Automatic exposure control apparatus in a camera

Details Automatic exposure control apparatus in a camera Automatic exposure control apparatus in a camera

1976-09-23

1978-09-26

Adams, Russell E.

354 38, 354 60A, G03B 708

Patent

active

041175000

ABSTRACT:
Automatic exposure control apparatus for automatic setting of exposure parameters wherein the settings for any two of three exposure control parameters, namely, diaphragm aperture, shutter speed and filter transmittance, are preselected and the setting for the remaining parameter is automatically determined thereafter in accordance with the settings for the two preselected settings and other uncontrollable parameters. The exposure control apparatus includes signal supply means which provide pulse signals corresponding to the two preselected settings and arithmetic operation means which performs arithmetic operations on the pulse signals corresponding to the preselected settings and other pulse signals which correspond to the measured intensity of the light illuminating the object to be photographed and to the speed of the film loaded in the camera, and produces a pulse signal which controls the remaining exposure control parameter.

REFERENCES:
patent: 3978497 (1976-08-01), Kondo
patent: 3987461 (1976-10-01), Kondo
patent: 3995285 (1976-11-01), Kondo

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