Photometric control device for camera

Details Photometric control device for camera Photometric control device for camera

1994-05-13

1996-05-07

Perkey, W. B.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356215, 356222, G03B 708

Patent

active

055151329

ABSTRACT:
A photometric control device for a camera comprises a light-receiving device 7 for conducting a photometry on a subject field with an accumulation type of photoelectric conversion device to output a photometric signal corresponding to brightness of the subject field, an accumulation time setting unit 13 for controlling an accumulation time of the photoelectric conversion device, a selection unit 14 for selecting any one of a first brightness value calculation mode for suppressing affection of flicker of a light source and a second brightness value calculation mode for taking no consideration of the affection of flicker on the basis of the accumulation time determined in the accumulation time setting unit 13, and a brightness value calculation unit 10 for calculating a brightness value on the basis of the photometric signal from the light-receiving device 7.

REFERENCES:
patent: 4774588 (1988-09-01), Noda et al.
patent: 4791446 (1988-12-01), Ishida et al.
patent: 4843417 (1989-06-01), Ishida et al.
patent: 4929824 (1990-05-01), Miyazaki
patent: 4989093 (1991-01-01), Kaneko
patent: 5053871 (1991-10-01), Ogawa et al.
patent: 5272539 (1993-12-01), Kondo
patent: 5293238 (1994-03-01), Naxano et al.

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