. comprising grating at or functionally associated with the coupling region between the light guides, e.g. with a grating positioned where light fields overlap in the coupler</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29335" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29335</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Evanescent coupling to a resonator cavity, i.e. between a waveguide mode and a resonant mode of the cavity </text><reference><text>wavelength selective means based on resonator cavity coupled non-evanescently <class-ref scheme="cpc">G02B6/29356</class-ref>, <class-ref scheme="cpc">G02B6/29358</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29337" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29337</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cavities of the linear kind, e.g. formed by reflectors at ends of a light guide</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29338" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29338</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Loop resonators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/2934" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2934</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fibre ring resonators, e.g. fibre coils</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29341" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29341</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Loop resonators operating in a whispering gallery mode evanescently coupled to a light guide, e.g. sphere or disk or cylinder </text><reference><text>evanescent coupling for sensing fluorescence <class-ref scheme="cpc">G01N21/648</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29343" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29343</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cascade of loop resonators</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/29344" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29344</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating by modal interference or beating, i.e. of transverse modes, e.g. zero-gap directional coupler, MMI</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/29346" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29346</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating by wave or beam interference </text><reference><text>interferometers for measuring <class-ref scheme="cpc">G01B9/02</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29347" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29347</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Loop interferometers, e.g. Sagnac, loop mirror</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29349" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29349</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Michelson or Michelson/Gires-Tournois configuration, i.e. based on splitting and interferometrically combining relatively delayed signals at a single beamsplitter</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/2935" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2935</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mach-Zehnder configuration, i.e. comprising separate splitting and combining means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29352" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29352</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a light guide</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29353" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29353</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a wavelength selective element in at least one light guide interferometer arm, e.g. grating, interference filter, resonator</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29355" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29355</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cascade arrangement of interferometers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29356" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29356</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interference cavity within a single light guide, e.g. between two fibre gratings </text><reference><text><class-ref scheme="cpc">G02B6/29347</class-ref> - <class-ref scheme="cpc">G02B6/2935</class-ref> take precedence; evanescent coupling to a resonator cavity <class-ref scheme="cpc">G02B6/29335</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29358" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29358</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple beam interferometer external to a light guide, e.g. Fabry-Pérot, etalon, VIPA plate, OTDL plate, continuous interferometer, parallel plate resonator </text><reference><text><class-ref scheme="cpc">G02B6/29347</class-ref>, <class-ref scheme="cpc">G02B6/29349</class-ref>, <class-ref scheme="cpc">G02B6/2935</class-ref>, <class-ref scheme="cpc">G02B6/29361</class-ref> take precedence; resonator evanescently coupled to light guide <class-ref scheme="cpc">G02B6/29335</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29359" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29359</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cavity formed by light guide ends, e.g. fibre Fabry Pérot [FFP]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29361" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29361</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29362" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29362</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Serial cascade of filters or filtering operations, e.g. for a large number of channels</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29364" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29364</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cascading by a light guide path between filters or filtering operations, e.g. fibre interconnected single filter modules</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29365" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29365</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a multireflection configuration, i.e. beam following a zigzag path between filters or filtering operations</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="16" additional-only="false" sort-key="G02B6/29367" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29367</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Zigzag path within a transparent optical block, e.g. filter deposited on an etalon, glass plate, wedge acting as a stable spacer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29368" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29368</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light guide comprising the filter, e.g. filter deposited on a fibre end </text><reference><text><class-ref scheme="cpc">G02B6/29359</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/2937" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2937</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>In line lens-filtering-lens devices, i.e. elements arranged along a line and mountable in a cylindrical package for compactness, e.g. 3- port device with GRIN lenses sandwiching a single filter operating at normal incidence in a tubular package</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/29371" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29371</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating principle based on material dispersion</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29373" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29373</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>utilising a bulk dispersive element, e.g. prism</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29374" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29374</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in an optical light guide </text><reference><text><class-ref scheme="cpc">G02B6/02214</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29376" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29376</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>coupling light guides for controlling wavelength dispersion, e.g. by concatenation of two light guides having different dispersion properties </text><reference><text>dispersion managed optical transmission systems <class-ref scheme="cpc">H04B10/25253</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29377" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29377</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlling dispersion around 1550 nm, i.e. S, C, L and U bands from 1460-1675 nm</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/29379" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29379</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the function or use of the complete device</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/2938" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/2938</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29382" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29382</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including at least adding or dropping a signal, i.e. passing the majority of signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29383" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29383</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adding and dropping</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/29385" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>G02B6/29385</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Channel monitoring, e.g. by tapping </text><reference><text>channel monitoring in optical transmission systems <class-ref scheme="cpc">H04B10/07</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29386" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29386</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Interleaving or deinterleaving, i.e. separating or mixing subsets of optical signals, e.g. combining even and odd channels into a single optical signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29388" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29388</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for lighting or use with non-coherent light</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29389" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29389</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bandpass filtering, e.g. 1x1 device rejecting or passing certain wavelengths </text><reference><text><class-ref scheme="cpc">G02B6/2938</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29391" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29391</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Power equalisation of different channels, e.g. power flattening</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29392" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29392</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling dispersion </text><reference><text><class-ref scheme="cpc">G02B6/02214</class-ref> takes precedence; modal dispersion control <class-ref scheme="cpc">G02B6/268</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/29394" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>G02B6/29394</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Compensating wavelength dispersion </text><reference><text><class-ref scheme="cpc">G02B6/29376</class-ref> takes precedence; dispersion compensated optical transmission systems <class-ref scheme="cpc">H04B10/2507</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29395" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29395</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>configurable, e.g. tunable or reconfigurable </text><reference><text>switching <class-ref scheme="cpc">G02B6/35</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29397" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29397</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polarisation insensitivity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/29398" definition-exists="false" ipc-concordant="G02B6/293" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/29398</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Temperature insensitivity</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/30" definition-exists="false" ipc-concordant="G02B6/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for use between fibre and thin-film device</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/305" definition-exists="false" ipc-concordant="G02B6/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and having an integrated mode-size expanding section, e.g. tapered waveguide</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/32" definition-exists="false" ipc-concordant="G02B6/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having lens focusing means </text><CPC-specific-text><text>positioned between opposed fibre ends </text><reference><text>with lens being an integral part of the single fibre end <class-ref scheme="cpc">G02B6/262</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/322" definition-exists="false" ipc-concordant="G02B6/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/322</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and having centering means being part of the lens for the self-positioning of the lightguide at the focal point, e.g. holes, wells, indents, nibs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/325" definition-exists="false" ipc-concordant="G02B6/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a transparent member, e.g. window, protective plate</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/327" definition-exists="false" ipc-concordant="G02B6/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/327</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with angled interfaces to reduce reflections</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/34" definition-exists="false" ipc-concordant="G02B6/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>utilising prism or grating </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02B6/293</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/35" definition-exists="true" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B6/35</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>having switching means </text><reference><text>by changing the optical properties of the medium <class-ref scheme="cpc">G02F1/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3502" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3502</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving direct waveguide displacement, e.g. cantilever type waveguide displacement involving waveguide bending, or displacing an interposed waveguide between stationary waveguides</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3504" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3504</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rotating, tilting or pivoting the waveguides, or with the waveguides describing a curved path </text><reference><text>rotary joint <class-ref scheme="cpc">G02B6/3628</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3506" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3506</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Translating the waveguides along the beam path, e.g. by varying the distance between opposed waveguide ends, or by translation of the waveguide ends</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3508" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3508</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lateral or transverse displacement of the whole waveguides, e.g. by varying the distance between opposed waveguide ends, or by mutual lateral displacement of opposed waveguide ends</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/351" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/351</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving stationary waveguides with moving interposed optical elements </text><reference><text><class-ref scheme="cpc">G02B6/3538</class-ref> takes precedence; interposed waveguides <class-ref scheme="cpc">G02B6/3502</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3512" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3512</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the optical element being reflective, e.g. mirror</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3514" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3514</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the reflective optical element moving along a line so as to translate into and out of the beam path, i.e. across the beam path</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3516" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B6/3516</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>the reflective optical element moving along the beam path, e.g. controllable diffractive effects using multiple micromirrors within the beam</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3518" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3518</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the reflective optical element being an intrinsic part of a MEMS device, i.e. fabricated together with the MEMS device </text><reference><text>MEMS devices in general <class-ref scheme="cpc">B81B</class-ref>; manufacture of MEM devices in general <class-ref scheme="cpc">B81C</class-ref>; micromechanical devices controlling the direction of light <class-ref scheme="cpc">G02B26/0833</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/352" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/352</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the reflective optical element having a shaped reflective surface, e.g. a reflective element comprising several reflective surfaces or facets that function together</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3522" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3522</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the optical element enabling or impairing total internal reflection </text><reference><text>using evanescent coupling <class-ref scheme="cpc">G02B6/3536</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3524" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3524</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the optical element being refractive</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3526" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3526</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the optical element being a lens</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3528" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3528</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the optical element being a prism</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/353" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/353</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the optical element being a shutter, baffle, beam dump or opaque element </text><reference><text>absorbers on light guide termination <class-ref scheme="cpc">G02B6/243</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3532" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3532</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the optical element being a wavelength independent filter or having spatially dependent transmission properties, e.g. neutral filter or neutral density wedge substrate with plurality of density filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3534" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3534</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the optical element being diffractive, i.e. a grating</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3536" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3536</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving evanescent coupling variation, e.g. by a moving element such as a membrane which changes the effective refractive index </text><reference><text>mode converters <class-ref scheme="cpc">G02B6/14</class-ref>; adjustable lateral coupling between waveguides <class-ref scheme="cpc">G02B6/283</class-ref>; electro- optical refractive index variations <class-ref scheme="cpc">G02F1/0118</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3538" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3538</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on displacement or deformation of a liquid </text><reference><text>controlling the intensity of light by displacement or deformation of a fluid in general <class-ref scheme="cpc">G02B26/004</class-ref>; fluid-filled lens of variable focal length <class-ref scheme="cpc">G02B3/14</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/354" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/354</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switching arrangements, i.e. number of input/output ports and interconnection types</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3542" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3542</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Non-blocking switch, e.g. with multiple potential paths between multiple inputs and outputs, the establishment of one switching path not preventing the establishment of further switching paths</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3544" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3544</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>2D constellations, i.e. with switching elements and switched beams located in a plane</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3546" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3546</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>NxM switch, i.e. a regular array of switches elements of matrix type constellation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3548" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3548</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>1xN switch, i.e. one input and a selectable single output of N possible outputs</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/355" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/355</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>1x2 switch, i.e. one input and a selectable single output of two possible outputs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3552" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G02B6/3552</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>1x1 switch, e.g. on/off switch</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3554" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3554</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>3D constellations, i.e. with switching elements and switched beams located in a volume</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3556" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3556</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>NxM switch, i.e. regular arrays of switches elements of matrix type constellation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3558" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3558</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>1xN switch, i.e. one input and a selectable single output of N possible outputs</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/356" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/356</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in an optical cross-connect device, e.g. routing and switching aspects of interconnecting different paths propagating different wavelengths to (re)configure the various input and output links </text><reference><text>switching polarized beams <class-ref scheme="cpc">G02B6/3594</class-ref>; power equalizers <class-ref scheme="cpc">G02B6/356</class-ref> and <class-ref scheme="cpc">G02B6/3594</class-ref>; path selecting means <class-ref scheme="cpc">H04Q11/0001</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3562" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3562</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Switch of the bypass type, i.e. enabling a change of path in a network, e.g. to bypass a failed element in the network</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3564" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3564</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanical details of the actuation mechanism associated with the moving element or mounting mechanism details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3566" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3566</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving bending a beam, e.g. with cantilever</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3568" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3568</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the actuating force</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/357" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/357</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrostatic force </text><reference><text>electrostatic forces controlling reflecting elements in general <class-ref scheme="cpc">G02B26/0841</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3572" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3572</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Magnetic force </text><reference><text>magnetic forces controlling reflecting elements in general <class-ref scheme="cpc">G02B26/085</class-ref>; magneto-optic devices <class-ref scheme="cpc">G02F1/09</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3574" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3574</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanical force, e.g. pressure variations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3576" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3576</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Temperature or heat actuation </text><reference><text>thermal forces controlling reflecting elements in general <class-ref scheme="cpc">G02B26/0866</class-ref>; thermo-optic devices <class-ref scheme="cpc">G02F1/0147</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3578" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3578</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Piezoelectric force </text><reference><text>piezoelectric forces controlling reflecting elements in general <class-ref scheme="cpc">G02B26/0858</class-ref>; piezo-optic devices <class-ref scheme="cpc">G02F1/0131</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/358" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/358</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Latching of the moving element, i.e. maintaining or holding the moving element in place once operation has been performed; includes a mechanically bistable system</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3582" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3582</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Housing means or package or arranging details of the switching elements, e.g. for thermal isolation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3584" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G02B6/3584</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>constructional details of an associated actuator having a MEMS construction, i.e. constructed using semiconductor technology such as etching </text><reference><text>MEMS <u>per se</u> <class-ref scheme="cpc">B81B</class-ref>, <class-ref scheme="cpc">B81C</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3586" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B6/3586</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control or adjustment details, e.g. calibrating </text><reference><text>testing optical equipment <class-ref scheme="cpc">G01M11/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3588" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3588</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the processed beams, i.e. controlling during switching of orientation, alignment, or beam propagation properties such as intensity, size or shape</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/359" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G02B6/359</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>of the position of the moving element itself during switching, i.e. without monitoring the switched beams</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3592" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3592</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for removing polarization dependence of the switching means, i.e. polarization insensitive switching </text><reference><text>light guides coupling with polarization selective and adjusting means <class-ref scheme="cpc">G02B6/27</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3594" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3594</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Characterised by additional functional means, e.g. means for variably attenuating or branching or means for switching differently polarized beams</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3596" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3596</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>With planar waveguide arrangement, i.e. in a substrate, regardless if actuating mechanism is outside the substrate</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3598" definition-exists="false" ipc-concordant="G02B6/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G02B6/3598</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Switching means directly located between an optoelectronic element and waveguides, including direct displacement of either the element or the waveguide, e.g. optical pulse generation </text><reference><text>based on changing the optical properties of the medium <class-ref scheme="cpc">G02F1/00</class-ref>; optical pulse generation in optical transmitters <class-ref scheme="cpc">H04B10/508</class-ref>; optical pulse generation by controlling laser operation <class-ref scheme="cpc">H01S3/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/36" definition-exists="true" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-08-01" status="published"><classification-symbol>G02B6/36</classification-symbol><class-title date-revised="2020-08-01"><title-part><text>Mechanical coupling means </text><reference><text><class-ref scheme="cpc">G02B6/255</class-ref>, <class-ref scheme="cpc">G02B6/42</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/3604" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3604</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rotary joints allowing relative rotational movement between opposing fibre or fibre bundle ends</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/3608" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3608</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fibre wiring boards, i.e. where fibres are embedded or attached in a pattern on or to a substrate, e.g. flexible sheets </text><reference><text>optical ribbon cables in support members <class-ref scheme="cpc">G02B6/4401</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3612" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3612</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wiring methods or machines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/3616" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B6/3616</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Holders, macro size fixtures for mechanically holding or positioning fibres, e.g. on an optical bench </text><reference><text>supporting