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Methods and systems for remote detection of gases

  • US 7,301,148 B2
  • Filed: 04/23/2003
  • Issued: 11/27/2007
  • Est. Priority Date: 04/23/2003
  • Status: Expired due to Fees
First Claim
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1. A system for remotely detecting at least one constituent of a gas, comprising:

  • a spectrally sensitive receiver positioned at a receiver location, said receiver including an optical component defining a field of view; and

    a first extended source of broadband infrared radiation positioned at a first source location separated from the receiver location, the first source comprising a surface and a heating component thermally coupled to the surface;

    wherein the heating component is configured to heat the surface to a temperature above ambient temperature; and

    wherein the first source and the receiver are oriented such that at least a portion of the surface of the first source is in the field of view;

    wherein the receiver is operable to collect spectral infrared absorption data representative of a first gas present between the first source and the receiver, the heating component being operatively coupled to a temperature controller; and

    further comprising a temperature sensor operative to sense ambient temperature, wherein the temperature controller is operative to control the heating component such that the heating component heats the surface to a substantially uniform temperature that is a predetermined number of degrees higher than ambient temperature sensed by the temperature sensor.

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