G - Physics – 03 – B
Patent
G - Physics
03
B
340/155, 73/51,
G03B 7/08 (2006.01) G03B 7/083 (2006.01)
Patent
CA 1061152
ABSTRACT OF THE DISCLOSURE An exposure control circuit that produces a vari- able exposure interval depending upon scene brightness or a constant exposure interval proportional to a predetermined scene brightness, by providing a photocurrent proportional to the level of actual scene brightness and a reference current proportional to the predetermined scene brightness and, preferably automatically, selectively integrating the photo- current or the reference current depending upon the relative magnitude of the currents. The integrated current provides a signal to produce a variable exposure interval related to actual scene brightness when the photocurrent is greater than the reference current, or provides a signal to produce a con- stat exposure interval when the photocurrent is less than the reference current. The selective integration may be disabled to permit only the photocurrent to be integrated over all scene brightness and thus produce only a variable exposure interval that is related to actual scene brightness.
263033
LandOfFree
Comparative control circuit for photographic exposure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Comparative control circuit for photographic exposure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparative control circuit for photographic exposure will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-841469