Methods for polishing large sapphire windows

Jonathan S. Kane; Brian Stuart

doi:10.1117/12.723511

14 May 2007 Methods for polishing large sapphire windows

Jonathan S. Kane, Brian Stuart

Proceedings Volume 10316, Optifab 2007: Technical Digest; 103160E (2007) https://doi.org/10.1117/12.723511
Event: Optifab 2007, 2007, Rochester, New York, United States

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.

Citation Download Citation

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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