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Proceedings Paper

Growth of very large sapphire crystals for optical applications
Author(s): Frederick Schmid; Henry H. Rogers; Chandra P. Khattak; D. Mark Felt
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Paper Abstract

Recent interest in monitoring systems requires very large optical windows that are transmitting over a wide spectral range. Some of the other requirements involve durability, high strength and robustness to withstand severe environments. Therefore, sapphire has been required for these applications. The Heat Exchanger Method (HEM)TM has been used to produce very large sapphire crystals primarily for optical applications. Crystals of 20 cm and 25 cm diameter have been produced in production for over 20 years. Presently, 34 cm diameter boules have been adopted in production, and 50 cm diameter sapphire growth is currently in development. Results of progress and characterization data of the boules will be presented.

Paper Details

Date Published: 23 September 1998
PDF: 10 pages
Proc. SPIE 3424, Inorganic Optical Materials, (23 September 1998); doi: 10.1117/12.323762
Show Author Affiliations
Frederick Schmid, Crystal Systems, Inc. (United States)
Henry H. Rogers, Crystal Systems, Inc. (United States)
Chandra P. Khattak, Crystal Systems, Inc. (United States)
D. Mark Felt, Crystal Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 3424:
Inorganic Optical Materials
Alexander J. Marker, Editor(s)

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