Term - Photo telegraphy
|Photo telegraphy||SWPP Photographic Glossary|
Thursday 22nd August 2019
The transmission of pictures between two points by means of radio or telegraph. A print is wrapped around a cylinder and scanned by a small spot of light. Reflected light values are transmitted as a stream of signals. They control an exposing light source at the receiving station, which exposes light sensitive material on a similar drum.
Information provided by: SWPP
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