Circuit for a computerized photoflash control

Details Circuit for a computerized photoflash control Circuit for a computerized photoflash control

1983-06-22

1984-11-20

Adams, Russell E.

354418, 3541451, G03B 1505

Patent

active

044836058

ABSTRACT:
The invention relates to a circuit for a computerized photoflash control which is supplied, preferably with the aid of a photographic element, with a current corresponding to the reflected light during the flash, from which an electrical quantity terminating the flash is derived. The invention consists in that the circuit contains a comparator, with a voltage derived from the current supplied at one of its inputs, while the other input of the comparator is supplied with an adjustable reference voltage. Connected to the output of the comparator is a switching path which is actuated by the comparator upon signal output, thereby terminating the flash.

REFERENCES:
patent: 4241279 (1980-12-01), Numata
patent: 4426143 (1984-01-01), Mizokami
patent: 4442381 (1984-04-01), Numata

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