carriers of a microbench type <class-ref scheme="cpc">G02B6/3648</class-ref>; micromanipulators <class-ref scheme="cpc">B25J7/00</class-ref>; cassettes, bobbins <class-ref scheme="cpc">G02B6/4439</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/362" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/362</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vacuum holders for optical elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3624" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3624</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fibre head, e.g. fibre probe termination </text><reference><text>optical details of light guide terminations <class-ref scheme="cpc">G02B6/241</class-ref>; reshaping of light guides <class-ref scheme="cpc">G02B6/2552</class-ref>; optical details of coupling light into or out of fibre end <class-ref scheme="cpc">G02B6/262</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/3628" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3628</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for mounting fibres to supporting carriers </text><reference><text><class-ref scheme="cpc">G02B6/3608</class-ref>, <class-ref scheme="cpc">G02B6/3616</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3632" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3632</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the cross-sectional shape of the mechanical coupling means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3636" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3636</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the mechanical coupling means being grooves </text><reference><text><class-ref scheme="cpc">G02B6/3652</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/364" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/364</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>inverted grooves, e.g. dovetails</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3644" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3644</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the coupling means being through-holes or wall apertures</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3648" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B6/3648</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Supporting carriers of a microbench type, i.e. with micromachined additional mechanical structures </text><reference><text>microstructured devices <u>per se</u> <class-ref scheme="cpc">B81B</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3652" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B6/3652</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>the additional structures being prepositioning mounting areas, allowing only movement in one dimension, e.g. grooves, trenches or vias in the microbench surface, i.e. self aligning supporting carriers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3656" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B6/3656</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>the additional structures being micropositioning, with microactuating elements for fine adjustment, or restricting movement, into two dimensions, e.g. cantilevers, beams, tongues or bridges with associated MEMs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/366" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B6/366</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>the additional structures allowing for adjustment or alignment in all dimensions, i.e. 3D microoptics arrangements, e.g. free space optics on the microbench, microhinges or spring latches, with associated microactuating elements for fine adjustment or alignment</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3664" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3664</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>2D cross sectional arrangements of the fibres</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3668" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3668</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with conversion in geometry of the cross section</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3672" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3672</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with fibres arranged in a regular matrix array</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3676" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3676</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stacked arrangement</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/368" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/368</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with pitch conversion between input and output plane, e.g. for increasing packing density</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3684" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B6/3684</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>characterised by the manufacturing process of surface profiling of the supporting carrier </text><reference><text>manufacturing microsystems <u>per se</u> <class-ref scheme="cpc">B81C1/00015</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3688" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3688</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using laser ablation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3692" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B6/3692</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>with surface micromachining involving etching, e.g. wet or dry etching steps </text><reference><text>surface micromachining involving subtractive techniques <class-ref scheme="cpc">B81C1/00055</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3696" definition-exists="false" ipc-concordant="G02B6/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-02-01" status="published"><classification-symbol>G02B6/3696</classification-symbol><class-title date-revised="2019-02-01"><title-part><CPC-specific-text><text>by moulding, e.g. injection moulding, casting, embossing, stamping, stenciling, printing, or with metallic mould insert manufacturing using LIGA or MIGA techniques </text><reference><text>shaping the mould surface by machining <class-ref scheme="cpc">B29C33/38</class-ref>; moulding techniques <class-ref scheme="cpc">B29C39/00</class-ref>, <class-ref scheme="cpc">B29C43/00</class-ref>, <class-ref scheme="cpc">B29C45/00</class-ref>, <class-ref scheme="cpc">B29C48/00</class-ref>, <class-ref scheme="cpc">B29C59/00</class-ref>; stamping, printing or embossing techniques <class-ref scheme="cpc">B81C1/00444</class-ref>; surface micromachining using LIGA <class-ref scheme="cpc">B81C2201/032</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/38" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having fibre to fibre mating means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3801" definition-exists="true" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3801</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Permanent connections, i.e. wherein fibres are kept aligned by mechanical means </text><reference><text>splices by bonding <class-ref scheme="cpc">G02B6/255</class-ref>; fusion splices <class-ref scheme="cpc">G02B6/2551</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3802" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3802</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Assembly tools, e.g. crimping tool or pressing bench </text><reference><text>splicing machines <class-ref scheme="cpc">G02B6/2553</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3803" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3803</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adjustment or alignment devices for alignment prior to splicing</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3805" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3805</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a fibre-supporting member inclined to the bottom surface of the alignment means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3806" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Semi-permanent connections, i.e. wherein the mechanical means keeping the fibres aligned allow for removal of the fibres </text><reference><text>dismountable connectors <class-ref scheme="cpc">G02B6/3807</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/3807" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3807</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dismountable connectors, i.e. comprising plugs</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3809" definition-exists="true" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3809</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>without a ferrule embedding the fibre end, i.e. with bare fibre end</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/381" definition-exists="true" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/381</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3812" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3812</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having polarisation-maintaining light guides </text><reference><text>light guides having polarisation effects <u>per se</u> <class-ref scheme="cpc">G02B6/105</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3813" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3813</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for transmission of high energy beam </text><reference><text>coupling high energy sources and light guides <class-ref scheme="cpc">G02B6/4296</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3814" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3814</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with cooling or heat dissipation means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3816" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use under water, high pressure connectors </text><reference><text>provisionally <u>see</u> <class-ref scheme="cpc">G02B6/4428</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3817" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>G02B6/3817</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing optical and electrical conductors </text><reference><text>cables including electrical and optical conductors <class-ref scheme="cpc">H01B11/22</class-ref>; <class-ref scheme="cpc">G02B6/3816</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3818" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3818</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of a low-reflection-loss type </text><reference><text><class-ref scheme="cpc">G02B6/3813</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/382" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/382</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with index-matching medium between light guides </text><reference><text>provisionally <u>see</u> <class-ref scheme="cpc">G02B6/4212</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3821" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3821</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with axial spring biasing or loading means </text><reference><text><class-ref scheme="cpc">G02B6/3847</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3822" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3822</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with beveled fibre ends</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3823" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3823</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing surplus lengths, internal fibre loops </text><reference><text>provisionally <u>see</u> also <class-ref scheme="cpc">G02B6/444</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3825" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with an intermediate part, e.g. adapter, receptacle, linking two plugs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3826" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3826</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by form or shape</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3827" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3827</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Wrap-back connectors, i.e. containing a fibre having an U shape</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3829" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3829</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bent or angled connectors </text><reference><text><class-ref scheme="cpc">G02B6/3827</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/383" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-11-01" status="published"><classification-symbol>G02B6/383</classification-symbol><class-title date-revised="2015-11-01"><title-part><CPC-specific-text><text>Hermaphroditic connectors, i.e. two identical plugs mating with one another, each plug having both male and female diametrically opposed engaging parts; </text><reference><text>electric hermaphroditic coupling <class-ref scheme="cpc">H01R24/84</class-ref>, <class-ref scheme="cpc">H01R13/28</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3831" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3831</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a keying element on the plug or adapter, e.g. to forbid wrong connection </text><reference><text>keying element on the ferrule <class-ref scheme="cpc">G02B6/3851</class-ref>; keying element for electrical coupling <class-ref scheme="cpc">H01R13/64</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3833" definition-exists="true" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3833</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of mounting fibres in ferrules; Assembly methods; Manufacture</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3834" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3834</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for centering or aligning the light guide within the ferrule</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3835" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3835</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using discs, bushings or the like</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/3837" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3837</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>forwarding or threading methods of light guides into apertures of ferrule centering means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3838" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3838</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using grooves for light guides</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/3839" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3839</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for a plurality of light guides</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3841" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3841</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using rods, balls for light guides</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/3842" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3842</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for a plurality of light guides</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3843" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3843</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with auxiliary facilities for movably aligning or adjusting the fibre within its ferrule, e.g. measuring position or eccentricity </text><reference><text>testing the alignment of axes, including eccentricity, <class-ref scheme="cpc">G01B11/27</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3845" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3845</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ferrules comprising functional elements, e.g. filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3846" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3846</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with fibre stubs</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3847" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3847</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means preventing fibre end damage, e.g. recessed fibre surfaces</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3849" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3849</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using mechanical protective elements, e.g. caps, hoods, sealing membranes </text><reference><text><class-ref scheme="cpc">G02B6/3816</class-ref> takes precedence; provisionally <u>see</u> <class-ref scheme="cpc">H01R13/44</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/385" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/385</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Accessories for testing or observation of connectors </text><reference><text>means for centering or aligning the light guide within the ferrule with auxiliary facilities for movably aligning or adjusting the fibre within its ferrule, measuring position, eccentricity <class-ref scheme="cpc">G02B6/3843</class-ref>; mechanical features associated with the optical testing of optical fibres <class-ref scheme="cpc">G01M11/088</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3851" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3851</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ferrules having keying or coding means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3853" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3853</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lens inside the ferrule </text><reference><text>lensed connectors <class-ref scheme="cpc">G02B6/32</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3854" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3854</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ferrules characterised by materials</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3855" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3855</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the method of anchoring or fixing the fibre within the ferrule </text><reference><text><class-ref scheme="cpc">G02B6/3854</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3857" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3857</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Crimping, i.e. involving plastic deformation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3858" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3858</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Clamping, i.e. with only elastic deformation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/3859" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3859</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ferrules characterised by use of shape memory material [SMM], e.g. heat recoverable polymers, Ti-Ni compounds </text><reference><text>chemical aspects of SMM <u>see</u> the relevant places under <class-ref scheme="cpc">C08</class-ref> and <class-ref scheme="cpc">C22</class-ref>; SMM used for shaping by moulding <class-ref scheme="cpc">B29C61/00</class-ref>; SMM for electrical coupling <class-ref scheme="cpc">H01R4/01</class-ref>, <class-ref scheme="cpc">H01R4/72</class-ref>, <class-ref scheme="cpc">H01R12/856</class-ref>, <class-ref scheme="cpc">H02G15/1806</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3861" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3861</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adhesive bonding </text><reference><text>adhesives in general <class-ref scheme="cpc">C09J</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3862" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3862</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>radially-compressed, longitudinally-split ferrules consisting of a pair of identical matching halves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3863" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3863</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>fabricated by using polishing techniques </text><reference><text>grinding of the fibre ends <class-ref scheme="cpc">B24B19/226</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3865" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3865</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>fabricated by using moulding techniques </text><reference><text>shaping techniques of plastic materials in general <class-ref scheme="cpc">B29C</class-ref>; producing plastic optical fiber connectors <class-ref scheme="cpc">B29D11/0075</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3866" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Devices, tools or methods for cleaning connectors </text><reference><text>cleaning in general <class-ref scheme="cpc">B08B</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3867" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3867</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising air venting holes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3869" definition-exists="true" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3869</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting ferrules to connector body, i.e. plugs</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/387" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/387</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Connector plugs comprising two complementary members, e.g. shells, caps, covers, locked together</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3871" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-09-01" status="published"><classification-symbol>G02B6/3871</classification-symbol><class-title date-revised="2015-09-01"><title-part><CPC-specific-text><text>Ferrule rotatable with respect to plug body, e.g. for setting rotational position </text><reference><text>adjusting fibre within the ferrule, <class-ref scheme="cpc">G02B6/3843</class-ref></text></reference><text>; Fixation of ferrules after rotation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3873" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3873</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3874" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3874</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using tubes, sleeves to align ferrules</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3875" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3875</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Floatingly supported sleeves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3877" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3877</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Split sleeves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3878" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3878</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a plurality of ferrules, branching and break-out means</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G02B6/3879" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3879</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Linking of individual connector plugs to an overconnector, e.g. using clamps, clips, common housings comprising several individual connector plugs</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3881" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3881</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using grooves to align ferrule ends</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3882" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3882</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using rods, pins or balls to align a pair of ferrule ends</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/3883" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3883</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using rods, pins or balls to align a plurality of pairs of ferrule ends</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3885" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3885</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type </text><reference><text>optical ribbon cable <class-ref scheme="cpc">G02B6/4403</class-ref>, <class-ref scheme="cpc">G02B6/448</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3886" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3886</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Magnetic means to align ferrule ends</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3887" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G02B6/3887</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Anchoring optical cables to connector housings, e.g. strain relief features</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G02B6/3887</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G02B6/38875</class-ref> and <class-ref scheme="cpc">G02B6/3888</class-ref>. <br/>Groups <class-ref scheme="cpc">G02B6/3887</class-ref>, <class-ref scheme="cpc">G02B6/38875</class-ref> and <class-ref scheme="cpc">G02B6/3888</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/38875" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G02B6/38875</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Protection from bending or twisting</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G02B6/38875</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G02B6/3887</class-ref> and <class-ref scheme="cpc">G02B6/3889</class-ref>.<br/>Groups <class-ref scheme="cpc">G02B6/3887</class-ref>, <class-ref scheme="cpc">G02B6/3889</class-ref> and <class-ref scheme="cpc">G02B6/38875</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3888" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G02B6/3888</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Protection from over-extension or over-compression</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G02B6/3888</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G02B6/3887</class-ref> and <class-ref scheme="cpc">G02B6/3889</class-ref>. <br/>Groups <class-ref scheme="cpc">G02B6/3887</class-ref>, <class-ref scheme="cpc">G02B6/3889</class-ref> and <class-ref scheme="cpc">G02B6/3888</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3889" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G02B6/3889</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>using encapsulation for protection, e.g. adhesive, molding or casting resin</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G02B6/3889</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G02B6/38875</class-ref> and <class-ref scheme="cpc">G02B6/3888</class-ref>.<br/>Groups <class-ref scheme="cpc">G02B6/3889</class-ref>, <class-ref scheme="cpc">G02B6/38875</class-ref> and <class-ref scheme="cpc">G02B6/3888</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/389" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G02B6/389</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the method of fastening connecting plugs and sockets, e.g. screw- or nut-lock, snap-in, bayonet type</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3891" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3891</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bayonet type</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3893" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3893</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Push-pull type, e.g. snap-in, push-on</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/3894" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3894</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Screw-lock type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3895" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3895</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>identification of connection, e.g. right plug to the right socket or full engagement of the mating parts </text><reference><text>keying element on the plug or adapter <class-ref scheme="cpc">G02B6/3831</class-ref>; keying element on the ferrule <class-ref scheme="cpc">G02B6/3851</class-ref>; keying element for electrical connection <class-ref scheme="cpc">H01R13/64</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3897" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3897</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Connectors fixed to housings, casings, frames, circuit boards</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/3898" definition-exists="false" ipc-concordant="G02B6/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/3898</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tools, e.g. handheld; Tuning wrenches; Jigs used with connectors, e.g. for extracting, removing or inserting in a panel, for engaging or coupling connectors, for assembling or disassembling components within the connector, for applying clips to hold two connectors together or for crimping </text><reference><text>tools for cleaning, <class-ref scheme="cpc">G02B6/3866</class-ref>; tools in general <class-ref scheme="cpc">B25B</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/40" definition-exists="false" ipc-concordant="G02B6/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having fibre bundle mating means</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/403" definition-exists="false" ipc-concordant="G02B6/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the ferrule type, connecting a pair of ferrules</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/406" definition-exists="false" ipc-concordant="G02B6/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/406</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the ferrule type, connecting a plurality of pairs of ferrules</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/42" definition-exists="true" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coupling light guides with opto-electronic elements</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> In this group, the following expression is used with the meaning indicated: <subnote type="bullet"><note-paragraph>"opto-electronic elements" includes light emitting elements, e.g. lasers or LED's, as well as light receiving elements, e.g. photodiodes or phototransistors </note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4201" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4201</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Packages, e.g. shape, construction, internal or external details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4202" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for coupling an active element with fibres without intermediate optical elements, e.g. fibres with plane ends, fibres with shaped ends, bundles</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4203" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4203</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical features</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4204" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4204</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the coupling comprising intermediate optical elements, e.g. lenses, holograms </text><reference><text>encapsulated active devices <class-ref scheme="cpc">H01S5/02208</class-ref>, <class-ref scheme="cpc">H01L33/52</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4206" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical features </text><reference><text><class-ref scheme="cpc">G02B6/4207</class-ref>, <class-ref scheme="cpc">G02B6/421</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4207" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4207</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with optical elements