Device for the local attenuation of the light intensity

摘要

The device uses an optically addressed spatial light modulator (OASLM) inserted between 2 polarisers (P1,P2) within a lens system having a number of lens elements (L1,L2,L3), e.g. a spectacle lens. The optically addressed spatial light modulator is provided by two transparent electrode plates, a semi-transparent photoconductive layer (PC) and a liquid crystal layer (FLC) with a helix axis parallel to the electrode plates.