Device for exposure metering

Details Device for exposure metering Device for exposure metering

1997-08-20

1999-05-25

Perkey, W. B.

Photography

Having photocell at specific position within camera

Movable into or out of light path

396272, G03B 7099

Patent

active

059077271

ABSTRACT:
A device for exposure metering in photographic cameras including a reflector located in the imaging beam path. The surface of the reflector is provided with a reflecting structure whose size corresponds at least approximately to that of the image recording format. At least one photoelectric receiver records the light intensity of a portion of the image reflected from the reflecting structure. The reflector is pivotally mounted in the camera housing such that during exposure metering the reflector surface is in the vicinity of the film plane of the camera. A limited portion of the reflector is transparent and a photoelectric receiver is set into the backside of the reflector behind the transparent portion.

REFERENCES:
patent: 3872484 (1975-03-01), Hashimoto et al.
patent: 4181412 (1980-01-01), Holle et al.
patent: 4390258 (1983-06-01), Mizokami
patent: 5006879 (1991-04-01), Takagi et al.

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