reducing the sensitivity to optical feedback </text><reference><text>anti-reflection devices specially adapted for lasers, <u>see</u> <class-ref scheme="cpc">H01S3/0064</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4208" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using non-reciprocal elements or birefringent plates, i.e. quasi-isolators </text><reference><text>optical isolators <u>per se</u> <class-ref scheme="cpc">G02F1/093</class-ref>, <class-ref scheme="cpc">G02F1/0955</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/4209" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical features</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/421" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/421</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the intermediate optical component consisting of a short length of fibre, e.g. fibre stub</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4212" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4212</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the intermediate optical element being a coupling medium interposed therebetween, e.g. epoxy resin, refractive index matching material, index grease, matching liquid or gel</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4213" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4213</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the intermediate optical elements being polarisation selective optical elements </text><reference><text><class-ref scheme="cpc">G02B6/27</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4214" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4214</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device </text><reference><text><class-ref scheme="cpc">G02B6/4246</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4215" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers </text><reference><text><class-ref scheme="cpc">G02B6/4246</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4216" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4216</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>incorporating polarisation-maintaining fibres </text><reference><text>polarisation-maintaining fibres <u>per se</u> <class-ref scheme="cpc">G02B6/105</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4218" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4218</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical features</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4219" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4219</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/422" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements </text><reference><text><class-ref scheme="cpc">G02B6/4233</class-ref>, <class-ref scheme="cpc">G02B6/4234</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4221" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4221</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a visual detection of the position of the elements, e.g. by using a microscope or a camera</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/4222" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by observing back-reflected light</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/4224" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4224</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using visual alignment markings, e.g. index methods</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4225" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by a direct measurement of the degree of coupling, e.g. the amount of light power coupled to the fibre or the opto-electronic element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4226" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4226</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Positioning means for moving the elements into alignment, e.g. alignment screws, deformation of the mount</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4227" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Active alignment methods, e.g. procedures and algorithms</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4228" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Passive alignment, i.e. without a detection of the degree of coupling or the position of the elements </text><reference><text><class-ref scheme="cpc">G02B6/4234</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/423" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using guiding surfaces for the alignment</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/4231" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4231</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with intermediate elements, e.g. rods and balls, between the elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4232" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4232</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the surface tension of fluid solder to align the elements, e.g. solder bump techniques </text><reference><text>flip-chip mounting techniques in assembly of semiconductor devices <class-ref scheme="cpc">H01L24/81</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4233" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4233</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Active alignment along the optical axis and passive alignment perpendicular to the optical axis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4234" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4234</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Passive alignment along the optical axis and active alignment perpendicular to the optical axis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4236" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fixing or mounting methods of the aligned elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4237" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4237</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Welding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4238" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4238</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Soldering</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4239" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4239</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adhesive bonding; Encapsulation with polymer material</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/424" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/424</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting of the optical light guide</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/4242" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting of the optical light guide to the lid of the package</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/4243" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4243</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting of the optical light guide into a groove </text><reference><text>mounting optical light guides into a groove in general <class-ref scheme="cpc">G02B6/3636</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4244" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting of the optical elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4245" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting of the opto-electronic elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4246" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4246</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bidirectionally operating package structures</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4248" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B6/4248</classification-symbol><class-title date-revised="2016-11-01"><title-part><CPC-specific-text><text>Feed-through connections for the hermetical passage of fibres through a package wall </text><reference><text><u>see</u> provisionally also <class-ref scheme="cpc">G02B6/4428</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4249" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4249</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising arrays of active devices and fibres</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/425" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical features </text><reference><text>semiconductor laser arrays <class-ref scheme="cpc">H01S5/40</class-ref>; hybrid LED arrays <class-ref scheme="cpc">H01L25/0753</class-ref>; monolithic LED arrays <class-ref scheme="cpc">H01L27/153</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4251" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4251</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sealed packages </text><reference><text><class-ref scheme="cpc">G02B6/4248</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4253" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4253</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by embedding housing components in an adhesive or a polymer material </text><reference><text><class-ref scheme="cpc">G02B6/4212</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4254" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with an inert gas, e.g. nitrogen or oxygen </text><reference><text>gas filled packages for semiconductor lasers <class-ref scheme="cpc">H01S5/0222</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4255" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Moulded or casted packages</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4256" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4256</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of housings</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4257" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a supporting carrier or a mounting substrate or a mounting plate </text><reference><text><class-ref scheme="cpc">G02B6/3648</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4259" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4259</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the transparent type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/426" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>mounting, engaging or coupling of the package to a board, a frame or a panel</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4261" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Packages with mounting structures to be pluggable or detachable, e.g. having latches or rails</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4262" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4262</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the shape of the housing </text><reference><text>for semiconductor lasers <class-ref scheme="cpc">H01S5/02208</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4263" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the transisitor outline [TO] can type</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4265" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the Butterfly or dual inline package [DIP] type</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4266" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Thermal aspects, temperature control or temperature monitoring </text><reference><text>thermal aspect of electrical circuits <class-ref scheme="cpc">H05K7/20</class-ref>, <class-ref scheme="cpc">H05K5/0213</class-ref>, temperature control in general <class-ref scheme="cpc">G05D23/19</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4267" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4267</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reduction of thermal stress, e.g. by selecting thermal coefficient of materials</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4268" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cooling </text><reference><text>of semiconductor devices <class-ref scheme="cpc">H01L23/24</class-ref>; of electric apparatus <class-ref scheme="cpc">H05K7/20</class-ref>; of instruments <class-ref scheme="cpc">G12B15/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4269" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4269</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with heat sinks or radiation fins</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4271" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4271</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with thermo electric cooling</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4272" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with mounting substrates of high thermal conductivity</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4273" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with heat insulation means to thermally decouple or restrain the heat from spreading</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4274" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4274</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrical aspects </text><reference><text><class-ref scheme="cpc">G02B6/4263</class-ref> and <class-ref scheme="cpc">G02B6/4265</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4275" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection against electrostatic discharge [ESD]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4277" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4277</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protection against electromagnetic interference [EMI], e.g. shielding means </text><reference><text>shielding of electric apparatus <class-ref scheme="cpc">H05K9/00</class-ref>, of instruments <class-ref scheme="cpc">G12B17/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4278" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>related to pluggable or demountable opto-electronic or electronic elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4279" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4279</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Radio frequency signal propagation aspects of the electrical connection, high frequency adaptations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/428" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/428</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>containing printed circuit boards [PCB]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4281" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4281</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the printed circuit boards being flexible </text><reference><text>in general <class-ref scheme="cpc">H05K1/147</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4283" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with electrical insulation means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4284" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of optical modules with disconnectable electrical connectors </text><reference><text>latching arms for electrical connectors <class-ref scheme="cpc">H01R13/627</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4285" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical modules characterised by a connectorised pigtail</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4286" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical modules with optical power monitoring</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4287" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4287</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical modules with tapping or launching means through the surface of the waveguide </text><reference><text><class-ref scheme="cpc">G02B6/2852</class-ref>, <class-ref scheme="cpc">G02B6/4286</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4289" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4289</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by inducing bending, microbending or macrobending, to the light guide</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/429" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/429</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by surface irregularities on the light guide, e.g. by mechanical modification of the surface of the light guide on its exterior</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4291" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4291</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by accessing the evanescent field of the light guide</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4292" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4292</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4293" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4293</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>hybrid electrical and optical connections for transmitting electrical and optical signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4295" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4295</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>coupling with semiconductor devices activated by light through the light guide, e.g. thyristors, phototransistors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4296" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4296</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B6/4297" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2006/4297</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having protection means, e.g. protecting humans against accidental exposure to harmful laser radiation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4298" definition-exists="false" ipc-concordant="G02B6/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>G02B6/4298</classification-symbol><class-title date-revised="2018-05-01"><title-part><CPC-specific-text><text>coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/43" definition-exists="true" ipc-concordant="G02B6/43" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B6/43</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B6/44" definition-exists="true" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables </text><reference><text>cables incorporating electric conductors and optical fibres </text><CPC-specific-text><text>where features relating to the optical fibres are not of interest</text></CPC-specific-text><text> <class-ref scheme="cpc">H01B11/22</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/4401" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4401</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical cables</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4402" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4402</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with one single optical waveguide </text><reference><text><class-ref scheme="cpc">G02B6/4429</class-ref>, <class-ref scheme="cpc">G02B6/4439</class-ref>, <class-ref scheme="cpc">G02B6/4479</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4403" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with ribbon structure </text><reference><text><class-ref scheme="cpc">G02B6/4429</class-ref>, <class-ref scheme="cpc">G02B6/4439</class-ref>, <class-ref scheme="cpc">G02B6/4479</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4404" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4404</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-podded</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4405" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4405</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with longitudinally spaced waveguide clamping </text><reference><text><class-ref scheme="cpc">G02B6/4429</class-ref>, <class-ref scheme="cpc">G02B6/4439</class-ref>, <class-ref scheme="cpc">G02B6/4479</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4407" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with internal fluted support member </text><reference><text><class-ref scheme="cpc">G02B6/4429</class-ref>, <class-ref scheme="cpc">G02B6/4439</class-ref>, <class-ref scheme="cpc">G02B6/4479</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4408" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4408</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Groove structures in support members to decrease or harmonise transmission losses in ribbon cables</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4409" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4409</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for ribbons</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/441" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/441</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>built up from sub-bundles </text><reference><text><class-ref scheme="cpc">G02B6/4429</class-ref>, <class-ref scheme="cpc">G02B6/4439</class-ref>, <class-ref scheme="cpc">G02B6/4479</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4411" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4411</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Matrix structure</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4413" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4413</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Helical structure</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4414" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4414</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with internal serpentine waveguides</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4415" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4415</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cables for special applications </text><reference><text><class-ref scheme="cpc">G02B6/4429</class-ref>, <class-ref scheme="cpc">G02B6/4439</class-ref>, <class-ref scheme="cpc">G02B6/4479</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4416" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4416</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heterogeneous cables</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4417" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4417</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>High voltage aspects, e.g. in cladding</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4419" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4419</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Preventing corona discharge</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/442" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/442</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Insulators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/4421" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4421</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Insulators with helical structure of optical fibre, e.g. fibres wound around insulators</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4422" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4422</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the overhead type</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4423" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electro-corrosion preventing means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4425" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Suppression of galloping oscillation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4426" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reducing drag caused by wired, e.g. by oval cross-section</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4427" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pressure resistant cables, e.g. undersea cables</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4428" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4428</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Penetrator systems in pressure-resistant devices</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4429" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4429</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Strengthening and protecting features </text><reference><text><class-ref scheme="cpc">G02B6/4492</class-ref>, <class-ref scheme="cpc">G02B6/4494</class-ref>, <class-ref scheme="cpc">G02B6/4496</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/443" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/443</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Protective covering</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4432" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4432</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with fibre reinforcements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4433" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4433</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Double reinforcement laying in straight line with optical transmission element</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4434" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4434</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Central member to take up tensile loads</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4435" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4435</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Corrugated mantle</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4436" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4436</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heat resistant</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4438" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4438</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>facilitating insertion by fluid drag in ducts or capillaries</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4439" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4439</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary devices</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/444" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/444</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems and boxes with surplus length</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4441" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4441</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>[Boxes]</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4442" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4442</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cap coupling boxes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/4444" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4444</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Seals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/4445" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Divided base plates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4446" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cableboxes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/4447" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4447</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with divided shells </text><reference><text><class-ref scheme="cpc">G02B6/4448</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/4448" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4448</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>electro-optic</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/445" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with lateral pivoting cover</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4451" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4451</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>underground connection boxes </text><reference><text><class-ref scheme="cpc">G02B6/4448</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4452" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4452</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distribution frames</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4453" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4453</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cassettes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4454" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4454</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with splices</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G02B6/4455" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4455</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the way of extraction or insertion of the cassette in the distribution frame, e.g. pivoting, sliding, rotating, gliding</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4457" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4457</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bobbins; Reels</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4458" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4458</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>coiled, e.g. extensible helix</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4459" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4459</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ducts; Conduits</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/446" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Desiccating features</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4461" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4461</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>articulated</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4463" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanical aspects of installing cables in ducts or the like </text><reference><text>methods or apparatus for laying electrical cables through tubing or conduit <class-ref scheme="cpc">H02G1/08</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4464" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4464</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by fluid drag </text><reference><text><class-ref scheme="cpc">G02B6/4466</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4465" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4465</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pulling eyes </text><reference><text><class-ref scheme="cpc">G02B6/4466</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4466" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for buildings</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4467" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4467</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Repair sets</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4469" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4469</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Security aspects</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/447" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/447</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>locatable, e.g. magnetic means </text><reference><text>detection of buried cables <class-ref scheme="cpc">G01V</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4471" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4471</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>terminating, fan-out, clamping, strain-relieving or like devices </text><reference><text>demountable connectors <class-ref scheme="cpc">G02B6/3807</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4472" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manifolds</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4473" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4473</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Three-way systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G02B6/4475" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4475</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for lateral branching </text><reference><text><class-ref scheme="cpc">G02B6/4495</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4476" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4476</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with