Patent ID: RE43642

Claim:
An optically addressed spatial light modulator (OASLM) comprising: a first transparent substrate; a first transparent electrode formed on said the first transparent substrate; a photoconductive layer formed on the first transparent electrode comprising hydrogenated amorphous silicon carbide; a light-blocking layer formed on said the photoconductive layer and comprising hydrogenated amorphous carbon; a dielectric mirror layer, itself having a multiple layer structure formed on said the light-blocking layer; and a second transparent substrate upon which is formed a second transparent electrode, and between said the second electrode and the dielectric mirror a liquid crystal layer and orientation means therefore ; , wherein the light-blocking layer consists of hydrogenated amorphous carbon , and wherein the dielectric mirror is formed from alternate hydrogenated amorphous silicon carbide (a-Si:C:H) layers and hydrogenated amorphous carbon (a-C:H) layers to form layers of higher and lower refractive index respectively.