An ultra-low surface finish process for 6061-Al mirrors

Leonard Wamboldt; Brian Roy; Joseph Crifasi; Shane Stephens; Derek Hanninen; Kenneth Woodard; Robert Felock; Sofia Cunha-Vasconcelos; Stephen Polczwartek; Jeffrey Parenteau

doi:10.1117/12.2177522

26 May 2015 An ultra-low surface finish process for 6061-Al mirrors

Leonard Wamboldt, Brian Roy, Joseph Crifasi, Shane Stephens, Derek Hanninen, Kenneth Woodard, Robert Felock, Sofia Cunha-Vasconcelos, Stephen Polczwartek, Jeffrey Parenteau

Author Affiliations +

Proceedings Volume 9451, Infrared Technology and Applications XLI; 94511X (2015) https://doi.org/10.1117/12.2177522
Event: SPIE Defense + Security, 2015, Baltimore, MD, United States

Abstract

An ultra-low surface finishing process for 6061 T6 type aluminum has been developed by Corning Incorporated, Specialty Materials Division, and has been successfully applied to mirrors up to 13 inches in diameter. This paper presents finish and figure data achieved from the mirror finishing process. Mirror stability is demonstrated through Pre and post thermal cycle surface figure measurements; temperature range of cycle -55°C to +70°C. As an added benefit, the process enables the use of deterministic finishing and enhances the reflective optics resistance to corrosion. Survivability of the reflective optic is evaluated through extended humidity testing.

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Leonard Wamboldt, Brian Roy, Joseph Crifasi, Shane Stephens, Derek Hanninen, Kenneth Woodard, Robert Felock, Sofia Cunha-Vasconcelos, Stephen Polczwartek, and Jeffrey Parenteau "An ultra-low surface finish process for 6061-Al mirrors", Proc. SPIE 9451, Infrared Technology and Applications XLI, 94511X (26 May 2015); https://doi.org/10.1117/12.2177522

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