heat-shrinkable elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4477" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4477</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Strain-relieving to interior strengths element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4478" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4478</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bending relief</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4479" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4479</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fabrication methods</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/448" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/448</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ribbon cables</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4482" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4482</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>code or colour marking</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4483" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Injection or filling devices </text><reference><text>hydrogen absorbing materials <class-ref scheme="cpc">G02B6/4492</class-ref>; water blocking or hydrophobic materials <class-ref scheme="cpc">G02B6/4494</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4484" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4484</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with desired surplus length between fibres and protection feature</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4485" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4485</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Installing in protective tubing by fluid drag</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4486" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4486</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>protective covering</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4488" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4488</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with metallic tube</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4489" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4489</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of central supporting member of lobe structure</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/449" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/449</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>twisting</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B6/4491" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4491</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a lobe structure</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4492" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4492</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided with hydrogen absorbing materials </text><reference><text><class-ref scheme="cpc">G02B6/4439</class-ref>, <class-ref scheme="cpc">G02B6/4479</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4494" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4494</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>provided with water blocking or hydrophobic materials </text><reference><text><class-ref scheme="cpc">G02B6/4439</class-ref>, <class-ref scheme="cpc">G02B6/4479</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4495" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4495</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision in the cable protection, e.g. weak line, for gaining access to one or more fibres, e.g. for branching or tapping </text><reference><text>break-out terminations <class-ref scheme="cpc">G02B6/4439</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4496" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4496</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Freeze-prevention means </text><reference><text><class-ref scheme="cpc">G02B6/4439</class-ref>, <class-ref scheme="cpc">G02B6/4479</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/4497" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4497</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Devices for opening or removing the mantle</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/4498" definition-exists="false" ipc-concordant="G02B6/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/4498</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for ribbon cables</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B6/46" definition-exists="true" ipc-concordant="G02B6/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Processes or apparatus adapted for installing optical fibres or optical cables </text><reference><text>installation of cables containing electric conductors and optical fibres <class-ref scheme="cpc">H02G</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/48" definition-exists="false" ipc-concordant="G02B6/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Overhead installation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/483" definition-exists="false" ipc-concordant="G02B6/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Installation of aerial type</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B6/486" definition-exists="false" ipc-concordant="G02B6/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/486</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by helical wrapping</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B6/50" definition-exists="false" ipc-concordant="G02B6/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Underground or underwater installation</text></title-part><title-part><text>Installation through tubing, conduits or ducts</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/502" definition-exists="false" ipc-concordant="G02B6/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/502</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Installation methods in fluid conducts, e.g. pipelines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/504" definition-exists="false" ipc-concordant="G02B6/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/504</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Installation in solid material, e.g. underground</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/506" definition-exists="false" ipc-concordant="G02B6/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/506</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Underwater installation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/508" definition-exists="false" ipc-concordant="G02B6/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/508</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fixation devices in ducts for drawing cables</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/52" definition-exists="false" ipc-concordant="G02B6/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using fluids, e.g. air</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B6/54" definition-exists="false" ipc-concordant="G02B6/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B6/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using mechanical means, e.g. pulling or pushing devices</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B7/00" definition-exists="true" ipc-concordant="G02B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mountings, adjusting means, or light-tight connections, for optical elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B7/001" definition-exists="false" ipc-concordant="G02B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Counterbalanced structures, e.g. surgical microscopes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B7/002" definition-exists="false" ipc-concordant="G02B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mounting on the human body</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B7/003" definition-exists="false" ipc-concordant="G02B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Alignment of optical elements </text><reference><text><class-ref scheme="cpc">G02B7/001</class-ref>, <class-ref scheme="cpc">G02B7/002</class-ref> take precedence; for mirrors <class-ref scheme="cpc">G02B7/1822</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/004" definition-exists="false" ipc-concordant="G02B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manual alignment, e.g. micromanipulators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/005" definition-exists="false" ipc-concordant="G02B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Motorised alignment</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B7/006" definition-exists="false" ipc-concordant="G02B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filter holders</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B7/007" definition-exists="false" ipc-concordant="G02B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pressure-resistant sight glasses</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B7/008" definition-exists="false" ipc-concordant="G02B7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B7/02" definition-exists="false" ipc-concordant="G02B7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for lenses </text><CPC-specific-text><reference><text>supports for magnifying lenses <class-ref scheme="cpc">G02B25/002</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/021" definition-exists="false" ipc-concordant="G02B7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for more than one lens</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/022" definition-exists="false" ipc-concordant="G02B7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>lens and mount having complementary engagement means, e.g. screw/thread</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/023" definition-exists="false" ipc-concordant="G02B7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>permitting adjustment</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/025" definition-exists="false" ipc-concordant="G02B7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using glue</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/026" definition-exists="false" ipc-concordant="G02B7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using retaining rings or springs </text><reference><text><class-ref scheme="cpc">G02B7/027</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/027" definition-exists="false" ipc-concordant="G02B7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the lens being in the form of a sphere or ball</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/028" definition-exists="false" ipc-concordant="G02B7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/04" definition-exists="false" ipc-concordant="G02B7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with mechanism for focusing or varying magnification</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/06" definition-exists="false" ipc-concordant="G02B7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Focusing binocular pairs</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/08" definition-exists="false" ipc-concordant="G02B7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>adapted to co-operate with a remote control mechanism</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/09" definition-exists="true" ipc-concordant="G02B7/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B7/09</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>adapted for automatic focusing or varying magnification</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/10" definition-exists="false" ipc-concordant="G02B7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by relative axial movement of several lenses, e.g. of varifocal objective lens</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B7/102" definition-exists="false" ipc-concordant="G02B7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlled by a microcomputer </text><reference><text>cameras with interchangeable lenses <class-ref scheme="cpc">G03B17/14</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B7/105" definition-exists="false" ipc-concordant="G02B7/105" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with movable lens means specially adapted for focusing at close distances</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/12" definition-exists="false" ipc-concordant="G02B7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adjusting pupillary distance of binocular pairs</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/14" definition-exists="false" ipc-concordant="G02B7/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>adapted to interchange lenses </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02B7/027</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/16" definition-exists="false" ipc-concordant="G02B7/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotatable turrets</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B7/18" definition-exists="false" ipc-concordant="G02B7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for prisms</text></title-part><title-part><text>for mirrors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/1805" definition-exists="false" ipc-concordant="G02B7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/1805</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for prisms </text><reference><text><class-ref scheme="cpc">G02B7/181</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/181" definition-exists="false" ipc-concordant="G02B7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/181</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/1815" definition-exists="false" ipc-concordant="G02B7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/1815</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with cooling or heating systems </text><reference><text>cooling arrangements for laser mirrors <class-ref scheme="cpc">H01S3/0401</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/182" definition-exists="true" ipc-concordant="G02B7/182" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B7/182</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>for mirrors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/1821" definition-exists="false" ipc-concordant="G02B7/182" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/1821</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for rotating or oscillating mirrors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/1822" definition-exists="false" ipc-concordant="G02B7/182" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/1822</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising means for aligning the optical axis </text><reference><text><class-ref scheme="cpc">G02B7/1821</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B7/1824" definition-exists="false" ipc-concordant="G02B7/182" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/1824</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manual alignment</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B7/1825" definition-exists="false" ipc-concordant="G02B7/182" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/1825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>made by screws, e.g. for laser mirrors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B7/1827" definition-exists="false" ipc-concordant="G02B7/182" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/1827</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Motorised alignment</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B7/1828" definition-exists="false" ipc-concordant="G02B7/182" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/1828</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using magnetic means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/183" definition-exists="false" ipc-concordant="G02B7/183" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for very large mirrors, e.g. for astronomy, </text><CPC-specific-text><text>or solar concentrators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/185" definition-exists="true" ipc-concordant="G02B7/185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B7/185</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>with means for adjusting the shape of the mirror surface</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B7/188" definition-exists="false" ipc-concordant="G02B7/188" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/188</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Membrane mirrors </text><CPC-specific-text><reference><text>not in use, <u>see</u> <class-ref scheme="cpc">G02B26/06</class-ref>, <class-ref scheme="cpc">G02B26/0825</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/192" definition-exists="false" ipc-concordant="G02B7/192" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/192</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means for minimising internal mirror stresses </text><CPC-specific-text><text>not in use</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B7/195" definition-exists="false" ipc-concordant="G02B7/195" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/195</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fluid-cooled mirrors </text><CPC-specific-text><reference><text>not in use, <u>see</u> <class-ref scheme="cpc">G02B7/181</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/198" definition-exists="false" ipc-concordant="G02B7/198" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G02B7/198</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>with means for adjusting the mirror relative to its support </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02B7/1822</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B7/20" definition-exists="false" ipc-concordant="G02B7/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Light-tight connections for movable optical elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/22" definition-exists="false" ipc-concordant="G02B7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Extensible connections, e.g. bellows</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/24" definition-exists="false" ipc-concordant="G02B7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pivoted connections</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B7/28" definition-exists="true" ipc-concordant="G02B7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B7/28</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Systems for automatic generation of focusing signals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/282" definition-exists="false" ipc-concordant="G02B7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Autofocusing of zoom lenses</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/285" definition-exists="false" ipc-concordant="G02B7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including two or more different focus detection devices, e.g. both an active and a passive focus detecting device</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/287" definition-exists="false" ipc-concordant="G02B7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/287</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including a sight line detecting device</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/30" definition-exists="false" ipc-concordant="G02B7/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using parallactic triangle with a base line</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/305" definition-exists="false" ipc-concordant="G02B7/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/305</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a scanner</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/32" definition-exists="false" ipc-concordant="G02B7/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using active means, e.g. light emitter </text><CPC-specific-text><reference><text>including both an active and a passive focus detecting device <class-ref scheme="cpc">G02B7/285</class-ref>; using ultrasound <class-ref scheme="cpc">G02B7/40</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/34" definition-exists="false" ipc-concordant="G02B7/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using different areas in a pupil plane</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/343" definition-exists="false" ipc-concordant="G02B7/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/343</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using light beam separating prisms</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/346" definition-exists="false" ipc-concordant="G02B7/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/346</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using horizontal and vertical areas in the pupil plane, i.e. wide area autofocusing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/36" definition-exists="false" ipc-concordant="G02B7/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>G02B7/36</classification-symbol><class-title date-revised="2023-01-01"><title-part><text>using image sharpness techniques </text><CPC-specific-text><text>, e.g. image processing techniques for generating autofocus signals </text><reference><text>image data processing <u>per se</u> <class-ref scheme="cpc">G06T</class-ref>; in cameras having a solid state image sensor <class-ref scheme="cpc">H04N23/67</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/365" definition-exists="false" ipc-concordant="G02B7/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/365</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by analysis of the spatial frequency components of the image</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B7/38" definition-exists="false" ipc-concordant="G02B7/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>measured at different points on the optical axis </text><CPC-specific-text><text>, e.g. focussing on two or more planes and comparing image data</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B7/40" definition-exists="false" ipc-concordant="G02B7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B7/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using time delay of the reflected waves, e.g. of ultrasonic waves</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B9/00" definition-exists="true" ipc-concordant="G02B9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - </text><reference><text><class-ref scheme="cpc">G02B15/00</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B9/02" definition-exists="false" ipc-concordant="G02B9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having one + component only </text><reference><text>simple lenses <class-ref scheme="cpc">G02B3/00</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B9/04" definition-exists="false" ipc-concordant="G02B9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having two components only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B9/06" definition-exists="false" ipc-concordant="G02B9/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>two + components</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B9/08" definition-exists="false" ipc-concordant="G02B9/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged about a stop</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B9/10" definition-exists="false" ipc-concordant="G02B9/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>one + and one - component</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B9/12" definition-exists="false" ipc-concordant="G02B9/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having three components only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B9/14" definition-exists="false" ipc-concordant="G02B9/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged + - +</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B9/16" definition-exists="false" ipc-concordant="G02B9/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>all the components being simple</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B9/18" definition-exists="false" ipc-concordant="G02B9/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>only one component having a compound lens </text><reference><text><class-ref scheme="cpc">G02B9/30</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B9/20" definition-exists="false" ipc-concordant="G02B9/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the rear component having the compound</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B9/22" definition-exists="false" ipc-concordant="G02B9/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the middle component having the compound</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B9/24" definition-exists="false" ipc-concordant="G02B9/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>two of the components having compound lenses </text><reference><text><class-ref scheme="cpc">G02B9/30</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B9/26" definition-exists="false" ipc-concordant="G02B9/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the front and rear components having compound lenses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B9/28" definition-exists="false" ipc-concordant="G02B9/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the middle and rear components having compound lenses</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B9/30" definition-exists="false" ipc-concordant="G02B9/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the middle component being a - compound meniscus having a + lens</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B9/32" definition-exists="false" ipc-concordant="G02B9/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the + lens being a meniscus</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B9/34" definition-exists="false" ipc-concordant="G02B9/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having four components only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B9/36" definition-exists="false" ipc-concordant="G02B9/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G02B9/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged + -- +</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> In sub-groups <class-ref scheme="cpc">G02B9/38</class-ref>, <class-ref scheme="cpc">G02B9/44</class-ref> - <class-ref scheme="cpc">G02B9/56</class-ref> the first mentioned applicable sub-group takes precedence over later-mentioned sub-groups. </note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B9/38" definition-exists="false" ipc-concordant="G02B9/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>both - components being meniscus</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B9/40" definition-exists="false" ipc-concordant="G02B9/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>one - component being compound</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B9/42" definition-exists="false" ipc-concordant="G02B9/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>two - components being compound</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B9/44" definition-exists="false" ipc-concordant="G02B9/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>both - components being biconcave</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B9/46" definition-exists="false" ipc-concordant="G02B9/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>one - component being compound</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B9/48" definition-exists="false" ipc-concordant="G02B9/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>two - components being compound</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B9/50" definition-exists="false" ipc-concordant="G02B9/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>both + components being meniscus</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B9/52" definition-exists="false" ipc-concordant="G02B9/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the rear + component being compound</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B9/54" definition-exists="false" ipc-concordant="G02B9/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the front + component being compound</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B9/56" definition-exists="false" ipc-concordant="G02B9/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>all components being simple lenses</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B9/58" definition-exists="false" ipc-concordant="G02B9/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged - + + -</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B9/60" definition-exists="false" ipc-concordant="G02B9/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having five components only</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B9/62" definition-exists="false" ipc-concordant="G02B9/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having six components only</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B9/64" definition-exists="false" ipc-concordant="G02B9/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B9/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having more than six components</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B13/00" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical objectives specially designed for the purposes specified below </text><reference><text>with variable magnification </text><CPC-specific-text><text>in general</text></CPC-specific-text><text> <class-ref scheme="cpc">G02B15/00</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Unless specified in the title of the subgroups, this group and its subgroups do not cover objectives comprising reflecting surfaces, which are covered by <class-ref scheme="cpc">G02B17/06</class-ref>, <class-ref scheme="cpc">G02B17/08</class-ref> and their subgroups </note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/0005" definition-exists="false" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/0005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having F-Theta characteristic </text><reference><text>scanning systems employing movable or deformable optical elements <class-ref scheme="cpc">G02B26/10</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/001" definition-exists="false" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras </text><reference><text><class-ref scheme="cpc">G02B23/243</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B13/0015" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/0015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the lens design</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B13/002" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02B13/002</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>having at least one aspherical surface</text></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>When classifying in this group, a lens is deemed to be a simple lens or a compound lens</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B13/0025" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having one lens only</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B13/003" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having two lenses</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B13/0035" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/0035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having three lenses</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B13/004" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having four lenses</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B13/0045" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having five or more