Exposure control apparatus for a camera

Details Exposure control apparatus for a camera Exposure control apparatus for a camera

1974-12-19

1976-08-03

Hix, L. T.

354 29, 354 60E, G03B 708

Patent

active

039732673

ABSTRACT:
The present invention relates to an exposure control apparatus for a camera which is so designed that the output terminal of the light measuring circuit of the brightness of the object to be photographed having a photo electric transducing means is connected to one input terminal of an operation amplifier. The output of the photographing information setting circuit, having a variable resistance means for setting other photographing informations than the information of the brightness of the object to be photographed, is connected to the other input terminal of the above mentioned operation amplifier. This is done in such a manner that proper exposure conditions can be obtained by means of the output of the exposure control circuit connected to the output of the above mentioned operation amplifier. Each input signal to the operational amplifier is adjusted by a bias signal which is controlled in accordance with ambient temperature conditions.

REFERENCES:
patent: 3678826 (1972-07-01), Mori et al.
patent: 3690230 (1972-09-01), Mori et al.
patent: 3750540 (1973-08-01), Yanagisawa et al.
patent: 3863263 (1975-01-01), Itagaki

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