25 October 2012 Modular hyperspectral imager enables multiple research applications
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Abstract
The MR-i spectroradiometer can support a wide range of applications from its architecture suited to multiple configurations. Its modular 4-port FTIR spectroradiometer architecture allows the simultaneous use of two different detector modules, direct or differential input(s) and multiple telescopes. In a given configuration, MR-i can combine a MWIR focal plane array and a LWIR focal plane array to provide an extended spectral range from the two imaging sensors. The two detector array modules are imaging the same scene allowing synchronized pixel-to-pixel spectral range combination. In another configuration, MR-i can combine two identical focal plane arrays with different attenuation factors and two interleaved integration times per detector array. This configuration generates four sets of hyperspectral data cubes with different dynamic ranges that can be combined to produce a single hyperspectral cube with unmatched dynamic range. This configuration is particularly well suited for high-speed, high-dynamic range characterization of targets such as aircrafts, flares, and explosions. In a third configuration, named iCATSI, the spectroradiometer is used in differential input configuration to provide efficient optical background subtraction. The iCATSI configuration features an MCT detectors array with spectral cutoff near 14 µm. This extended spectral range and high sensitivity allows the detection and identification of a wide range of chemicals.
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Nicolas Hô, Florent Prel, Louis Moreau, Hugo Lavoie, François Bouffard, Denis Dubé, Jean-Marc Thériault, Christian Vallières, Claude Roy, "Modular hyperspectral imager enables multiple research applications", Proc. SPIE 8515, Imaging Spectrometry XVII, 851505 (25 October 2012); doi: 10.1117/12.931472; https://doi.org/10.1117/12.931472
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