Mid-wave IR liquid crystal tunable retarder for spectrapolarimetric imaging

Narasimha S. Prasad; Kenneth E Arnett; Neelam Gupta

doi:10.1117/12.519645

27 February 2004 Mid-wave IR liquid crystal tunable retarder spectrapolarimetric imaging

Narasimha S. Prasad, Kenneth E Arnett, Neelam Gupta

Proceedings Volume 5268, Chemical and Biological Standoff Detection; (2004) https://doi.org/10.1117/12.519645
Event: Optical Technologies for Industrial, Environmental, and Biological Sensing, 2003, Providence, RI, United States

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.

Citation Download Citation

Narasimha S. Prasad, Kenneth E Arnett, and Neelam Gupta "Mid-wave IR liquid crystal tunable retarder spectrapolarimetric imaging", Proc. SPIE 5268, Chemical and Biological Standoff Detection, (27 February 2004); https://doi.org/10.1117/12.519645

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