18 May 2005 Producing large EFG sapphire sheet for VIS-IR (500-5000 nm) window applications
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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 Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John W. Locher, John W. Locher, Herb E. Bates, Herb E. Bates, Christopher D. Jones, Christopher D. Jones, Steven A. Zanella, Steven A. Zanella, } "Producing large EFG sapphire sheet for VIS-IR (500-5000 nm) window applications", Proc. SPIE 5786, Window and Dome Technologies and Materials IX, (18 May 2005); doi: 10.1117/12.603843; https://doi.org/10.1117/12.603843


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