Light source intensity control device

Details Light source intensity control device Light source intensity control device

1993-12-28

1995-04-11

Pascal, Robert J.

Electric lamp and discharge devices: systems

With load device temperature modifier

315116, 315115, 315 49, 315 50, H01J 724

Patent

active

054061725

ABSTRACT:
A light source device having a controlled current source that maintains a constant intensity of light from the source during changes in light source temperature, particularly at warm-up. The light source is heated to speed up warm-up and to maintain constant temperature of the source during operation under varying ambient temperatures. Control of the current to the light source is determined by the temperature profile circuit with signals via a temperature signal conditioner from a temperature sensor proximate to the light source. Control of the heater is ultimately dictated by temperature sensor signals.

REFERENCES:
patent: 2975330 (1961-03-01), Bloom et al.
patent: 4431947 (1984-02-01), Ferriss et al.
patent: 4533853 (1985-08-01), Hammond et al.
patent: 4533854 (1985-08-01), Northrup
patent: 4955029 (1990-09-01), Lecoy et al.

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