image orthicon
English Thesaurus
1. 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 (noun.artifact)
| hypernym | : | television pickup tube, television-camera tube, |
| definition | : | a tube that rapidly scans an optical image and converts it into electronic signals (noun.artifact) |
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