an optical or photon image is converted by a photocathode to an electron ge . a semiconductor plate receives the electron image on a first side thereof . for an electronically controlled time , the image is integrated and stored in thousands of reversed biased pn junctions connected to micro - sized conductors , in the plate . an intensified image is then transfered from a second side of the plate at an electrically controlled time to adjacent moving film which is exposed to intensified images from the plate .