Photometering device for obtaining exposure information

Details Photometering device for obtaining exposure information Photometering device for obtaining exposure information

1982-06-24

1984-10-09

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

354432, 356222, G01J 144

Patent

active

044763832

ABSTRACT:
A multi-metering device comprises division of an object field into a plurality of areas and metering said plurality of areas and generating a plurality of photoelectric outputs corresponding to said plurality of areas, a binary circuit for standardizing said plurality of photoelectric outputs by the average output of said plurality of photoelectric outputs, and a classifying circuit for classifying the object field on the basis of said standardized outputs and operating and extracting a proper metering output by the classifying output.

REFERENCES:
patent: 3717077 (1973-02-01), Harvey
patent: 3772517 (1973-11-01), Smith
patent: 4214826 (1980-07-01), Uchida et al.

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