Surface modification of sapphire for IR window application

Carl J. McHargue; William B. Snyder Jr.

doi:10.1117/12.165222

6 December 1993 Surface modification of sapphire for IR window application

Carl J. McHargue, William B. Snyder Jr.

Proceedings Volume 2018, Passive Materials for Optical Elements II; (1993) https://doi.org/10.1117/12.165222
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Two surface modification techniques, a `super polish' (SP), and ion implantation, were evaluated for improving the mechanical performance of sapphire IR window material. Both techniques increased the average strength as measured by 4-point bend tests and were effective in preventing the propagation of surface flaws. Ion implantation improved the reliability at lower stresses more than the SP. Neither process significantly affected the IR transmission. The SP produced a smoother surface as shown by optical scatter measurements.

Citation Download Citation

Carl J. McHargue and William B. Snyder Jr. "Surface modification of sapphire for IR window application", Proc. SPIE 2018, Passive Materials for Optical Elements II, (6 December 1993); https://doi.org/10.1117/12.165222

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