image orthicon

American  

noun

Television.

1. a 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.

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image orthicon British  

noun

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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Etymology

Origin of image orthicon

First recorded in 1940–45

Example Sentences

It already sees well in ordinary indoor light, and RCA thinks that it can be made ten times as sensitive as the image orthicon.

From Time Magazine Archive

Compared with the image orthicon, which is packed with intricate entrails, the Vidicon is a dream-tube of electronic simplicity.

From Time Magazine Archive

The image orthicon, 100 times as sensitive as earlier tubes, had actually amplified the light reflected from their faces.

From Time Magazine Archive

The size and complication of the image orthicon would keep television from any use as a hidden, unwinking eye.

From Time Magazine Archive

Then R.C.A.'s new "image orthicon" pickup tube went into action, and the girls reappeared on the screen, brighter than ever.

From Time Magazine Archive