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Proceedings Paper

Producing large EFG sapphire sheet for VIS-IR (500-5000 nm) window applications
Author(s): Christopher D. Jones; John W. Locher; Herb E. Bates; 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 average 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: 15 October 2005
PDF: 10 pages
Proc. SPIE 5990, Optically Based Materials and Optically Based Biological and Chemical Sensing for Defence II, 599007 (15 October 2005); doi: 10.1117/12.631151
Show Author Affiliations
Christopher D. Jones, Saint-Gobain Crystals (United States)
John W. Locher, Saint-Gobain Crystals (United States)
Herb E. Bates, Saint-Gobain Crystals (United States)
Steven A. Zanella, Saint-Gobain Crystals (United States)


Published in SPIE Proceedings Vol. 5990:
Optically Based Materials and Optically Based Biological and Chemical Sensing for Defence II
Anthony W. Vere; John C. Carrano; Arturas Zukauskas; James G. Grote; Francois Kajzar, Editor(s)

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