Flash photographing system

Details Flash photographing system Flash photographing system

1997-06-02

1998-11-17

Metjahic, Safet

Photography

With object illumination for exposure

Having artificial illumination termination control

396161, 396164, G03B 1503

Patent

active

058390057

ABSTRACT:
In a flash photographing system having a light receiving circuit arranged to receive a reflected light from an object caused by a light flux emitted from a flash tube and controlling the amount of flash light emission according to the amount of light thus received, the output of the light receiving circuit is inputted to an analog-to-digital conversion circuit to be converted into digital values at intervals of a predetermined period, and an adding process on the digital values is performed to detect the amount of received light, so that the amount of flash light emission is controlled.

REFERENCES:
patent: 4227808 (1980-10-01), Yuasa
patent: 5504552 (1996-04-01), Kotoh et al.
patent: 5581074 (1996-12-01), Yoshida
Patent Abstracts of Japan No. JP 07 151701 A, published Jun. 16, 1995.

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