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单词 image orthicon
释义

WordReference Random House Unabridged Dictionary of American English © 2024
image or′thicon, [Television.]
  1. Radio and Televisiona 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.
  • 1940–45

Collins Concise English Dictionary © HarperCollins Publishers::
image orthicon n
  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
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更新时间:2024/9/21 22:39:32