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Proceedings Paper

Producing large EFG sapphire sheet for VIS-IR (500-5000 nm) window applications
Author(s): John W. Locher; Herb E. Bates; Christopher D. Jones; Steven A. Zanella
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Paper Abstract

EFG sapphire sheet measuring 305 x 510mm and 225 x 660mm have been produced in quantity. The average optical transmission of 6.15 mm thick uncoated polished panels is 84.0% ± 0.5 at 700 nm. This value assures good transmission throughout the 500 to 5000 nm spectral range. Effective absorption coefficients for this spectral range and thickness are calculated and presented. An a verage index inhomogeneity of 6 ppm ± 2 has been measured and is the requirement for panels polished to 0.1λ at this thickness (@633 nm).

Paper Details

Date Published: 18 May 2005
PDF: 7 pages
Proc. SPIE 5786, Window and Dome Technologies and Materials IX, (18 May 2005); doi: 10.1117/12.603843
Show Author Affiliations
John W. Locher, Saint-Gobain Crystals (United States)
Herb E. Bates, Saint-Gobain Crystals (United States)
Christopher D. Jones, Saint-Gobain Crystals (United States)
Steven A. Zanella, 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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