Flash tube devices with a controllable electrical energy

Details Flash tube devices with a controllable electrical energy Flash tube devices with a controllable electrical energy

1996-02-07

1998-01-06

Le, Que

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250205, 315156, H01J 4014

Patent

active

057058083

ABSTRACT:
A flash device has a flash tube which generates light in response to electrical energy. The amount of light emitted by the flash tube is monitored by a circuit which is connected to means for adjusting the electrical energy supplied to said flash tube when a predetermined amount of light has been emitted to thereby increase the effective life span of the flash tube and maintain intensity level of the flash tube within a given tolerance.

REFERENCES:
patent: 3033988 (1962-05-01), Edgerton
patent: 3350604 (1967-10-01), Erickson
patent: 3648104 (1972-03-01), Ackermann
patent: 3684917 (1972-08-01), Uno et al.
patent: 4249109 (1981-02-01), Ogawa
patent: 5134273 (1992-07-01), Wani et al.
patent: 5151595 (1992-09-01), Filo

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