DIVIDED-APERATURE INFRA-RED SPECTRAL IMAGING SYSTEM FOR CHEMICAL DETECTION
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Abstract
A divided-aperture infrared spectral imaging (DAISI) system that is structured to provide identification of target chemical content in a single imaging shot based on spectrally-multiplexed operation. The system is devoid of spectral scanning acquisition of infrared (IR) spectral signatures of target content with an IR detector and does not require content.
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Citations
19 Claims
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1. (canceled)
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2. (canceled)
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3. An infrared (IR) imaging system, the imaging system comprising:
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an optical system including an optical focal plane array (FPA) unit, the optical system including components associated with two optical channels, said two optical channels being spatially and spectrally different from one another, each of the two optical channels positioned to transfer IR radiation incident on the optical system towards the optical FPA unit, the optical FPA unit comprising two groups of detector pixels disposed at a distance from two corresponding focusing lenses; a thermal reference, wherein radiation emitted from the thermal reference directed towards the optical FPA unit is received by at least one of the two groups of detector pixels simultaneously with radiation emitted from a scene viewed by the imaging system; and a data-processing system, said data-processing system configured to; acquire a plurality of frames with the two groups of detector pixels having regions in the plurality of image frames that correspond to light of the thermal reference; and dynamically calibrate the two groups of detector pixels based on a measurements obtained by the two groups of detector pixels using the light received from the thermal reference. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification