Automatic exposure controller for a camera

Details Automatic exposure controller for a camera Automatic exposure controller for a camera

1983-08-29

1985-02-19

Perkey, William B.

354458, G03B 7093

Patent

active

045001928

ABSTRACT:
An automatic exposure controller for a camera comprises an analog-to-digital converter which converts a logarithmically compressed voltage corresponding to the brightness of an object being photographed into a digital value. A central processing unit receives the digital value as well as exposure information relating to a diaphragm aperture, film speed and the like, and responds thereto by calculating an exposure period, which is then stored. Upon shutter release, the digital value from the central processing unit is converted into a corresponding analog value by a digital-to-analog converter, and is then expanded into the real time.

REFERENCES:
patent: 4277155 (1981-07-01), Rentschler

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