lenses</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B13/005" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having spherical lenses only</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B13/0055" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/0055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>employing a special optical element</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B13/006" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at least one element being a compound optical element, e.g. cemented elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B13/0065" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/0065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a beam-folding prism or mirror</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B13/007" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the beam folding prism having at least one curved surface</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B13/0075" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having an element with variable optical properties</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B13/008" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>designed for infrared light</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B13/0085" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02B13/0085</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>employing wafer level optics</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B13/009" definition-exists="true" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G02B13/009</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>having zoom function</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/0095" definition-exists="false" ipc-concordant="G02B13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/0095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Relay lenses or rod lenses </text><reference><text>in instruments for viewing the inside of hollow bodies <class-ref scheme="cpc">G02B23/2446</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/02" definition-exists="false" ipc-concordant="G02B13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/04" definition-exists="false" ipc-concordant="G02B13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Reversed telephoto objectives</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/06" definition-exists="true" ipc-concordant="G02B13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Panoramic objectives</text></title-part><title-part><text>So-called "sky lenses" </text><CPC-specific-text><text>including panoramic objectives having reflecting surfaces</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/08" definition-exists="false" ipc-concordant="G02B13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anamorphotic objectives</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B13/10" definition-exists="false" ipc-concordant="G02B13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving prisms </text><reference><text><class-ref scheme="cpc">G02B13/12</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B13/12" definition-exists="false" ipc-concordant="G02B13/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with variable magnification</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/14" definition-exists="false" ipc-concordant="G02B13/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for use with infra-red or ultra-violet radiation </text><reference><CPC-specific-text><text><class-ref scheme="cpc">G02B13/008</class-ref>, </text></CPC-specific-text><text> <class-ref scheme="cpc">G02B13/16</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B13/143" definition-exists="false" ipc-concordant="G02B13/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with ultra-violet radiation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B13/146" definition-exists="false" ipc-concordant="G02B13/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with corrections for use in multiple wavelength bands, such as infra-red and visible light, e.g. FLIR systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/16" definition-exists="false" ipc-concordant="G02B13/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for use in conjunction with image converters or intensifiers </text><CPC-specific-text><text>, or for use with projectors, e.g. objectives for projection TV</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/18" definition-exists="false" ipc-concordant="G02B13/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B13/18</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02B13/002</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/20" definition-exists="true" ipc-concordant="G02B13/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B13/20</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Soft-focus objectives</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/22" definition-exists="false" ipc-concordant="G02B13/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Telecentric objectives or lens systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B13/24" definition-exists="false" ipc-concordant="G02B13/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for reproducing or copying at short object distances</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B13/26" definition-exists="false" ipc-concordant="G02B13/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B13/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for reproducing with unit magnification</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B15/00" definition-exists="true" ipc-concordant="G02B15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B15/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical objectives with means for varying the magnification </text><reference><text>anamorphotic objectives <class-ref scheme="cpc">G02B13/08</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B15/02" definition-exists="false" ipc-concordant="G02B15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B15/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by changing, adding, or subtracting a part of the objective, e.g. convertible objective</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B15/04" definition-exists="false" ipc-concordant="G02B15/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B15/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by changing a part</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/06" definition-exists="false" ipc-concordant="G02B15/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B15/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by changing the front part</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/08" definition-exists="false" ipc-concordant="G02B15/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B15/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by changing the rear part</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B15/10" definition-exists="false" ipc-concordant="G02B15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B15/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by adding a part, e.g. close-up attachment</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/12" definition-exists="false" ipc-concordant="G02B15/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B15/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by adding telescopic attachments </text><reference><text><class-ref scheme="cpc">G02B15/14</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B15/14" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B15/142" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/142</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>having two groups only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/1421" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/1421</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>the first group being positive</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/1425" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/1425</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>the first group being negative</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B15/143" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/143</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>having three groups only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/1431" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/1431</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>the first group being positive</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/143101" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G02B15/143101</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged +--</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/143103" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G02B15/143103</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged ++-</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/143105" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G02B15/143105</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged +-+</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/143107" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G02B15/143107</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged +++</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/1435" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/1435</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>the first group being negative</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/143501" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G02B15/143501</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged ---</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/143503" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G02B15/143503</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged -+-</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/143505" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G02B15/143505</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged --+</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/143507" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G02B15/143507</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged -++</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B15/144" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/144</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>having four groups only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/1441" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G02B15/1441</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>the first group being positive</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/144101" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/144101</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged +---</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/145523" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/145523</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged -++-+</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/145525" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/145525</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged ---++</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/145527" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/145527</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged -+-++</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/145529" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/145529</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged --+++</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/145531" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/145531</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>arranged -++++</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B15/146" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/146</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>having more than five groups</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/1461" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/1461</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>the first group being positive</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/1465" definition-exists="false" ipc-concordant="G02B15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G02B15/1465</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>the first group being negative</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B15/15" definition-exists="false" ipc-concordant="G02B15/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>compensation by means of only one movement or by means of only linearly related movements, e.g. optical compensation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B15/16" definition-exists="false" ipc-concordant="G02B15/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group </text><reference><text><class-ref scheme="cpc">G02B15/22</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/163" definition-exists="false" ipc-concordant="G02B15/163" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/163</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group </text><reference><text><class-ref scheme="cpc">G02B15/177</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/167" definition-exists="false" ipc-concordant="G02B15/167" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/167</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having an additional fixed front lens or group of lenses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B15/17" definition-exists="false" ipc-concordant="G02B15/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged +--</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B15/173" definition-exists="false" ipc-concordant="G02B15/173" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/173</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged +-+</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/177" definition-exists="false" ipc-concordant="G02B15/177" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/177</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a negative front lens or group of lenses</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/20" definition-exists="false" ipc-concordant="G02B15/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G02B15/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having an additional movable lens or lens group for varying the objective focal length</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B15/22" definition-exists="false" ipc-concordant="G02B15/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B15/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with movable lens means specially adapted for focusing at close distances</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B15/24" definition-exists="false" ipc-concordant="G02B15/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B15/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a front fixed lens or lens group and two movable lenses or lens groups in front of a fixed lens or lens group</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/26" definition-exists="false" ipc-concordant="G02B15/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B15/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged +--</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B15/28" definition-exists="false" ipc-concordant="G02B15/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B15/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged +-+</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B17/00" definition-exists="true" ipc-concordant="G02B17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B17/00</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Systems with reflecting surfaces, with or without refracting elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B17/002" definition-exists="true" ipc-concordant="G02B17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrays of reflective systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B17/004" definition-exists="true" ipc-concordant="G02B17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems comprising a plurality of reflections between two or more surfaces, e.g. cells, resonators </text><reference><text>multipass arrangements for optical cuvettes <class-ref scheme="cpc">G01N21/031</class-ref>; laser resonators <class-ref scheme="cpc">H01S3/05</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B17/006" definition-exists="true" ipc-concordant="G02B17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems in which light light is reflected on a plurality of parallel surfaces, e.g. louvre mirrors, total internal reflection [TIR] lenses </text><reference><text>Fresnel mirrors <class-ref scheme="cpc">G02B5/09</class-ref>, Fresnel lenses <class-ref scheme="cpc">G02B3/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B17/008" definition-exists="true" ipc-concordant="G02B17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems specially adapted to form image relays or chained systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B17/02" definition-exists="true" ipc-concordant="G02B17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Catoptric systems, e.g. image erecting and reversing system</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/023" definition-exists="true" ipc-concordant="G02B17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for extending or folding an optical path, e.g. delay lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/026" definition-exists="true" ipc-concordant="G02B17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having static image erecting or reversing properties only </text><reference><text><class-ref scheme="cpc">G02B17/045</class-ref> takes precedence; optical derotators <class-ref scheme="cpc">G02B27/642</class-ref>; optical devices for controlling the direction of light using movable or deformable optical elements <class-ref scheme="cpc">G02B26/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/04" definition-exists="true" ipc-concordant="G02B17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using prisms only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/045" definition-exists="true" ipc-concordant="G02B17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having static image erecting or reversing properties only </text><reference><text>optical derotators <class-ref scheme="cpc">G02B27/642</class-ref>; optical devices for controlling the direction of light using movable or deformable optical elements <class-ref scheme="cpc">G02B26/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/06" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G02B17/06</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>using mirrors only </text><CPC-specific-text><text>, i.e. having only one curved mirror </text><reference><text>used in non-imaging applications <class-ref scheme="cpc">G02B19/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0605" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using two curved mirrors </text><reference><text><class-ref scheme="cpc">G02B17/0668</class-ref>, <class-ref scheme="cpc">G02B17/0694</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/061" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on-axis systems with at least one of the mirrors having a central aperture</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/0615" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0615</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>off-axis or unobscured systems in wich all of the mirrors share a common axis of rotational symmetry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/0621" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0621</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>off-axis or unobscured systems in which not all of the mirrors share a common axis of rotational symmetry, e.g. at least one of the mirrors is warped, tilted or decentered with respect to the other elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0626" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0626</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using three curved mirrors </text><reference><text><class-ref scheme="cpc">G02B17/0668</class-ref>, <class-ref scheme="cpc">G02B17/0694</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/0631" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0631</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on-axis systems with at least one of the mirrors having a central aperture</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/0636" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0636</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>off-axis or unobscured systems in which all of the mirrors share a common axis of rotational symmetry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/0642" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0642</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>off-axis or unobscured systems in which not all of the mirrors share a common axis of rotational symmetry, e.g. at least one of the mirrors is warped, tilted or decentered with respect to the other elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0647" definition-exists="false" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0647</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using more than three curved mirrors </text><reference><text><class-ref scheme="cpc">G02B17/0668</class-ref>, <class-ref scheme="cpc">G02B17/0694</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/0652" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0652</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on-axis systems with at least one of the mirrors having a central aperture</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/0657" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0657</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>off-axis or unobscured systems in which all of the mirrors share a common axis of rotational symmetry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/0663" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0663</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>off-axis or unobscured systems in which not all of the mirrors share a common axis of rotational symmetry, e.g. at least one of the mirrors is warped, tilted or decentered with respect to the other elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0668" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B17/0668</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having non-imaging properties</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/0673" definition-exists="false" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0673</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for light condensing, e.g. for use with a light emitter </text><reference><text>details of lighting devices in general <class-ref scheme="cpc">F21V</class-ref>; semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission <class-ref scheme="cpc">H01L33/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B17/0678" definition-exists="false" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0678</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted to emit light in a 360° plane or hemisphere</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/0684" definition-exists="false" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0684</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for light collecting, e.g. for use with a detector</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B17/0689" definition-exists="false" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0689</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted to receive light from a 360° plane or hemisphere</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0694" definition-exists="true" ipc-concordant="G02B17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0694</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with variable magnification or multiple imaging planes, including multispectral systems </text><reference><text>systems with only refractive elements <class-ref scheme="cpc">G02B15/14</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B17/08" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Catadioptric systems </text><CPC-specific-text><reference><text>used in non-imaging applications <class-ref scheme="cpc">G02B19/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/0804" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>G02B17/0804</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using two curved mirrors </text><reference><text><class-ref scheme="cpc">G02B17/0864</class-ref>, <class-ref scheme="cpc">G02B17/0896</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0808" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on-axis systems with at least one of the mirrors having a central aperture</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0812" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0812</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>off-axis or unobscured systems in which all of the mirrors share a common axis of rotational symmetry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0816" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>off-axis or unobscured systems in which not all of the mirrors share a common axis of rotational symmetry, e.g. at least one of the mirrors is warped, tilted or decentered with respect to the other elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/082" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using three curved mirrors </text><reference><text><class-ref scheme="cpc">G02B17/0864</class-ref>, <class-ref scheme="cpc">G02B17/0896</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0824" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0824</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on-axis systems with at least one of the mirrors having a central aperture</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0828" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0828</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>off-axis or unobscured systems in which all of the mirrors share a common axis of rotational symmetry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0832" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0832</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>off-axis or unobscured systems in which not all of the mirrors share a common axis of rotational symmetry, e.g. at least one of the mirrors is warped, tilted or decentered with respect to the other elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/0836" definition-exists="false" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0836</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using more than three curved mirrors </text><reference><text><class-ref scheme="cpc">G02B17/0864</class-ref>, <class-ref scheme="cpc">G02B17/0896</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/084" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>on-axis systems with at least one of the mirrors having a central aperture</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0844" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0844</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>off-axis or unobscured systems in which all of the mirrors share a common axis of rotational symmetry</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0848" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0848</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>off-axis or unobscured systems in which not all of the mirrors share a common axis of rotational symmetry, e.g. at least one of the mirrors is warped, tilted or decentered with respect to the other elements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/0852" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0852</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a field corrector only</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/0856" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0856</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/086" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the system is made of a single block of optical material, e.g. solid catadioptric systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/0864" definition-exists="false" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B17/0864</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having non-imaging properties</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0868" definition-exists="false" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0868</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for light condensing, e.g. for use with a light emitter </text><reference><text>details of lighting devices in general <class-ref scheme="cpc">F21V</class-ref>; semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission <class-ref scheme="cpc">H01L33/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/0872" definition-exists="false" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted to emit light in a 360° plane or hemisphere</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0876" definition-exists="false" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0876</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for light collecting, e.g. for use with a detector</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B17/088" definition-exists="false" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted to receive light from a 360° plane or hemisphere</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/0884" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0884</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a pupil corrector</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B17/0888" definition-exists="true" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0888</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the corrector having at least one aspheric surface, e.g. Schmidt plates</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/0892" definition-exists="false" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0892</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for the UV</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B17/0896" definition-exists="false" ipc-concordant="G02B17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B17/0896</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with variable magnification or multiple imaging planes, including multispectral systems </text><reference><text>systems with only refractive elements <class-ref scheme="cpc">G02B15/14</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B19/00" definition-exists="true" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B19/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Condensers, </text><CPC-specific-text><text>e.g. light collectors or similar non-imaging optics</text></CPC-specific-text><reference><text>for microscopes <class-ref scheme="cpc">G02B21/08</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B19/0004" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the optical means employed</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B19/0009" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having refractive surfaces only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B19/0014" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at least one surface having optical power</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B19/0019" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having reflective surfaces only (e.g. louvre systems, systems with multiple planar