Method of and apparatus for automatic electronic flash lamp cont

Details Method of and apparatus for automatic electronic flash lamp cont Method of and apparatus for automatic electronic flash lamp cont

1980-10-27

1982-06-22

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

315340, 354128, 354145, H05B 4132

Patent

active

043364810

ABSTRACT:
The amount of light to be produced in an electronic flash lamp apparatus, which is required to take a picture under proper exposure conditions, is predetermined depending on the object distance, the lens diaphragm aperture and the film speed. The actual amount of light produced in the electronic flash lamp apparatus is given as the integrated voltage of a portion only, of the discharge current that flows through the flash discharge tube. The electronic flash lamp apparatus automatically terminates the flash, when agreement between the predetermined and actual amounts of light is reached.

REFERENCES:
patent: 3716752 (1973-02-01), Iwata
patent: 4193677 (1980-03-01), Hasegawa et al.
patent: 4199242 (1980-04-01), Hozomizu et al.
patent: 4256995 (1981-03-01), Ishida

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