Light measuring device for controlling exposure

Details Light measuring device for controlling exposure Light measuring device for controlling exposure

1980-12-22

1983-12-13

Arnold, Bruce Y.

Optics: measuring and testing

Photometers

Photoelectric

354430, 354432, G01J 130

Patent

active

044202520

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.

REFERENCES:
patent: 3555285 (1971-01-01), Irving
patent: 3896458 (1975-07-01), Johnson et al.
patent: 3906219 (1975-09-01), Stauffer
patent: 4047187 (1977-09-01), Mashimo et al.
patent: 4075640 (1978-02-01), Ueda et al.
patent: 4104654 (1978-08-01), Maitani et al.
patent: 4182573 (1980-01-01), Yamada et al.

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