vidicon

a camera tube in which a charge-density pattern is formed on a photoconductive surface scanned by a beam of low-velocity electrons for transmission as signals.

a small television camera tube, used in closed-circuit television and outside broadcasts, in which incident light forms an electric charge pattern on a photoconductive surface. Scanning by a low-velocity electron beam discharges the surface, producing a current in an adjacent conducting layer: See also Plumbicon