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Proceedings Paper

Optical and crystalline characteristics of large EFG sapphire sheet
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Paper Abstract

Edge Defined Film-fed Growth (EFGTM) Saphikon® sapphire crystals have been grown as large, thick sheet. The sheet is then precision-polished and coated into an infrared or laser transmission compatible window. The sapphire windows are subsequently assembled into a multi-panel configuration for advanced targeting, navigation, or reconnaissance applications. As future aerospace programs will require windows with larger apertures, material characteristics and uniformity such as refractive index homogeneity will increase in importance. Optical measurements, x-ray topography data and rocking curve analysis are presented The crystalline properties as they relate to refractive index inhomogeneity and wave front distortion are discussed.

Paper Details

Date Published: 18 May 2005
PDF: 10 pages
Proc. SPIE 5786, Window and Dome Technologies and Materials IX, (18 May 2005); doi: 10.1117/12.603944
Show Author Affiliations
Herbert E. Bates, Saint-Gobain Crystals (United States)
Christopher D. Jones, Saint-Gobain Crystals (United States)
John W. Locher, Saint-Gobain Crystals (United States)

Published in SPIE Proceedings Vol. 5786:
Window and Dome Technologies and Materials IX
Randal W. Tustison, Editor(s)

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