Electronic flash system capable of automatic flash duration cont

Details Electronic flash system capable of automatic flash duration cont Electronic flash system capable of automatic flash duration cont

1980-04-03

1981-11-17

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315133, 315136, 315151, H05B 4132

Patent

active

043013929

ABSTRACT:
In an automatic flash duration controllable electronic flash system of the type in which in response to the quantity of light reflected back from a subject illuminated by the flash light emitted from a flash lamp and intercepted by a photosensor circuit or the like, the flash lamp is turned off, a signaling device capable of signaling not only whether or not the voltage stored across a main discharge capacitor has reached to a predetermined level for flash exposure but also whether or not an automatic flash duration control after triggering the flash lamp has been completed.

REFERENCES:
patent: 3898514 (1975-08-01), Takahashi
patent: 4100459 (1978-07-01), Nakamura et al.

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