DIFF Subgroup
G02B 5/3008 Full Title
Optical elements other than lenses (light guides G02B6/00; optical logic elements G02F3/00) > Polarising elements (light-modulating devices with active elements G02F1/00)
G02B 5/3008 Optical elements other than lenses (light guides G02B6/00; optical logic elements G02F3/00) > Polarising elements (light-modulating devices with active elements G02F1/00)