DIFF Subgroup
G02B 6/354 Full Title
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings > Coupling light guides > Optical coupling means (G02B6/36, G02B6/42 take precedence) > having switching means (by changing the optical properties of the medium G02F1/00)
Of 5 combined children, 0 exist in both systems.
5 codes are CPC-only extensions.