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Real-time adaptive thermal reference control for night vision systems

  • US 5,920,066 A
  • Filed: 07/16/1997
  • Issued: 07/06/1999
  • Est. Priority Date: 08/02/1996
  • Status: Expired due to Term
First Claim
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1. A system for normalization of an infrared detector having control loops, each said loop including a thermal source and a command system for controlling the temperature of said thermal source including:

  • (a) an error signal source for providing an error signal indicative of the difference between commanded temperature at said thermal source and actual temperature at said thermal source;

    (b) a feedback path from said thermal source to said error signal source providing a signal responsive to the temperature of said thermal source; and

    (c) a compensator coupled between said error signal source and said thermal source, said compensator including;

    (i) a first inverse compensation circuit responsive to said error signal for providing an output;

    (ii) a bandwidth maximizing compensation circuit responsive to the output of said first inverse compensation circuit; and

    (iii) a second inverse compensation circuit responsive to an output of said bandwidth maximizing compensation circuit, said thermal source being responsive to an output of said second inverse compensation circuit.

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