Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Plural load device systems
Patent
1991-06-10
1992-08-11
Perkey, W. B.
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Plural load device systems
315241P, G03B 1505
Patent
active
051383616
ABSTRACT:
An electronic flash control device makes sure that the emission of light of an electronic flash is not impaired by a noise component signal prior to generation of a suitable quantity of light by the flash. A trigger signal is applied by the control device to allow the flash to emit light. An enable signal is supplied to a quenching circuit a predetermined time after the noise of the trigger signal has been produced. When the quantity of light from an object to be photographed by the camera reaches a certain value and the enable signal occurs, the quench circuit suppresses the emission of light by the electronic flash.
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Hashimoto Isamu
Iwamoto Shigeru
Asahi Kogaku Kogyo K.K.
Perkey W. B.
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