Constant intensity light source

Details Constant intensity light source Constant intensity light source

1977-09-09

1980-02-26

Pellinen, A. D.

Electricity: power supply or regulation systems

Remote sensing

315158, 323 21, G05F 156

Patent

active

041907957

ABSTRACT:
A power apparatus to maintain a lamp at constant intensity by varying power to the lamp in response to changes in the voltage across a light sensing element. That voltage is automatically compared to a preset reference voltage and the output to the lamp is varied such that any difference in those voltages is eliminated.

REFERENCES:
patent: 3483428 (1969-12-01), La Plante
patent: 3599037 (1971-08-01), Grace
patent: 3675074 (1972-07-01), Dennewitz
patent: 3700960 (1972-10-01), Lake
patent: 3718821 (1973-02-01), Vischulis
patent: 3890537 (1975-06-01), Park et al.
patent: 3927571 (1975-12-01), Athey
patent: 3976910 (1976-08-01), Owens
patent: 3996494 (1976-12-01), Suga

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