Exposure control device

Details Exposure control device Exposure control device

1975-06-26

1978-09-19

Adams, Russell E.

354 50, 354 51, 354 60A, G03B 708

Patent

active

RE0297763

ABSTRACT:
In the exposure control apparatus disclosed, a photo-electric element converts light to which it is exposed to an electrical quantity. A pulse entry circuit responds to the photo-electric element and enters a sequence of sets of pulses into a memory. Each set of pulses corresponds in number to the electric quantity and erases the previous set. A timing clock responds to a signal from a shutter opening member and keeps reading out the content of the memory until the memory is empty at which time the circuit, in conjunction with the memory, produces a shutter closing signal.

REFERENCES:
patent: 3092002 (1963-06-01), Frenk
patent: 3269287 (1966-08-01), Ost
patent: 3526181 (1970-09-01), Fahlenberg et al.
patent: 3609456 (1971-09-01), Kayaguchi et al.
patent: 3611159 (1971-10-01), Florsheim et al.

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