F
facsimile
(1) The process of scanning a still picture to obtain corresponding electrical signals which can be used locally or remotely to produce a recorded likeness of the picture.
The process is extensively used by news media for the radio transmission of photographs and documents over telephone circuits. The original is clamped to a cylinder which rotates, causing a spot of light to scan the material in a spiral path. The light transmitted through the original falls on a photocell, the output of which is sent to the reproducing machine. The image is reproduced on photo-sensitive material clamped to a rotating cylinder and scanned by a light beam the density of which is controlled in effect by the output of the photocell. Synchronising ...
Get Newnes Dictionary of Electronics now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
