CPC G01N 21/3504 (2013.01) [G01J 3/0232 (2013.01); G01J 3/28 (2013.01); G01J 3/36 (2013.01); G01M 3/38 (2013.01); G01N 33/0047 (2013.01); G01J 2003/1213 (2013.01); G01N 2021/1795 (2013.01); G01N 2021/3531 (2013.01); G01N 2201/0221 (2013.01)] | 19 Claims |
1. An infrared (IR) imaging system for detecting a substance, the substance having one or more infrared absorption peaks, the IR imaging system comprising:
an optical detection unit comprising:
an optical detector array having increased sensitivity in a first spectral range corresponding to at least one of the one or more infrared absorption peaks and a decreased sensitivity in a second spectral range outside the one or more infrared absorption peaks, wherein the optical detector array is cooled by a thermo-electric cooler, wherein the second spectral range comprises a wavelength range between 4 microns and 6 microns; and
one or more optical filters configured to selectively pass light in the first spectral range.
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