Flash unit having a flash output control device

Details Flash unit having a flash output control device Flash unit having a flash output control device

1981-01-19

1982-10-19

Adams, Russell E.

354 60F, 354139, 354145, 354149, G03B 1502

Patent

active

043547508

ABSTRACT:
In a flash unit including a power source portion including a battery and a heavy current consuming source; a flash discharge tube adapted to produce flashlight by the current from the power source portion; flash output control means for metering the reflected flashlight from an object and stopping light emission of the flash discharge tube when a predetermined quantity of light is reached, thereby effecting flash output control operation; and means using the battery as a power source and indicating performance or non-performance of the flash output control operation, there is provided control means for limiting the operation of the heavy current consuming source of the power source portion for a predetermined period during the indication.

REFERENCES:
patent: 4122465 (1978-10-01), Hasegawa et al.
patent: 4162836 (1979-07-01), Harrison
patent: 4201463 (1980-05-01), Harigaya et al.
patent: 4220407 (1980-09-01), Stemme et al.

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