Room-temperature filtering for passive infrared imaging
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United States of America Patent
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Mar 22, 2016
Grant Date -
Nov 17, 2011
app pub date -
Jun 28, 2011
filing date -
Jan 27, 2010
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Abstract
A device, for imaging a scene, includes a detector of the radiation that includes a plurality of detector elements, a circularly variable filter, a mechanism for rotating the filter perpendicular to the optical path of the radiation from the scene to the detector, and a data capture apparatus. All the detector elements are repeatedly interrogated by as a group as the filter rotates, to acquire images of the scene, each of which includes a plurality of image portions in respective spectral bands of the filter. The image portions are assembled to form processed images, each of which depicts the scene in a single respective spectral band.
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