DIFF Subgroup
G02F 1/011 Full Title
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)
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.