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23 September 1998 Growth of very large sapphire crystals for optical applications
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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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Frederick Schmid, Henry H. Rogers, Chandra P. Khattak, and D. Mark Felt "Growth of very large sapphire crystals for optical applications", Proc. SPIE 3424, Inorganic Optical Materials, (23 September 1998); https://doi.org/10.1117/12.323762
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