image orthicon


noun Television.

a camera tube, more sensitive than the orthicon, in which an electron image generated by a photocathode is focused on one side of a target that is scanned on its other side by a beam of low-velocity electrons to produce the output signal.

Origin of image orthicon

First recorded in 1940–45

British Dictionary definitions for image orthicon

image orthicon

noun

a television camera tube in which electrons, emitted from a photoemissive surface in proportion to the intensity of the incident light, are focused onto the target causing secondary emission of electrons