orthicon : Definition, Usages, News and More

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  • n  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

  • The size and complication of the image orthicon would keep television from any use as a hidden, unwinking eye.
  • The image orthicon, 100 times as sensitive as earlier tubes, had actually amplified the light reflected from their faces.
  • Primarily intended for brightening the faint images on X-ray fluoroscope screens, it is based on the image-orthicon tube used in television cameras.

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