Light measuring device for controlling exposure
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 13, 1983
Grant Date -
N/A
app pub date -
Dec 22, 1980
filing date -
Dec 21, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A plurality of photodetectors are arranged to receive light from different parts of a photographic subject matter. The outputs of the photodetectors are weighted according to the position of the photodetectors. The weighted outputs are summed up and used as image brightness information. The weighting can be made by varying the size of the photodetectors or changing a covering area of a mask provided to cover the photodetectors.
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Cited Art Landscape
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