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Optical Engineering

Broadband beam steering using chalcogenide-based Risley prisms
Author(s): Catalin Florea; Jasbinder S. Sanghera; Ishwar D. Aggarwal
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Paper Abstract

In this paper, we propose using chalcogenide glasses for improved, large-angle, beam steering of infrared radiation, with minimal spectral dispersion and improved thermal performance over wavelength intervals covering the 2 to 12-μm range. For example, we evaluate that full-angle dispersion in the 2 to 5 μm region for LiF/As2S3 combination should be three times smaller than in the case of LiF/ZnS combination. We also evaluate that using the ZnSe/As2Se3 combination will provide twice as small thermal walk-off than a similar ZnS/Ge system in the 8 to 12-μm region.

Paper Details

Date Published: 1 March 2011
PDF: 6 pages
Opt. Eng. 50(3) 033001 doi: 10.1117/1.3551503
Published in: Optical Engineering Volume 50, Issue 3
Show Author Affiliations
Catalin Florea, Global Defense Technology & Systems, Inc. (United States)
Jasbinder S. Sanghera, U.S. Naval Research Lab. (United States)
Ishwar D. Aggarwal, U.S. Naval Research Lab. (United States)

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