An optical image-storage and processing device using electro-optic ZnS

An image-sensing and memory device is described that photoconductively converts and electrostatically stores optical images at the interface between a UV-sensitive ZnS film and associated blocking electrode. Optical readout is accomplished by means of the Pockels electro-optic effect generated in the ZnS film by the electrostatic image. A high ratio of UV to visible photosensitivity (approximately 10⁵:1 between 340 and 630 nm) allows pseudo-nondestructive readout of the stored image pattern.