| 摘要 |
An exposure control system having application in a color contact printer wherein the master film is sampled on a line at a time basis by a detecting head. The detecting head may comprise a continuous light source, a cylindrical lens, a light pipe and a plurality of photodetectors. Each photodetector furnishes an output representing the sensed light which has been modulated in color and intensity as the result of its passage through the master film. This detected or sensed light is thereafter applied to an analog computer for processing. The computer furnishes control data to a plurality of phosphor-excited printing light sources which are modulated in color and intensity thereby. Concurrently, the printing light sources expose duplicating material or film while in contact with the master film.
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