Automatic exposure control camera

Details Automatic exposure control camera Automatic exposure control camera

1983-10-07

1985-04-30

Perkey, William B.

354416, 354431, 354471, G03B 1708, G03B 1505, G03B 1718

Patent

active

045140731

ABSTRACT:
An automatic exposure control camera is of a type capable of controlling both the camera exposure and the flash light amount to be emitted by an electronic flash device. The automatic exposure control camera includes an average light measuring device for measuring an amount of the entire light impinging on an image forming plane and for producing an average signal representing the average light amount, and a spot light measuring device for measuring an amount of light impinging on a spot of the image forming plane and for producing a spot signal representing the light amount at the spot. When taking a photograph with the aid of flash light from a flash device, the amount of light impinging on the film surface is measured and integrated in real time using the average signal, and when the integrated amount reaches a predetermined level, the flash device is controlled so as to stop the emission of flash light, thereby photographing the object with an appropriate light amount even when the object is located at a corner of the frame.

REFERENCES:
patent: 4359275 (1982-11-01), Hasegawa

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