Infrared source modulation and system using same

Details Infrared source modulation and system using same Infrared source modulation and system using same

2007-11-06

2007-11-06

Berman, Jack I. (Department: 2881)

Radiant energy

Radiant energy generation and sources

With radiation modifying member

C250S343000, C250S493100, C250S494100, C250S495100

Reexamination Certificate

active

11149881

ABSTRACT:
A method of modulating an infrared radiation (IR) source that includes applying a time-varying, periodic voltage signal to the IR source, measuring a parameter of the voltage signal, and adjusting the voltage signal to maintain a substantially constant delivered power to the IR source. Adjusting the voltage signal is done based on the measured parameter and a predetermined relationship between the measured parameter of the voltage pulse and a resistance of such an infrared radiation source. Alternatively, the method includes applying a the voltage pulse, measuring a first parameter of the voltage pulse and a second parameter of a current passing through the infrared radiation source resulting from the applying step, and adjusting the voltage pulse to maintain a substantially constant delivered power to the infrared radiation source based on the first parameter and the second parameter.

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patent: 2006/0249681 (2006-11-01), Frodl

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