×

Thermal imaging system and method using scene-average radiation as a thermal reference

  • US 5,136,421 A
  • Filed: 06/29/1990
  • Issued: 08/04/1992
  • Est. Priority Date: 06/29/1990
  • Status: Expired due to Term
First Claim
Patent Images

1. A DCR method, used in a thermal imaging system with an optical path that includes an array of thermal image detectors, for providing a passive source of thermal reference radiation to the thermal image detector array;

  • comprising the steps;

    during selected DCR intervals, redirecting the optical path for the thermal imaging system to include a DCR imaging path such that a redirected optical bundle is introduced into the DCR imaging path as a DCR imaging bundle; and

    in the DCR imaging path, performing optical operations on the DCR imaging bundle and then reintroducing the DCR imaging bundle back into the optical path of the thermal imaging system to form a pupil onto an image of a thermal scene;

    such that scene-average radiation is provided to the thermal image detector array as a thermal reference.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×