Computer controlled electronic flash

Details Computer controlled electronic flash Computer controlled electronic flash

1979-02-05

1982-01-19

Hix, L. T.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Plural load device systems

354 60F, 315241P, G03B 1505

Patent

active

043113729

ABSTRACT:
An electronic flash unit has a flash tube and a flash circuit which includes an internal light sensor that interrupts the supply of electricity to the flash tube when it senses that the flash light reflected from an object exceeds a predetermined threshold value. The unit also has a connector for connecting it to an external light sensor and an arrangement for disconnecting the internal sensor from the circuit when connection is made to an external sensor, and vice versa. An adapter circuit is connected to the connector and allows the unit to be used with a camera having its own built-in light sensor so that, when the unit is used with such a camera, the camera sensor performs the function otherwise performed by the internal sensor of the unit.

REFERENCES:
patent: 3846806 (1974-11-01), Yata et al.

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