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Multiple band imager and method

  • US 9,013,620 B2
  • Filed: 04/20/2011
  • Issued: 04/21/2015
  • Est. Priority Date: 04/20/2011
  • Status: Active Grant
First Claim
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1. Apparatus for imaging a scene, comprising a focusing structure for focusing light emanating from a scene on an imaging subsystem, and an imaging subsystem including an imager disposed within the optical path of said focusing structure and having an array of pixels sensitive to light at frequencies higher than far infrared frequencies, and a frequency shifter disposed between said focusing structure and said imager, where said frequency shifter includes an array of frequency-shifting elements disposed over a proper subset of said array of pixels, said elements shifting the far infrared frequencies from said focused light to higher frequencies and transmitting the resulting signals to said subset of said array of pixels.

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