Exposure control device for camera

Details Exposure control device for camera Exposure control device for camera

1984-08-01

1985-08-13

Hix, L. T.

354427, 354431, 354440, G03B 708, G03B 793, G03B 914

Patent

active

045346380

ABSTRACT:
The disclosed camera has shutter blades which also serve as diaphragm blades and an auxiliary light-metering aperture arranged, upon operation of the shutter blades, to be opened and closed depending upon opening and closing of a main aperture which lies in the path of light from an object to be photographed to a film. A photo-interpreter composed of a light projection element and a photosensitive element optico-electrically detects the size of the opening of the main aperture of the shutter blades. Once the auxiliary aperture has assumed a totally light blocking state from a pre-opened state, the photo-interpreter produces an output signal that initiates counting of light metering data. During flash photography, a flash device is triggered with a timing to make a proper exposure with a signal representing the required aperture value as detected by the photo-interpreter.

REFERENCES:
patent: 4192595 (1980-03-01), Wakazono et al.
patent: 4258990 (1981-03-01), Arisaka et al.
patent: 4317624 (1982-03-01), Shenk

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