Electronic flash apparatus of a camera

Details Electronic flash apparatus of a camera Electronic flash apparatus of a camera

1995-11-13

1997-06-17

Perkey, W. B.

Photography

With object illumination for exposure

Multiple flashing from a single unit for a single exposure

396195, G03B 1503

Patent

active

056406223

ABSTRACT:
An electronic flash apparatus of a camera incorporating a focal plane shutter has a capacitor for storing an electric charge, a flashtube for irradiating a subject with a flash of light by the electric charge stored in the capacitor and a setting unit capable of setting any of a signal flash mode in which the flashtube effects a single flash and a high-speed mode in which the flashtube effects high-speed repetitive flash. The apparatus has a voltage setting unit for setting a first voltage as an energizing voltage when the single flash mode is set and setting a second voltage higher than the first voltage as an energizing voltage when the high-speed mode is set and an energizing unit for monitoring a voltage when the capacitor stores the electric charge and energizing a ready light just when the voltage in the storage of the electric charge exceeds the set energizing voltage.

REFERENCES:
patent: 2643597 (1953-06-01), Suzukawa
patent: 4422743 (1983-12-01), Izumi et al.
patent: 4592639 (1986-06-01), Nakamura
patent: 5239336 (1993-08-01), Matsui et al.

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