reflectors)</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B19/0023" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at least one surface having optical power</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B19/0028" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>refractive and reflective surfaces, e.g. non-imaging catadioptric systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B19/0033" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the use</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B19/0038" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with ambient light </text><reference><text><class-ref scheme="cpc">G02B19/009</class-ref>, <class-ref scheme="cpc">G02B19/0095</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B19/0042" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with direct solar radiation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B19/0047" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with a light source </text><reference><text><class-ref scheme="cpc">G02B19/009</class-ref>, <class-ref scheme="cpc">G02B19/0095</class-ref> take precedence; details of lighting devices in general <class-ref scheme="cpc">F21V</class-ref>; non-semiconductor lasers having optical devices external to the laser cavity <class-ref scheme="cpc">H01S3/005</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B19/0052" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the light source comprising a laser diode </text><reference><text>coupling into light guides using intermediate optical elements <class-ref scheme="cpc">G02B6/4204</class-ref>; semiconductor lasers having optical devices external to the laser cavity <class-ref scheme="cpc">H01S5/005</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B19/0057" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in the form of a laser diode array, e.g. laser diode bar </text><reference><text>semiconductor laser arrays with beam combining arrangement <class-ref scheme="cpc">H01S5/4012</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B19/0061" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the light source comprising a LED </text><reference><text>semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission <class-ref scheme="cpc">H01L33/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B19/0066" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in the form of an LED array</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B19/0071" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted to illuminate a complete hemisphere or a plane extending 360 degrees around the source</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B19/0076" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with a detector </text><reference><text><class-ref scheme="cpc">G02B19/009</class-ref>, <class-ref scheme="cpc">G02B19/0095</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B19/008" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted to collect light from a complete hemisphere or a plane extending 360 degrees around the detector</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B19/0085" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G02B19/0085</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>for use with both a detector and a source </text><reference><text>, e.g. in a transceiver, <class-ref scheme="cpc">G02B19/009</class-ref>, <class-ref scheme="cpc">G02B19/0095</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B19/009" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with infra-red radiation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B19/0095" definition-exists="false" ipc-concordant="G02B19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B19/0095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with ultra-violet radiation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B21/00" definition-exists="true" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B21/00</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Microscopes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B21/0004" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for specific applications</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/0008" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Microscopes having a simple construction, e.g. portable microscopes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/0012" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Surgical microscopes </text><reference><text>counterbalanced structures for surgical microscopes <class-ref scheme="cpc">G02B7/001</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/0016" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Technical microscopes, e.g. for inspection or measuring in industrial production processes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/002" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Scanning microscopes </text><reference><text>scanning near field optical microscopes <class-ref scheme="cpc">G01Q60/18</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B21/0024" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Confocal scanning microscopes (CSOMs) or confocal "macroscopes"; Accessories which are not restricted to use with CSOMs, e.g. sample holders</text></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Objective revolvers or the like are classified in other groups of <class-ref scheme="cpc">G02B21/00</class-ref></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B21/0028" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted for specific applications, e.g. for endoscopes, ophthalmoscopes, attachments to conventional microscopes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B21/0032" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G02B21/0032</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>Optical details of illumination, e.g. light-sources, pinholes, beam splitters, slits, fibers </text><reference><text><class-ref scheme="cpc">G02B21/0036</class-ref> - <class-ref scheme="cpc">G02B21/008</class-ref>; means for illumination of specimens in general <class-ref scheme="cpc">G02B21/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B21/0036" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Scanning details, e.g. scanning stages</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B21/004" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>fixed arrays, e.g. switchable aperture arrays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B21/0044" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>moving apertures, e.g. Nipkow disks, rotating lens arrays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B21/0048" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>scanning mirrors, e.g. rotating or galvanomirrors, MEMS mirrors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B21/0052" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical details of the image generation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B21/0056" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0056</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on optical coherence, e.g. phase-contrast arrangements, interference arrangements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B21/006" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>focusing arrangements; selection of the plane to be imaged</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B21/0064" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>multi-spectral or wavelength-selective arrangements, e.g. wavelength fan-out, chromatic profiling </text><reference><text><class-ref scheme="cpc">G02B21/0076</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B21/0068" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arrangements using polarisation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B21/0072" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>details concerning resolution or correction, including general design of CSOM objectives</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B21/0076" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>arrangements using fluorescence or luminescence</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B21/008" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of detection or image processing, including general computer control</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B21/0084" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>time-scale detection, e.g. strobed, ultra-fast, heterodyne detection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/0088" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inverse microscopes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/0092" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B21/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Polarisation microscopes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B21/0096" definition-exists="false" ipc-concordant="G02B21/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/0096</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with photometer devices </text><reference><text>photometers <u>per se</u> <class-ref scheme="cpc">G01J</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B21/02" definition-exists="false" ipc-concordant="G02B21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Objectives</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/025" definition-exists="false" ipc-concordant="G02B21/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with variable magnification </text><reference><text>variable magnification <class-ref scheme="cpc">G02B15/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/04" definition-exists="false" ipc-concordant="G02B21/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving mirrors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B21/06" definition-exists="false" ipc-concordant="G02B21/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for illuminating specimens</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/08" definition-exists="false" ipc-concordant="G02B21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Condensers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B21/082" definition-exists="false" ipc-concordant="G02B21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for incident illumination only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B21/084" definition-exists="false" ipc-concordant="G02B21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having annular illumination around the objective</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B21/086" definition-exists="false" ipc-concordant="G02B21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for transillumination only</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B21/088" definition-exists="false" ipc-concordant="G02B21/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for both incident illumination and transillumination</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B21/10" definition-exists="false" ipc-concordant="G02B21/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>affording dark-field illumination </text><reference><text><class-ref scheme="cpc">G02B21/14</class-ref> </text><CPC-specific-text><text>and <class-ref scheme="cpc">G02B21/125</class-ref></text></CPC-specific-text><text> take precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B21/12" definition-exists="false" ipc-concordant="G02B21/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>affording bright-field illumination </text><reference><text><class-ref scheme="cpc">G02B21/14</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B21/125" definition-exists="false" ipc-concordant="G02B21/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>affording both dark- and bright-field illumination</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B21/14" definition-exists="false" ipc-concordant="G02B21/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>affording illumination for phase-contrast observation</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B21/16" definition-exists="false" ipc-concordant="G02B21/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B21/16</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>adapted for ultra-violet illumination </text><CPC-specific-text><text>; Fluorescence microscopes </text><reference><text><class-ref scheme="cpc">G02B21/0076</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B21/18" definition-exists="false" ipc-concordant="G02B21/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements with more than one light path, e.g. for comparing two specimens</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/20" definition-exists="false" ipc-concordant="G02B21/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Binocular arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B21/22" definition-exists="false" ipc-concordant="G02B21/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Stereoscopic arrangements</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B21/24" definition-exists="false" ipc-concordant="G02B21/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Base structure</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/241" definition-exists="false" ipc-concordant="G02B21/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/241</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Devices for focusing </text><reference><text>focusing in general <class-ref scheme="cpc">G02B7/28</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B21/242" definition-exists="false" ipc-concordant="G02B21/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with coarse and fine adjustment mechanism</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B21/244" definition-exists="false" ipc-concordant="G02B21/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using image analysis techniques</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B21/245" definition-exists="false" ipc-concordant="G02B21/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using auxiliary sources, detectors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B21/247" definition-exists="false" ipc-concordant="G02B21/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Differential detectors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/248" definition-exists="false" ipc-concordant="G02B21/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/248</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>objective (or ocular) turrets</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/26" definition-exists="false" ipc-concordant="G02B21/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Stages</text></title-part><title-part><text>Adjusting means therefor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/28" definition-exists="false" ipc-concordant="G02B21/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with cooling device</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/30" definition-exists="false" ipc-concordant="G02B21/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with heating device</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B21/32" definition-exists="false" ipc-concordant="G02B21/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Micromanipulators structurally combined with microscopes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B21/33" definition-exists="false" ipc-concordant="G02B21/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B21/33</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Immersion oils </text><CPC-specific-text><text>, or microscope systems or objectives for use with immersion fluids</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B21/34" definition-exists="true" ipc-concordant="G02B21/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B21/34</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Microscope slides, e.g. mounting specimens on microscope slides</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B21/36" definition-exists="false" ipc-concordant="G02B21/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>arranged for photographic purposes or projection purposes </text><reference><text><class-ref scheme="cpc">G02B21/18</class-ref> takes precedence</text></reference><CPC-specific-text><text>or digital imaging or video purposes including associated control and data processing arrangements </text><reference><text>image data processing <u>per se</u> <class-ref scheme="cpc">G06T</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/361" definition-exists="false" ipc-concordant="G02B21/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/361</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical details, e.g. image relay to the camera or image sensor </text><reference><text><class-ref scheme="cpc">G02B21/364</class-ref> takes precedence; illumination details <class-ref scheme="cpc">G02B21/06</class-ref> and subgroups</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/362" definition-exists="false" ipc-concordant="G02B21/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/362</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanical details, e.g. mountings for the camera or image sensor, housings </text><reference><text><class-ref scheme="cpc">G02B21/364</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/364" definition-exists="false" ipc-concordant="G02B21/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/364</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Projection microscopes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/365" definition-exists="false" ipc-concordant="G02B21/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/365</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control or image processing arrangements for digital or video microscopes </text><reference><text><class-ref scheme="cpc">G02B21/361</class-ref>, <class-ref scheme="cpc">G02B21/362</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B21/367" definition-exists="false" ipc-concordant="G02B21/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/367</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>providing an output produced by processing a plurality of individual source images, e.g. image tiling, montage, composite images, depth sectioning, image comparison</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B21/368" definition-exists="false" ipc-concordant="G02B21/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B21/368</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>details of associated display arrangements, e.g. mounting of LCD monitor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B23/00" definition-exists="true" ipc-concordant="G02B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B23/00</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Telescopes, e.g. binoculars</text></title-part><title-part><text>Periscopes</text></title-part><title-part><text>Instruments for viewing the inside of hollow bodies</text></title-part><title-part><text>Viewfinders</text></title-part><title-part><text>Optical aiming or sighting devices</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B23/02" definition-exists="false" ipc-concordant="G02B23/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving prisms or mirrors </text><reference><text><class-ref scheme="cpc">G02B23/14</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/04" definition-exists="false" ipc-concordant="G02B23/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for the purpose of beam splitting or combining, e.g. fitted with eyepieces for more than one observer </text><reference><text><class-ref scheme="cpc">G02B23/10</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/06" definition-exists="false" ipc-concordant="G02B23/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a focussing action, e.g. parabolic mirror</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/08" definition-exists="false" ipc-concordant="G02B23/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Periscopes </text><CPC-specific-text><reference><text>arrangements on floating structures of underwater viewing devices <class-ref scheme="cpc">B63C11/49</class-ref>; arrangement of visual watch equipment on submarines <class-ref scheme="cpc">B63G8/38</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/10" definition-exists="true" ipc-concordant="G02B23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B23/10</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>reflecting into the field of view additional indications, e.g. from collimator</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B23/105" definition-exists="false" ipc-concordant="G02B23/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sighting devices with light source and collimating reflector </text><reference><text>reflecting sights for small arms having light source <class-ref scheme="cpc">F41G1/34</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B23/12" definition-exists="true" ipc-concordant="G02B23/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B23/12</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>with means for image conversion or intensification</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/125" definition-exists="false" ipc-concordant="G02B23/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>head-mounted</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B23/14" definition-exists="false" ipc-concordant="G02B23/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Viewfinders </text><reference><text>for photographic apparatus <class-ref scheme="cpc">G03B13/02</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/145" definition-exists="false" ipc-concordant="G02B23/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Zoom viewfinders</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B23/16" definition-exists="true" ipc-concordant="G02B23/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B23/16</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Housings</text></title-part><title-part><text>Caps</text></title-part><title-part><text>Mountings</text></title-part><title-part><text>Supports, e.g. with counterweight</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/165" definition-exists="false" ipc-concordant="G02B23/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Equatorial mounts</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/18" definition-exists="false" ipc-concordant="G02B23/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for binocular arrangements </text><CPC-specific-text><reference><text>focusing binocular pairs <class-ref scheme="cpc">G02B7/06</class-ref>; adjusting pupillary distance of binocular pairs <class-ref scheme="cpc">G02B7/12</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/20" definition-exists="false" ipc-concordant="G02B23/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Collapsible housings </text><reference><text><class-ref scheme="cpc">G02B23/18</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/22" definition-exists="false" ipc-concordant="G02B23/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Underwater equipment </text><CPC-specific-text><reference><text>for submarine periscopes <class-ref scheme="cpc">G02B23/08</class-ref>; arrangements on floating structures of underwater viewing devices <class-ref scheme="cpc">B63C11/49</class-ref>; arrangement of visual watch equipment on submarines <class-ref scheme="cpc">B63G8/38</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This group <u>covers</u> housings, mountings, supports or the like for underwater equipment other than periscopes</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B23/24" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Instruments </text><CPC-specific-text><text>or systems</text></CPC-specific-text><text> for viewing the inside of hollow bodies, e.g. fibrescopes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/2407" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/2407</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B23/2415" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/2415</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stereoscopic endoscopes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B23/2423" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/2423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the distal end</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B23/243" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/243</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Objectives for endoscopes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B23/2438" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/2438</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Zoom objectives</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B23/2446" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/2446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the image relay </text><reference><text><class-ref scheme="cpc">G02B23/26</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B23/2453" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/2453</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of the proximal end</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B23/2461" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/2461</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Illumination</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B23/2469" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/2469</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using optical fibres</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/2476" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/2476</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Non-optical details, e.g. housings, mountings, supports</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B23/2484" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>G02B23/2484</classification-symbol><class-title date-revised="2023-01-01"><title-part><CPC-specific-text><text>Arrangements in relation to a camera or imaging device </text><reference><text>processing or control of video signals generated by an endoscope <class-ref scheme="cpc">H04N23/60</class-ref>, <class-ref scheme="cpc">H04N23/70</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B23/2492" definition-exists="false" ipc-concordant="G02B23/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/2492</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for use in a hostile environment, e.g. a very hot, cold or radioactive environment</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B23/26" definition-exists="false" ipc-concordant="G02B23/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B23/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using light guides </text><CPC-specific-text><reference><text>for illumination <class-ref scheme="cpc">G02B23/2469</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B25/00" definition-exists="true" ipc-concordant="G02B25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B25/00</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Eyepieces</text></title-part><title-part><text>Magnifying glasses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B25/001" definition-exists="false" ipc-concordant="G02B25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B25/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Eyepieces</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B25/002" definition-exists="false" ipc-concordant="G02B25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B25/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Magnifying glasses</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B25/004" definition-exists="false" ipc-concordant="G02B25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B25/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having binocular arrangement</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B25/005" definition-exists="false" ipc-concordant="G02B25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B25/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for adjusting the magnifying glass or the object viewed </text><reference><text><class-ref scheme="cpc">G02B25/004</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B25/007" definition-exists="false" ipc-concordant="G02B25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B25/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising other optical elements than lenses </text><reference><text><class-ref scheme="cpc">G02B25/004</class-ref>, <class-ref scheme="cpc">G02B25/005</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B25/008" definition-exists="false" ipc-concordant="G02B25/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>G02B25/008</classification-symbol><class-title date-revised="2016-05-01"><title-part><CPC-specific-text><text>comprising two or more lenses </text><reference><text><class-ref scheme="cpc">G02B25/004</class-ref> - <class-ref scheme="cpc">G02B25/007</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B25/02" definition-exists="false" ipc-concordant="G02B25/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B25/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means for illuminating object viewed</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B25/04" definition-exists="false" ipc-concordant="G02B25/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B25/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>affording a wide-angle view, e.g. through a spy-hole</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B26/00" definition-exists="true" ipc-concordant="G02B26/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B26/00</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Optical devices or arrangements for the control of light using movable or deformable optical elements </text><reference><text>control of light by modification of the optical properties of the media of the elements involved therein <class-ref scheme="cpc">G02F1/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B26/001" definition-exists="true" ipc-concordant="G02B26/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on interference in an adjustable optical cavity </text><reference><text>interference filters <class-ref scheme="cpc">G02B5/28</class-ref>; devices or arrangements using multiple reflections in spectrometry or monochromators <class-ref scheme="cpc">G01J3/26</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B26/002" definition-exists="false" ipc-concordant="G02B26/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the movement or the deformation controlling the frequency of light, e.g. by Doppler effect</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B26/004" definition-exists="false" ipc-concordant="G02B26/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on a displacement or a deformation of a fluid</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B26/005" definition-exists="false" ipc-concordant="G02B26/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on electrowetting</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B26/007" definition-exists="false" ipc-concordant="G02B26/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B26/008" definition-exists="false" ipc-concordant="G02B26/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in the form of devices for effecting sequential colour changes, e.g. colour wheels</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B26/02" definition-exists="false" ipc-concordant="G02B26/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for controlling the intensity of light </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G02B26/004</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B26/023" definition-exists="false" ipc-concordant="G02B26/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising