for the control of the intensity, phase, polarisation or colour (G02F1/29, G02F1/35 take precedence)

Introduced: July 1974

Title

Titles differ between systems:

IPC: for the control of the intensity, phase, polarisation or colour

CPC: for the control of the intensity, phase, polarisation or colour (G02F1/29, G02F1/35 take precedence)

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

CPC:

Of 21 combined children, 14 exist in both systems.

7 codes are CPC-only extensions.

7 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1974.

Child Classifications

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G02F 1/0102 +2 CPC CPC only CPC only
G02F 1/011 +2 CPC CPC only CPC only
G02F 1/0121 +1 CPC CPC only CPC only
G02F 1/0126 CPC only CPC only
G02F 1/0128 +1 CPC CPC only CPC only
G02F 1/0136 +3 CPC CPC only CPC only
G02F 1/0147 CPC only CPC only
G02F 1/015 based on semiconductor elements having potential barriers, e.g. having a PN or PIN junction (G02F1/03 takes precedence) since 1980 +2 CPC IPC+CPC Available in IPC and CPC
G02F 1/03 based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect (G02F1/061 takes precedence) since 1974 +5 CPC IPC+CPC Available in IPC and CPC
G02F 1/061 based on electro-optical organic material (G02F1/07, take precedence) since 2000 IPC+CPC Available in IPC and CPC
G02F 1/07 based on electro-optical liquids exhibiting Kerr effect since 1974 +2 CPC IPC+CPC Available in IPC and CPC
G02F 1/09 based on magneto-optical elements, e.g. exhibiting Faraday effect since 1974 +4 CPC IPC+CPC Available in IPC and CPC
G02F 1/11 based on acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves (acousto-optical deflection G02F1/33) since 1974 +2 CPC IPC+CPC Available in IPC and CPC
G02F 1/13 based on liquid crystals, e.g. single liquid crystal display cells since 1974 +7 CPC IPC+CPC Available in IPC and CPC
G02F 1/15 based on an electrochromic effect since 1990 +2 CPC IPC+CPC Available in IPC and CPC
G02F 1/165 based on translational movement of particles in a fluid under the influence of an applied field since 2019 IPC+CPC Available in IPC and CPC
G02F 1/169 based on orientable non-spherical particles having a common optical characteristic, e.g. suspended particles of reflective metal flakes since 2019 IPC+CPC Available in IPC and CPC
G02F 1/17 based on variable-absorption elements not provided for in groups G02F1/015 - G02F1/169 since 1974 +4 CPC IPC+CPC Available in IPC and CPC
G02F 1/19 based on variable-reflection or variable-refraction elements not provided for in groups G02F1/015 - G02F1/169 since 1974 +1 CPC IPC+CPC Available in IPC and CPC
G02F 1/21 by interference since 1974 +7 CPC IPC+CPC Available in IPC and CPC