Light measuring device for flash photography

Details Light measuring device for flash photography Light measuring device for flash photography

1981-08-03

1983-02-15

Perkey, William B.

Optics: measuring and testing

Range or remote distance finding

With photodetection

354 33, 354 60L, 354 60F, 354127, 356215, 356222, 315151, 315155, 315158, 315241P, 250214P, G03B 1505, G01J 146, H05B 4138

Patent

active

043737935

ABSTRACT:
The disclosure is directed to an improved light measuring device which is used in flash photography for measuring a preliminary flash light to obtain camera exposure information for photography under a primary flash light. The device is so arranged as to preliminarily obtain informations of light amount contributing to photographing, with respect to each portion or area of a scene to be photographed or object field, in taking photographs with the employment of the auxiliary light.

REFERENCES:
patent: 4291979 (1981-09-01), Yuasa et al.

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