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An electron tube used in the earliest video cameras to capture images by scanning a photoactive mosaic with an electron beam.
[Originally a trademark.]
(Broadcasting) a television camera tube in which an electron beam scans a photoemissive surface, converting an optical image into electrical pulses
a television camera tube in which a beam of high-velocity electrons scans a photoemissive mosaic. Compare orthicon.
[1930–35; formerly a trademark]