Light measuring device for flash photography

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

1985-02-13

1987-06-09

Perkey, W. B.

Optics: measuring and testing

Range or remote distance finding

With photodetection

354432, 354475, 356215, 356222, 315151, 315155, 315158, 315241P, 250214P, G03B 1505, G03B 1720, G01J 146, H05B 4138

Patent

active

RE0324370

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 informations for photography under a primary flash light. The device is so arranged as to preliminarily obtain information 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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