Apparatus for maintaining of a cathode ray tube image within...

Details Apparatus for maintaining of a cathode ray tube image within... Apparatus for maintaining of a cathode ray tube image within...

H - Electricity

04

N

314/43.6

H04N 1/036 (2006.01) A61B 5/05 (2006.01) H04N 1/23 (2006.01) H04N 1/407 (2006.01)

Patent

CA 1198767

A B S T R A C T Apparatus and method are provided for controlling the brightness and brightness range of a CRT-produced image. The resolution of photographs of the CRT-formed images is improved by establishing the absolute brightness and brightness range of the image to be reproduced within the brightness acceptance range of the photographic material used to record the images. Light sensing and measurement of the CRT image permits the establishment of a suitable image brightness and brightness range when representative samples of the video signal are supplied to the monitor CRT of the camera.

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