a television camera electron tube, consisting of a vacuum tube enclosing a photosensitive plate on which the image is projected and an electron gun that scans the image with a narrow focused beam
See iconoscope in American Heritage Dictionary 4
(ī-kŏnˈə-skōpˌ)
noun
An early form of a television-camera tube, equipped for rapid scanning of an information-storing, photoactive mosaic.