Infrared source modulation and system using same
First Claim
1. A method of regulating infrared radiation output from an infrared radiation source comprising:
- applying a time-varying, periodic voltage signal to an infrared radiation source;
measuring a parameter of the voltage signal; and
adjusting the voltage signal to maintain a substantially constant delivered power to such an infrared radiation source, wherein adjusting the voltage signal is accomplished based on the measured parameter and a predetermined relationship between the measured parameter of the voltage signal and a resistance of such an infrared radiation source.
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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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Citations
15 Claims
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1. A method of regulating infrared radiation output from an infrared radiation source comprising:
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applying a time-varying, periodic voltage signal to an infrared radiation source; measuring a parameter of the voltage signal; and adjusting the voltage signal to maintain a substantially constant delivered power to such an infrared radiation source, wherein adjusting the voltage signal is accomplished based on the measured parameter and a predetermined relationship between the measured parameter of the voltage signal and a resistance of such an infrared radiation source. - View Dependent Claims (2, 3, 4)
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5. A method of regulating infrared radiation output from an infrared radiation source comprising:
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applying a voltage pulse to an infrared radiation source, wherein the voltage pulse has a duty cycle less than 100%; measuring a first parameter of the voltage pulse; measuring 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. - View Dependent Claims (6, 7, 8)
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9. A system for generating pulses of infrared radiation comprising:
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an infrared radiation source; a current sensor operatively coupled to the infrared radiation source so as to measure an electrical current passing through the infrared radiation source; a voltage sensor coupled to the infrared radiation source so as to measure an electrical voltage applied to the infrared radiation source; and means for applying electrical pulses to the infrared radiation source such that a substantially constant power is delivered to the infrared radiation source. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification