Variable duty cycle arc lamp modulator
The disclosed variable arc lamp modulator comprises a bistable switch
connected in series with an arc lamp and a power supply. The switch is
triggered ON (closed) by a series of pulses of constant frequency from a
clock pulse generator, and the switch is triggered OFF (open) by a series
of pulses from another pulse generator. The time interval between the ON
and OFF pulses is varied in accordance with the impedance of the arc lamp
as detected by a current integrator and a level sensor.
Laakmann; Peter (Los Angeles, CA), Boutin; Charles U. (Tucson, AZ) |
Hughes Aircraft Company
December 22, 1966|
Potenza; J. M.