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6 December 1993 Surface modification of sapphire for IR window application
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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.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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);

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