movable attenuating elements, e.g. neutral density filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B26/026" definition-exists="true" ipc-concordant="G02B26/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on the rotation of particles under the influence of an external field, e.g. gyricons, twisting ball displays </text><reference><text>based on orientable dipolar particles <class-ref scheme="cpc">G02F1/172</class-ref>; based on electrophoresis <class-ref scheme="cpc">G02F1/167</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B26/04" definition-exists="false" ipc-concordant="G02B26/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by periodically varying the intensity of light, e.g. using choppers </text><reference><text>shutters, diaphragms for cameras <class-ref scheme="cpc">G03B9/00</class-ref>; devices for eliminating or reducing the effect of flicker in projection systems <class-ref scheme="cpc">G03B21/40</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B26/06" definition-exists="false" ipc-concordant="G02B26/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for controlling the phase of light </text><reference><text><class-ref scheme="cpc">G02B26/08</class-ref> takes precedence </text><CPC-specific-text><text>, measuring optical phase difference <class-ref scheme="cpc">G01J9/00</class-ref></text></CPC-specific-text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B26/08" definition-exists="false" ipc-concordant="G02B26/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for controlling the direction of light </text><reference><text>in light guides <class-ref scheme="cpc">G02B6/35</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B26/0808" definition-exists="false" ipc-concordant="G02B26/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/0808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of one or more diffracting elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B26/0816" definition-exists="false" ipc-concordant="G02B26/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/0816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of one or more reflecting elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B26/0825" definition-exists="false" ipc-concordant="G02B26/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/0825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the reflecting element being a flexible sheet or membrane, e.g. for varying the focus </text><reference><text>flexible mirrors for cosmetic use <class-ref scheme="cpc">A45D42/24</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B26/0833" definition-exists="true" ipc-concordant="G02B26/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/0833</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD </text><reference><text><class-ref scheme="cpc">G02B26/0825</class-ref> takes precedence; micromechanical devices in general <class-ref scheme="cpc">B81B</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B26/0841" definition-exists="false" ipc-concordant="G02B26/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/0841</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the reflecting element being moved or deformed by electrostatic means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B26/085" definition-exists="false" ipc-concordant="G02B26/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the reflecting means being moved or deformed by electromagnetic means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B26/0858" definition-exists="false" ipc-concordant="G02B26/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/0858</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the reflecting means being moved or deformed by piezoelectric means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B26/0866" definition-exists="false" ipc-concordant="G02B26/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/0866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the reflecting means being moved or deformed by thermal means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B26/0875" definition-exists="false" ipc-concordant="G02B26/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/0875</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by means of one or more refracting elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B26/0883" definition-exists="false" ipc-concordant="G02B26/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/0883</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the refracting element being a prism</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B26/0891" definition-exists="false" ipc-concordant="G02B26/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/0891</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>forming an optical wedge</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B26/10" definition-exists="true" ipc-concordant="G02B26/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B26/10</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Scanning systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B26/101" definition-exists="false" ipc-concordant="G02B26/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/101</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with both horizontal and vertical deflecting means, e.g. raster or XY scanners </text><reference><text>colour television using laser beams scanning a display screen <class-ref scheme="cpc">H04N9/3129</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B26/103" definition-exists="false" ipc-concordant="G02B26/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having movable or deformable optical fibres, light guides or waveguides as scanning elements </text><reference><text>light guides <u>per se</u> <class-ref scheme="cpc">G02B6/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B26/105" definition-exists="false" ipc-concordant="G02B26/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with one or more pivoting mirrors or galvano-mirrors </text><reference><text><class-ref scheme="cpc">G02B26/101</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B26/106" definition-exists="false" ipc-concordant="G02B26/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having diffraction gratings as scanning elements, e.g. holographic scanners </text><reference><text>holographic optical elements <class-ref scheme="cpc">G02B5/32</class-ref>, holography <class-ref scheme="cpc">G03H</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B26/108" definition-exists="false" ipc-concordant="G02B26/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having one or more prisms as scanning elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B26/12" definition-exists="false" ipc-concordant="G02B26/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using multifaceted mirrors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B26/121" definition-exists="false" ipc-concordant="G02B26/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanical drive devices for polygonal mirrors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B26/122" definition-exists="false" ipc-concordant="G02B26/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control of the scanning speed of the polygonal mirror</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B26/123" definition-exists="false" ipc-concordant="G02B26/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multibeam scanners, e.g. using multiple light sources or beam splitters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B26/124" definition-exists="false" ipc-concordant="G02B26/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/124</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of the optical system between the light source and the polygonal mirror </text><reference><text><class-ref scheme="cpc">G02B26/123</class-ref>, <class-ref scheme="cpc">G02B26/127</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B26/125" definition-exists="false" ipc-concordant="G02B26/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of the optical system between the polygonal mirror and the image plane </text><reference><text><class-ref scheme="cpc">G02B26/123</class-ref>, <class-ref scheme="cpc">G02B26/127</class-ref> take precedence; F-Theta lenses <class-ref scheme="cpc">G02B13/0005</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B26/126" definition-exists="false" ipc-concordant="G02B26/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including curved mirrors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B26/127" definition-exists="false" ipc-concordant="G02B26/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adaptive control of the scanning light beam, e.g. using the feedback from one or more detectors </text><reference><text><class-ref scheme="cpc">G02B27/0031</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B26/128" definition-exists="false" ipc-concordant="G02B26/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/128</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Focus control</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B26/129" definition-exists="false" ipc-concordant="G02B26/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B26/129</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems in which the scanning light beam is repeatedly reflected from the polygonal mirror</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B27/00" definition-exists="true" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B27/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Optical systems or apparatus not provided for by any of the groups <class-ref scheme="cpc">G02B1/00</class-ref> - <class-ref scheme="cpc">G02B26/00</class-ref>, <class-ref scheme="cpc">G02B30/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/0006" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-01-15" status="published"><classification-symbol>G02B27/0006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation </text><reference><text><class-ref scheme="cpc">G02B1/18</class-ref> takes precedence; cleaning in general <class-ref scheme="cpc">B08B</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/0012" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical design, e.g. procedures, algorithms, optimisation routines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/0018" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for preventing ghost images </text><reference><text>anti-reflection coatings <class-ref scheme="cpc">G02B1/11</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/0025" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for optical correction, e.g. distorsion, aberration</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0031" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for scanning purposes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0037" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0037</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with diffracting elements </text><reference><text><class-ref scheme="cpc">G02B27/0056</class-ref> takes precedence; holographic optical elements <class-ref scheme="cpc">G02B5/32</class-ref>; zone systems <class-ref scheme="cpc">G02B5/1876</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/0043" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in projection exposure systems, e.g. microlithographic systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/005" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-02-01" status="published"><classification-symbol>G02B27/005</classification-symbol><class-title date-revised="2019-02-01"><title-part><CPC-specific-text><text>for correction of secondary colour or higher-order chromatic aberrations</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/0056" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0056</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using a diffractive optical element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/0062" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by controlling the dispersion of a lens material, e.g. adapting the relative partial dispersion</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0068" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having means for controlling the degree of correction, e.g. using phase modulators, movable elements </text><reference><text>controlling the phase of light using moving or deformable elements <class-ref scheme="cpc">G02B26/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/0075" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for altering, e.g. increasing, the depth of field or depth of focus</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Not complete, see also <class-ref scheme="cpc">G02B27/00</class-ref></note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/0081" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for altering, e.g. enlarging, the entrance or exit pupil</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/0087" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Phased arrays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/0093" definition-exists="false" ipc-concordant="G02B27/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/01" definition-exists="true" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Head-up displays</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> Details of head-up displays covered by <class-ref scheme="cpc">G02B27/01</class-ref> but not provided for in this group are also to be classified under <class-ref scheme="cpc">G02B27/01</class-ref> and subgroups </note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0101" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0101</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by optical features </text><reference><text><class-ref scheme="cpc">G02B27/0172</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/0103" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising holographic elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/0105" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Holograms with particular structures</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02B27/0107" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with optical power</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/0109" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0109</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising details concerning the making of holograms</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/011" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/011</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising device for correcting geometrical aberrations, distortion</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0112" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0112</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising device for genereting colour display</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/0114" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0114</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising dichroic elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/0116" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0116</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising devices for correcting chromatic aberration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0118" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0118</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising devices for improving the contrast of the display / brillance control visibility</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/012" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising devices for attenuating parasitic image effects</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G02B27/0121" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0121</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Parasitic image effect attenuation by suitable positioning of the parasitic images</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0123" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising devices increasing the field of view</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/0125" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Field-of-view increase by wavefront division</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0127" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0127</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising devices increasing the depth of field</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0129" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0129</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising devices for correcting parallax</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/013" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a combiner of particular shape, e.g. curvature</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0132" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0132</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising binocular systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/0134" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0134</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of stereoscopic type</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/0136" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0136</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a single image source for both eyes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0138" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G02B2027/0138</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>comprising image capture systems, e.g. camera</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/014" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising information/image processing systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0141" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0141</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the informative content of the display</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0143" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the two eyes not being equipped with identical nor symmetrical optical devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0145" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>creating an intermediate image</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0147" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0147</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a device modifying the resolution of the displayed image</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0149" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0149</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by mechanical features </text><reference><text><class-ref scheme="cpc">G02B27/0176</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/015" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving arrangement aiming to get less bulky devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0152" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0152</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving arrangement aiming to get lighter or better balanced devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0154" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0154</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with movable elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/0156" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0156</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with optionally usable elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/0158" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0158</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with adjustable nose pad</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/0159" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0159</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with mechanical means other than scaning means for positioning the whole image</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0161" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0161</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the relative positioning of the constitutive elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/0163" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0163</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electric or electronic control thereof</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0165" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>associated with a head-down display</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0167" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0167</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Emergency system, e.g. to prevent injuries</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0169" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0169</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Supporting or connecting means other than the external walls</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/017" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/017</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Head mounted</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/0172" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0172</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by optical features</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G02B27/0174" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0174</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>holographic</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/0176" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0176</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by mechanical features</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0178" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0178</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Eyeglass type, eyeglass details <class-ref scheme="cpc">G02C</class-ref></text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0179" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0179</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Display position adjusting means not related to the information to be displayed</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0181" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0181</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adaptation to the pilot/driver</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0183" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adaptation to parameters characterising the motion of the vehicle</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0185" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Displaying image at variable distance</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0187" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G02B2027/0187</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>slaved to motion of at least a part of the body of the user, e.g. head, eye</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0189" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0189</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sight systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/019" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising reticules formed by a mask</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G02B27/0192" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0192</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Supplementary details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0194" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0194</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with combiner of laminated type, for optical or mechanical aspects</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0196" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0196</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having transparent supporting structure for display mounting, e.g. to a window or a windshield</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G02B27/0198" definition-exists="false" ipc-concordant="G02B27/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2027/0198</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>System for aligning or maintaining alignment of an image in a predetermined direction</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/02" definition-exists="true" ipc-concordant="G02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B27/02</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Viewing or reading apparatus </text><reference><text>stereoscopic systems <class-ref scheme="cpc">G02B30/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/021" definition-exists="false" ipc-concordant="G02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reading apparatus</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/022" definition-exists="false" ipc-concordant="G02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Viewing apparatus </text><reference><text><class-ref scheme="cpc">G02B27/04</class-ref>, <class-ref scheme="cpc">G02B27/06</class-ref>, <class-ref scheme="cpc">G02B27/08</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/023" definition-exists="false" ipc-concordant="G02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for viewing X-ray images using image converters, e.g. radioscopes </text><reference><text>X-ray screens <class-ref scheme="cpc">G21K4/00</class-ref>; X-ray image conversion tubes <class-ref scheme="cpc">H01J31/50</class-ref>; circuit arrangements for X-ray apparatus incorporating image intensifiers <class-ref scheme="cpc">H05G1/64</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/024" definition-exists="false" ipc-concordant="G02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising a light source, e.g. for viewing photographic slides, X-ray transparancies </text><reference><text><class-ref scheme="cpc">G02B27/023</class-ref>, and photographic, cine and overhead projectors <class-ref scheme="cpc">G03B21/00</class-ref> and subgroups</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B27/025" definition-exists="false" ipc-concordant="G02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and magnifying means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B27/026" definition-exists="false" ipc-concordant="G02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and a display device, e.g. CRT, LCD, for adding markings or signs or to enhance the contrast of the viewed object</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/027" definition-exists="false" ipc-concordant="G02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising magnifying means </text><reference><text><class-ref scheme="cpc">G02B27/023</class-ref>, <class-ref scheme="cpc">G02B27/025</class-ref>, <class-ref scheme="cpc">G02B27/04</class-ref>, <class-ref scheme="cpc">G02B27/06</class-ref> and <class-ref scheme="cpc">G02B27/08</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/028" definition-exists="false" ipc-concordant="G02B27/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the supporting structure</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/04" definition-exists="false" ipc-concordant="G02B27/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having collapsible parts</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/06" definition-exists="false" ipc-concordant="G02B27/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with moving picture effect</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/08" definition-exists="false" ipc-concordant="G02B27/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Kaleidoscopes</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/09" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-07-01" status="published"><classification-symbol>G02B27/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for </text><CPC-specific-text><reference><text>adapting the beam shape of a laser diode <class-ref scheme="cpc">G02B19/0052</class-ref>; adapting the beam shape of an LED <class-ref scheme="cpc">G02B19/0061</class-ref>; coupling into light guides using intermediate optical elements <class-ref scheme="cpc">G02B6/4204</class-ref>; beam shaping specially adapted for lasers <class-ref scheme="cpc">H01S3/005</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0905" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0905</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dividing and/or superposing multiple light beams</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0911" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0911</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Anamorphotic systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0916" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B27/0916</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers </text><reference><text>coupling into light guides using intermediate optical elements <class-ref scheme="cpc">G02B6/4204</class-ref>; details of lighting devices in general <class-ref scheme="cpc">F21V</class-ref>; semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission <class-ref scheme="cpc">H01L33/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/0922" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0922</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the semiconductor light source comprising an array of light emitters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0927" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0927</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0933" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0933</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems for active beam shaping by rapid movement of an element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/0938" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0938</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Using specific optical elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/0944" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0944</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffractive optical elements, e.g. gratings, holograms </text><reference><text>gratings <u>per se</u> <class-ref scheme="cpc">G02B5/18</class-ref>; holograms used as optical elements <u>per se</u> <class-ref scheme="cpc">G02B5/32</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/095" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Refractive optical elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B27/0955" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0955</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lenses </text><reference><text>lenses <u>per se</u> <class-ref scheme="cpc">G02B3/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B27/0961" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0961</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lens arrays </text><reference><text>lens arrays <u>per se</u> <class-ref scheme="cpc">G02B3/0006</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B27/0966" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0966</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cylindrical lenses </text><reference><text>cylindrical lenses <u>per se</u> <class-ref scheme="cpc">G02B3/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B27/0972" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0972</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Prisms </text><reference><text>prisms <u>per se</u> <class-ref scheme="cpc">G02B5/04</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/0977" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0977</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Reflective