Charge completion detecting device for flash photography system

Details Charge completion detecting device for flash photography system Charge completion detecting device for flash photography system

1983-03-01

1984-08-07

Adams, Russell E.

35412711, G03B 700, G03B 1503

Patent

active

044640390

ABSTRACT:
An electric signal of a level which corresponds to a required amount of flash light based on flash exposure conditions e.g. film sensitivity, aperture value and object distance data in a camera is fed to an electronic flash device. A charge completion detecting device in the electronic flash device compares this level of the electric signal from the camera with a charging level of a main capacitor, and outputs a charge completion signal when the charging level reaches a given level corresponding to the level of the electric signal from the camera. By this charge completion signal, flash firing and flash photography is enabled.

REFERENCES:
patent: 3953864 (1976-04-01), Iwata et al.
patent: 4196988 (1980-04-01), Kawasaki
patent: 4225218 (1980-09-01), Numata

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