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Producing large EFG sapphire sheet for VIS-IR (500-5000 nm) window applications

Proc. SPIE 5786, 147 (2005); http://dx.doi.org/10.1117/12.603843

Monday 28 March 2005
Orlando, FL, USA
Window and Dome Technologies and Materials IX
Randal W. Tustison
  • Abstract
John W. Locher, Herb E. Bates, Christopher D. Jones, and Steven A. Zanella

Saint-Gobain Crystals (USA)

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).

© 2005 COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

History
Online Jun 22, 2005
Citation
John W. Locher, Herb E. Bates, Christopher D. Jones and Steven A. Zanella, "Producing large EFG sapphire sheet for VIS-IR (500-5000 nm) window applications", Proc. SPIE 5786, 147 (2005); http://dx.doi.org/10.1117/12.603843

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