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9 June 2017 Compact LWIR sensors using spatial interferometric technology (Conference Presentation)
Adam L. Bingham, Paul G. Lucey, Edward T. Knobbe
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Proceedings Volume 10210, Next-Generation Spectroscopic Technologies X; 102100M (2017) https://doi.org/10.1117/12.2262414
Event: SPIE Commercial + Scientific Sensing and Imaging, 2017, Anaheim, CA, United States
Abstract
Recent developments in reducing the cost and mass of hyperspectral sensors have enabled more widespread use for short range compositional imaging applications. HSI in the long wave infrared (LWIR) is of interest because it is sensitive to spectral phenomena not accessible to other wavelengths, and because of its inherent thermal imaging capability. At Spectrum Photonics we have pursued compact LWIR hyperspectral sensors both using microbolometer arrays and compact cryogenic detector cameras. Our microbolometer-based systems are principally aimed at short standoff applications, currently weigh 10-15 lbs and feature sizes approximately 20x20x10 cm, with sensitivity in the 1-2 microflick range, and imaging times on the order of 30 seconds. Our systems that employ cryogenic arrays are aimed at medium standoff ranges such as nadir looking missions from UAVs. Recent work with cooled sensors has focused on Strained Layer Superlattice (SLS) technology, as these detector arrays are undergoing rapid improvements, and have some advantages compared to HgCdTe detectors in terms of calibration stability. These sensors include full on-board processing sensor stabilization so are somewhat larger than the microbolometer systems, but could be adapted to much more compact form factors. We will review our recent progress in both these application areas.
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Adam L. Bingham, Paul G. Lucey, and Edward T. Knobbe "Compact LWIR sensors using spatial interferometric technology (Conference Presentation)", Proc. SPIE 10210, Next-Generation Spectroscopic Technologies X, 102100M (9 June 2017); https://doi.org/10.1117/12.2262414
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KEYWORDS
Sensors
Long wavelength infrared
Cryogenics
Imaging systems
Interferometry
Microbolometers
Photonics
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