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18 August 2009 A portable solid-state high-spectral resolution hyperspectral imager
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An imager based upon an etched liquid-crystal Fabry-Perot (LCFP) dispersive element is able to simultaneously sample four distinct resolution elements in the region 800 nm - 1100 nm, and tune in milliseconds to any one of 30,661 possible four-color scene images with a spectral resolution of 0.67 nm. Independently tunable quadrants of a single LCFP etalon are created by etching a transparent conducting layer on the etalon substrate, and one image from each quadrant is formed on a focal-plane array detector. Designed to weigh less than 20 lbs. in production, the portable, solid-state camera system is designed to provide fast RGB images of transient spectral phenomena, but many applications are possible. The fourth image in each four-element image is intended to be a background channel for contrast enhancement in bright background environments. The LCFP hyperspectral imager provides high-spectral resolution, allowing detection of short-lifetime atomic spectral line emissions characteristic of excited or ablating constituents against a bright, broadband, greybody background. High luminosity via the characteristic Fabry-Perot étendue advantage and an f/0.9 optical system accommodate the tactical need for a lightweight device with a small footprint. The LCFP dispersive element is tuned with battery-pack power, 0- 10V DC and mA current. The LCFP hyperspectral technology is easily adapted to Doppler imaging by enhancing the etalon gap and sampling over a narrower instrument passband. Operation in the MWIR and LWIR is also possible. The camera design creates multi-spectral images with a small but simultaneously sampled data-cube of narrow bandwidth.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. Noto, S. Watchorn, R. B. Kerr, J. Riccobono, M. A. Migliozzi, and J. L. Semeter "A portable solid-state high-spectral resolution hyperspectral imager", Proc. SPIE 7457, Imaging Spectrometry XIV, 74570N (18 August 2009);

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