elements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B27/0983" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0983</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>being curved</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/0988" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0988</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diaphragms, spatial filters, masks for removing or filtering a part of the beam</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/0994" definition-exists="false" ipc-concordant="G02B27/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/0994</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fibers, light pipes </text><reference><text>optical fibers <u>per se</u> <class-ref scheme="cpc">G02B6/02</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/10" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beam splitting or combining systems </text><reference><text>polarising systems <class-ref scheme="cpc">G02B27/28</class-ref>; mixing and splitting light signals using optical waveguides <class-ref scheme="cpc">G02B6/28</class-ref>; </text><CPC-specific-text><text>beam shaping, e.g. changing the cross-sectional area, by dividing or superposing multiple light beams <class-ref scheme="cpc">G02B27/0905</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/1006" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/1006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for splitting or combining different wavelengths </text><reference><text><class-ref scheme="cpc">G02B27/1086</class-ref>, <class-ref scheme="cpc">G02B27/141</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/1013" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-02-01" status="published"><classification-symbol>G02B27/1013</classification-symbol><class-title date-revised="2019-02-01"><title-part><CPC-specific-text><text>for colour or multispectral image sensors, e.g. splitting an image into monochromatic image components on respective sensors </text><reference><text>spectral imaging systems <class-ref scheme="cpc">G01J</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/102" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for generating a colour image from monochromatic image signal sources</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B27/1026" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/1026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with reflective spatial light modulators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B27/1033" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/1033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a single light modulator for all colour channels</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B27/104" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/104</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with scanning systems </text><reference><text>scanning systems <class-ref scheme="cpc">G02B26/10</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B27/1046" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/1046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with transmissive spatial light modulators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G02B27/1053" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/1053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a single light modulator for all colour channels</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/106" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for splitting or combining a plurality of identical beams or images, e.g. image replication</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/1066" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/1066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for enhancing image performance, like resolution, pixel numbers, dual magnifications or dynamic range, by tiling, slicing or overlapping fields of view</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/1073" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/1073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterized by manufacturing or alignment methods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/108" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for sampling a portion of a beam or combining a small beam in a larger one, e.g. wherein the area ratio or power ratio of the divided beams significantly differs from unity, without spectral selectivity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/1086" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/1086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>operating by diffraction only</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/1093" definition-exists="false" ipc-concordant="G02B27/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/1093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for use with monochromatic radiation only, e.g. devices for splitting a single laser source</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/12" definition-exists="false" ipc-concordant="G02B27/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating by refraction only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/123" definition-exists="false" ipc-concordant="G02B27/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>The splitting element being a lens or a system of lenses, including arrays and surfaces with refractive power</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/126" definition-exists="false" ipc-concordant="G02B27/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/126</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>The splitting element being a prism or prismatic array, including systems based on total internal reflection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/14" definition-exists="false" ipc-concordant="G02B27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>operating by reflection only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/141" definition-exists="false" ipc-concordant="G02B27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/141</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using dichroic mirrors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/142" definition-exists="false" ipc-concordant="G02B27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/142</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coating structures, e.g. thin films multilayers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/143" definition-exists="false" ipc-concordant="G02B27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using macroscopically faceted or segmented reflective surfaces</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/144" definition-exists="false" ipc-concordant="G02B27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/144</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using partially transparent surfaces without spectral selectivity </text><reference><text><class-ref scheme="cpc">G02B27/147</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/145" definition-exists="false" ipc-concordant="G02B27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having sequential partially reflecting surfaces</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B27/146" definition-exists="false" ipc-concordant="G02B27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/146</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a tree or branched structure</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/147" definition-exists="false" ipc-concordant="G02B27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/147</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using averaging effects by spatially variable reflectivity on a microscopic level, e.g. polka dots, chequered or discontinuous patterns, or rapidly moving surfaces </text><reference><text><class-ref scheme="cpc">G02B27/1086</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/148" definition-exists="false" ipc-concordant="G02B27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/148</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including stacked surfaces having at least one double-pass partially reflecting surface</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/149" definition-exists="false" ipc-concordant="G02B27/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/149</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using crossed beamsplitting surfaces, e.g. cross-dichroic cubes or X-cubes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/16" definition-exists="false" ipc-concordant="G02B27/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>used as aids for focusing</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/18" definition-exists="false" ipc-concordant="G02B27/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G02B27/18</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>for optical projection, e.g. combination of mirror and condenser and objective </text><CPC-specific-text><reference><text>photographic, cine and overhead projectors <class-ref scheme="cpc">G03B21/00</class-ref>; photographic projection printing <class-ref scheme="cpc">G03B27/32</class-ref>; photolithographic projectors <class-ref scheme="cpc">G03F7/20</class-ref>; projection television <class-ref scheme="cpc">H04N5/74</class-ref>; colour projection television <class-ref scheme="cpc">H04N9/31</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/20" definition-exists="false" ipc-concordant="G02B27/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for imaging minute objects, e.g. light-pointer</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/28" definition-exists="false" ipc-concordant="G02B27/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B27/28</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for polarising </text><reference><text>used in stereoscopes <class-ref scheme="cpc">G02B30/25</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/281" definition-exists="false" ipc-concordant="G02B27/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/281</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used for attenuating light intensity, e.g. comprising rotatable polarising elements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/283" definition-exists="false" ipc-concordant="G02B27/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>used for beam splitting or combining</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/285" definition-exists="false" ipc-concordant="G02B27/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising arrays of elements, e.g. microprisms</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/286" definition-exists="false" ipc-concordant="G02B27/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another </text><reference><text><class-ref scheme="cpc">G02B5/3083</class-ref> takes precedence; light guide coupling means utilising polarising elements <class-ref scheme="cpc">G02B6/34</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/288" definition-exists="false" ipc-concordant="G02B27/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filters employing polarising elements, e.g. Lyot or Solc filters </text><reference><text><class-ref scheme="cpc">G02B5/3016</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/30" definition-exists="false" ipc-concordant="G02B27/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Collimators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/32" definition-exists="false" ipc-concordant="G02B27/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fiducial marks and measuring scales within the optical system</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/34" definition-exists="false" ipc-concordant="G02B27/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>illuminated</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/36" definition-exists="false" ipc-concordant="G02B27/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>adjustable</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/40" definition-exists="true" ipc-concordant="G02B27/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B27/40</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Optical focusing aids</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/42" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diffraction optics </text><CPC-specific-text><text>, i.e. systems including a diffractive element being designed for providing a diffractive effect</text></CPC-specific-text><reference><text><class-ref scheme="cpc">G02B27/60</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/4205" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations are relevant</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/4211" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4211</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>correcting chromatic aberrations </text><reference><text><class-ref scheme="cpc">G02B27/0056</class-ref>, <class-ref scheme="cpc">G02B27/4222</class-ref>, <class-ref scheme="cpc">G02B27/4227</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/4216" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4216</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>correcting geometrical aberrations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/4222" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in projection exposure systems, e.g. photolithographic systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/4227" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in image scanning systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/4233" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4233</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a diffractive element [DOE] contributing to a non-imaging application </text><reference><text>diffusers having a diffractive element <class-ref scheme="cpc">G02B5/0252</class-ref>; filters having a diffractive element <class-ref scheme="cpc">G02B5/203</class-ref>; systems for controlling the direction of light having diffractive elements <class-ref scheme="cpc">G02B26/0808</class-ref>; scanning systems having diffractive elements <class-ref scheme="cpc">G02B26/106</class-ref>; beam shaping systems using diffractive optical elements <class-ref scheme="cpc">G02B27/0944</class-ref>; beam splitting or combining systems operating by diffraction <class-ref scheme="cpc">G02B27/1086</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/4238" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4238</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in optical recording or readout devices </text><reference><text>optical pick-up devices such as for CD, DVD or BD reader or recorder using diffraction optics <class-ref scheme="cpc">G11B7/1353</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/4244" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in wavelength selecting devices </text><reference><text>spectrometry <class-ref scheme="cpc">G01J</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/425" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in illumination systems </text><reference><text>mask illumination systems in photolithographic systems <class-ref scheme="cpc">G03F7/70158</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/4255" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for alignment or positioning purposes </text><reference><text>optical displacement encoding scales <class-ref scheme="cpc">G01D5/347</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/4261" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a diffractive element with major polarization dependent properties</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/4266" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diffraction theory; Mathematical models</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/4272" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-11-01" status="published"><classification-symbol>G02B27/4272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having plural diffractive elements positioned sequentially along the optical path</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/4277" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4277</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>being separated by an air space</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/4283" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a diffractive element with major temperature dependent properties</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/4288" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having uniform diffraction efficiency over a large spectral bandwidth</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/4294" definition-exists="false" ipc-concordant="G02B27/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/4294</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in multispectral systems, e.g. UV and visible</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/44" definition-exists="true" ipc-concordant="G02B27/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B27/44</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Grating systems</text></title-part><title-part><text>Zone plate systems </text><reference><text><class-ref scheme="cpc">G02B27/46</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/46" definition-exists="true" ipc-concordant="G02B27/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B27/46</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Systems using spatial filters</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>In this group, the filter may be in any plane, e.g. the image or the Fourier transfer plane.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/48" definition-exists="true" ipc-concordant="G02B27/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B27/48</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Laser speckle optics</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/50" definition-exists="false" ipc-concordant="G02B27/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optics for phase object visualisation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/52" definition-exists="false" ipc-concordant="G02B27/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Phase contrast optics </text><reference><text>in microscopes <class-ref scheme="cpc">G02B21/14</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/54" definition-exists="false" ipc-concordant="G02B27/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Schlieren-optical systems</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/56" definition-exists="false" ipc-concordant="G02B27/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optics using evanescent waves, i.e. inhomogeneous waves</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/58" definition-exists="false" ipc-concordant="G02B27/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optics for apodization or superresolution</text></title-part><title-part><text>Optical synthetic aperture systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/60" definition-exists="true" ipc-concordant="G02B27/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B27/60</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Systems using moiré fringes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/62" definition-exists="true" ipc-concordant="G02B27/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B27/62</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B27/64" definition-exists="true" ipc-concordant="G02B27/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G02B27/64</classification-symbol><class-title date-revised="2022-01-01"><title-part><text>Imaging systems using optical elements for stabilisation of the lateral and angular position of the image</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/642" definition-exists="false" ipc-concordant="G02B27/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/642</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Optical derotators, i.e. systems for compensating for image rotation, e.g. using rotating prisms, mirrors</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/644" definition-exists="false" ipc-concordant="G02B27/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/644</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>compensating for large deviations, e.g. maintaining a fixed line of sight while a vehicle on which the system is mounted changes course</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B27/646" definition-exists="false" ipc-concordant="G02B27/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2023-01-01" status="published"><classification-symbol>G02B27/646</classification-symbol><class-title date-revised="2023-01-01"><title-part><CPC-specific-text><text>compensating for small deviations, e.g. due to vibration or shake </text><reference><text>movement of one or more optical elements for control of motion blur in cameras, projectors or printers <class-ref scheme="cpc">G03B2205/0007</class-ref>; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor <class-ref scheme="cpc">H04N23/68</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B27/648" definition-exists="false" ipc-concordant="G02B27/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B27/648</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for automatically maintaining a reference alignment, e.g. in self-levelling surveying instruments </text><reference><text>surveying instruments <u>per se</u> <class-ref scheme="cpc">G01C</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G02B30/00" definition-exists="false" ipc-concordant="G02B30/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>G02B30/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images </text><reference><text>in microscopes <class-ref scheme="cpc">G02B21/22</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B30/10" definition-exists="false" ipc-concordant="G02B30/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>G02B30/10</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using integral imaging methods</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B30/20" definition-exists="false" ipc-concordant="G02B30/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>G02B30/20</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>by providing first and second parallax images to an observer's left and right eyes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B30/22" definition-exists="true" ipc-concordant="G02B30/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>G02B30/22</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>of the stereoscopic type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B30/23" definition-exists="false" ipc-concordant="G02B30/23" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/23</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using wavelength separation, e.g. using anaglyph techniques</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B30/24" definition-exists="false" ipc-concordant="G02B30/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/24</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>involving temporal multiplexing, e.g. using sequentially activated left and right shutters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B30/25" definition-exists="false" ipc-concordant="G02B30/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/25</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using polarisation techniques</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B30/26" definition-exists="true" ipc-concordant="G02B30/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>G02B30/26</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>of the autostereoscopic type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B30/27" definition-exists="false" ipc-concordant="G02B30/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/27</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>involving lenticular arrays</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B30/28" definition-exists="false" ipc-concordant="G02B30/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>G02B30/28</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>involving active lenticular arrays</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B30/29" definition-exists="false" ipc-concordant="G02B30/29" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>G02B30/29</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>characterised by the geometry of the lenticular array, e.g. slanted arrays, irregular arrays or arrays of varying shape or size</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B30/30" definition-exists="false" ipc-concordant="G02B30/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>G02B30/30</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>involving parallax barriers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B30/31" definition-exists="false" ipc-concordant="G02B30/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>G02B30/31</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>involving active parallax barriers </text><reference><text>involving directional light or back-light sources <class-ref scheme="cpc">G02B30/33</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G02B30/32" definition-exists="false" ipc-concordant="G02B30/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>G02B30/32</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>characterised by the geometry of the parallax barriers, e.g. staggered barriers, slanted parallax arrays or parallax arrays of varying shape or size</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B30/33" definition-exists="false" ipc-concordant="G02B30/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-02-01" status="published"><classification-symbol>G02B30/33</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>involving directional light or back-light sources</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B30/34" definition-exists="false" ipc-concordant="G02B30/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/34</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B30/35" definition-exists="false" ipc-concordant="G02B30/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/35</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using reflective optical elements in the optical path between the images and the observer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B30/36" definition-exists="false" ipc-concordant="G02B30/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/36</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using refractive optical elements, e.g. prisms, in the optical path between the images and the observer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G02B30/37" definition-exists="false" ipc-concordant="G02B30/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/37</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Collapsible stereoscopes</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B30/40" definition-exists="false" ipc-concordant="G02B30/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/40</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>giving the observer of a single two-dimensional [2D] image a perception of depth</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B30/50" definition-exists="false" ipc-concordant="G02B30/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/50</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the image being built up from image elements distributed over a 3D volume, e.g. voxels</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B30/52" definition-exists="false" ipc-concordant="G02B30/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/52</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the 3D volume being constructed from a stack or sequence of 2D planes, e.g. depth sampling systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B30/54" definition-exists="false" ipc-concordant="G02B30/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/54</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>the 3D volume being generated by moving a 2D surface, e.g. by vibrating or rotating the 2D surface</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G02B30/56" definition-exists="false" ipc-concordant="G02B30/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/56</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>by projecting aerial or floating images</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G02B30/60" definition-exists="false" ipc-concordant="G02B30/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G02B30/60</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>involving reflecting prisms and mirrors only</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="G02B207/00" date-revised="2013-01-01" status="published"><classification-symbol>G02B2207/00</classification-symbol>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="G02B207/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2207/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coding scheme for general features or characteristics of optical elements and systems of subclass <class-ref scheme="cpc">G02B</class-ref>, but not including elements and systems which would be classified in <class-ref scheme="cpc">G02B6/00</class-ref> and subgroups</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B207/101" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G02B2207/101</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Nanooptics</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B207/107" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G02B2207/107</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Porous materials, e.g. for reducing the refractive index</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B207/109" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2207/109</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sols, gels, sol-gel materials</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B207/113" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2207/113</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Fluorescence</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B207/114" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2207/114</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Two photon or multiphoton effect</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B207/115" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2207/115</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Electrowetting</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B207/117" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2207/117</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adjustment of the optical path length</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B207/121" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2207/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Antistatic or EM shielding layer</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B207/123" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2207/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Optical louvre elements, e.g. for directional light blocking</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B207/125" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2207/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Wavefront coding</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G02B207/129" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G02B2207/129</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coded aperture imaging</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></class-scheme> |