from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A television camera pickup tube, more sensitive than the iconoscope, that uses a low-velocity electron beam to scan a photoactive mosaic. Also called image orthicon.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. TV camera tube.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • 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


orth(o)- + icon(oscope).
(American Heritage® Dictionary of the English Language, Fourth Edition)


  • Essentially, the orthicon was a pickup tube that used a low-velocity electron beam to scan a photoactive mosaic.

    First Man

  • Corporations also use other things to similar purposes, one famous example being the duel between Philo Farnsworth, the actual inventor of television more precisely, the orthicon tube, and David Sarnoff and RCA.

    Archive 2007-05-01

  • Principally, weight and electrical power were the factors that required the much smaller black-and-white-image orthicon TV camera.

    First Man

  • The only way that Neil and Buzz could have improved the TV picture with the orthicon camera system was to move from the small antenna to the large S-band erectable antenna that was stored on the LM.

    First Man

  • In one or two houses, though, kids sat staring at a cabinet in which was displayed a small glowing image brought by orthicon tube; for the Future, or a piece of it anyway, had arrived.

    Asimov's Science Fiction

  • An image orthicon television camera was the sensor, and the thirty-frame-per-second 875-line interlaced output was displayed on a kinescope in an accompanying van for recording by a 35 mm motion-picture camera.


  • The image orthicon, difficult to adjust and "tune" in the field, was replaced with image-enhancement devices, auto tracking was developed, and many other improvements made.


  • The image orthicon would have been adjusted for daylight.


  • The Air Force pressed on with projects to place a permanent telescope at Anderson Peak and equip it with our own image orthicon device.


  • Conditions were ideal for the light-sensitive image orthicon to capture the best shots.



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