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Proceedings Paper

Mid-wave IR liquid crystal tunable retarder for spectrapolarimetric imaging
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Paper Abstract

In this paper, the development of a compact, electronically tunable liquid crystal tunable retarder (LCTR) for manipulation of polarization is presented. A LCTR with one-inch aperture diameter has been designed and fabricated for operation over mid-wave IR (MWIR) spectral band. Using this device, quarter and half-wave retardation have been demonstrated at several prominent laser wavelengths in the MWIR spectral region. Up to 74% efficiency has been demonstrated at 2.4 μm wavelength. Highly efficient retarders are now being developed using perfluorinated liquid crystal mixtures. An LCTR is anticipated to guide the development of a compact, wideband, and electronically tunable spectrapolarimetric imager.

Paper Details

Date Published: 27 February 2004
PDF: 7 pages
Proc. SPIE 5268, Chemical and Biological Standoff Detection, (27 February 2004); doi: 10.1117/12.519645
Show Author Affiliations
Narasimha S. Prasad, Coherent Technologies, Inc. (United States)
Kenneth E Arnett, Perdix, Inc. (United States)
Neelam Gupta, Army Research Lab. (United States)


Published in SPIE Proceedings Vol. 5268:
Chemical and Biological Standoff Detection
James O. Jensen; Jean-Marc Theriault, Editor(s)

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