Light metering device for camera

Details Light metering device for camera Light metering device for camera

1995-06-05

1996-02-27

Adams, Russell E.

354432, G03B 1336, G03B 708

Patent

active

054953138

ABSTRACT:
In a light metering device, first luminance information is calculated from the output of a first photoelectric converter which photoelectrically converts the light beam from a first area of the object field. After a predetermined time from the photoelectric conversion, second luminance information is calculated from the output of a second photoelectric converter which photoelectrically converts the light beam from a second area, having an overlapping area with the first area. A first overlapping area luminance, in the overlapping area of the first photoelectric converter, and a second overlapping area luminance, in the overlapping area of the second photoelectric converter are determined, and the light values in the first and second areas are calculated from the first and second luminance information and the first and second overlapping area luminance.

REFERENCES:
patent: 4274721 (1981-06-01), Fukuhara et al.
patent: 4561749 (1985-12-01), Utagawa
patent: 4951080 (1990-08-01), Sakamoto et al.
patent: 5126777 (1992-06-01), Akashi et al.
patent: 5168299 (1992-12-01), Taniguchi et al.
patent: 5239333 (1993-08-01), Takagi

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