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Thermal detector modulation scheme

  • US 5,620,254 A
  • Filed: 03/08/1995
  • Issued: 04/15/1997
  • Est. Priority Date: 03/08/1995
  • Status: Expired due to Fees
First Claim
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1. A thermal detector including:

  • an active detector element which detects radiation from a scene of interest;

    a modulated light source;

    a compensator detector element which detects radiation from said modulated light source; and

    a modulated output which is responsive to an output of said active detector element as compensated by an output of said compensator detector element.

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