orthicon(redirected from Video camera tube)
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An electron tube used in early video cameras to capture images by scanning a photoactive mosaic inside the camera with a low-velocity electron beam. Unlike the earlier iconoscope, it could capture images in low light. Also called image orthicon.
(Electronics) a television camera tube in which an optical image produces a corresponding electrical charge pattern on a mosaic surface that is scanned from behind by an electron beam. The resulting discharge of the mosaic provides the output signal current. See also image orthicon
[C20: from ortho- + icon(oscope)]
also or•thi•con•o•scope(ˌɔr θɪˈkɒn əˌskoʊp)
a television camera tube in which a beam of low-velocity electrons scans a photoemissive mosaic.
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|Noun||1.||orthicon - a now obsolete picture pickup tube in a television camera; 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|