Facsimile transmitting system employing reference photo sensor
In an information transmission system in which an information-carrying medium, such as a document or the like, is scanned by a spot or been produced by a light source, the light reflected from the medium is compared with light derived from the light source to develop an information signal that is a...
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| Sprache: | eng |
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| Zusammenfassung: | In an information transmission system in which an information-carrying medium, such as a document or the like, is scanned by a spot or been produced by a light source, the light reflected from the medium is compared with light derived from the light source to develop an information signal that is a measure of the information content of the medium and is substantially unaffected by any variations in the intensity of the light source. |
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