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Proceedings Paper

Polycrystalline yttrium aluminum garnet (YAG) for IR transparent missile domes and windows
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Paper Abstract

Polycrystalline Yttrium Aluminum Garnet (YAG) is being considered as an attractive material candidate for IR transparent missile domes and reconnaissance windows, due to its superior optical clarity and mechanical properties compared to the incumbent material choices. YAG possesses a very uniform index of refraction with minimal variation. Its fracture strength, hardness, and toughness also rank high among various other optically transparent materials and can be optimized further through grain size minimization. Polycrystalline YAG has been in development for several years at Raytheon for laser gain and IR transparency applications. Recent advances in optical loss characterization and optimization, scale-up efforts, and the fabrication of non-planar geometries such as hemispherical domes will be presented. In addition, the YAG material trade study conducted to date on thermal, optical, mechanical properties are discussed.

Paper Details

Date Published: 4 May 2007
PDF: 12 pages
Proc. SPIE 6545, Window and Dome Technologies and Materials X, 65450E (4 May 2007); doi: 10.1117/12.719521
Show Author Affiliations
J. C. Huie, Raytheon Integrated Defense Systems (United States)
C. B. Dudding, Raytheon Missile Systems (United States)
J. McCloy, Raytheon Missile Systems (United States)


Published in SPIE Proceedings Vol. 6545:
Window and Dome Technologies and Materials X
Randal W. Tustison, Editor(s)

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