G - Physics – 03 – B
Patent
G - Physics
03
B
95/53.3
G03B 7/08 (2006.01) G03B 7/099 (2006.01) G03B 7/16 (2006.01) G03B 9/42 (2006.01)
Patent
CA 1170884
6367 DYNAMICALLY CONTROLLED SCENE RADIATION LEAKAGE FOR EXPOSURE CONTROL ABSTRACT OF THE DISCLOSURE Method and exposure control apparatus are disclosed for generally simultaneously evaluating preselected different frequencies during a portion of the exposure cycle for controlling exposure. Included is an arrangement responsive to movement of the shutter mechanism for facilitating combined evaluation of a first set of preselected scene radiation frequencies transmitted along a given first path for evaluation of flash illumination and at the same time preselected lesser amounts of a second set of scene radiation frequencies, different from the first set, transmitted along a second given path for ambient evaluation. In one preferred embodiment, the evaluated first set of frequencies comprises essentially infrared frequencies and the evaluated second set of frequencies comprises essentially visible frequencies.
384652
Johnson Bruce K.
Whiteside George D.
Polaroid Corporation
Smart & Biggar
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