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Proceedings Paper

Recent advancements in multiband IR sensor windows
Author(s): Shyam Bayya; Jasbinder Sanghera; Woohong Kim; Guillermo Villalobos; Ishwar Aggarwal
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Paper Abstract

We have developed several rugged materials for multiband applications in the 0.2-12.0 μm wavelength region. These materials include spinel ceramic and barium gallogermanate (BGG) glass which transmit in the UV, visible, SWIR and MWIR wavelength region. They also include MILTRANTM and IR glasses which transmit in the SWIR, MWIR and LWIR. These materials have superior mechanical and optical properties compared to the currently used materials on various Navy / DoD systems. Spinel ceramic is comparable to sapphire in its ruggedness but it overcomes the birefringence and poor 4-5 μm transmission of sapphire. Spinel has also been made into large size windows as well as domes for several applications. BGG glass is very useful for systems requiring very large windows with visible - MWIR transmission. High optical quality BGG glass windows in sizes up to 20" in diameter have been made. MILTRANTM is > 3 times harder and stronger than ZnS and can provide a rugged window or dome for broadband sensors. IR glass can be easily made in complex shapes. BGG glass and spinel ceramic laminated dome was developed for tri-mode seeker. MILTRANTM and IR glasses can be combined to make achromats for multispectral imaging systems.

Paper Details

Date Published: 1 March 2012
PDF: 9 pages
Proc. SPIE 8257, Optical Components and Materials IX, 825703 (1 March 2012); doi: 10.1117/12.910149
Show Author Affiliations
Shyam Bayya, U.S. Naval Research Lab. (United States)
Jasbinder Sanghera, U.S. Naval Research Lab. (United States)
Woohong Kim, U.S. Naval Research Lab. (United States)
Guillermo Villalobos, U.S. Naval Research Lab. (United States)
Ishwar Aggarwal, Sotera Defense Solutions, Inc. (United States)

Published in SPIE Proceedings Vol. 8257:
Optical Components and Materials IX
Shibin Jiang; Michel J. F. Digonnet; J. Christopher Dries, Editor(s)

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