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PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
G02F 1/17

based on variable-absorption elements not provided for in groups G02F1/015 - G02F1/169

Introduced: July 1974

Title

Titles differ between systems:

IPC: based on variable-absorption elements not provided for in groups

CPC: based on variable-absorption elements not provided for in groups G02F1/015 - G02F1/169

Full Title

Full titles differ between systems:

IPC:

Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics > for the control of the intensity, phase, polarisation or colour > based on variable-absorption elements not provided for in groups

CPC:

Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics > for the control of the intensity, phase, polarisation or colour (G02F1/29, G02F1/35 take precedence) > based on variable-absorption elements not provided for in groups G02F1/015 - G02F1/169

Of 4 combined children, 0 exist in both systems.

4 codes are CPC-only extensions.

Child Classifications

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