An Automatic Sensitivity Control for Monochrome Film Cameras
S. L. Bendell, Koichi Sadashige · Journal of the SMPTE · 1960
The problem of accommodating unpredictable variations in average density of films and slides used in TV programing has spurred interest in devices for automatic control of signal levels from vidicon camera chains. A practical device provides control over a wide range of densities, with the particular advantage that the method of injecting control avoids introduction of “bounce” into the video signal.