image orthicon

noun

, Television.

1. 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.

image orthicon

noun

1. 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

Word History and Origins

Origin of image orthicon¹

First recorded in 1940–45