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14 May 2007 Methods for polishing large sapphire windows
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Abstract
We have investigated various means and methods for processing large Sapphire Windows for use as a multi-spectral pod window. The only available Sapphire in the large dimensions required to date has been A-plane grown Sapphire, which proves to be challenging to maintain both surface and figure simultaneously. Our approach is to break the process into two distinct stages; initial conventional polish which brings in the figure and final post processing which brings in the surface without effecting figure. Using this type of approach we report on our initial findings with regards to Chemical Finishing, and Ion Beam Finishing. We also extended our results to include a comparison of Sapphire to Alon.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jonathan S. Kane and Brian Stuart "Methods for polishing large sapphire windows", Proc. SPIE 10316, Optifab 2007: Technical Digest, 103160E (14 May 2007); https://doi.org/10.1117/12.723511
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