Unique mounting for miniature optics at cryogenic temperatures

Zachary N. Leahy; Andrew J. Magner

doi:10.1117/12.2025263

18 September 2013 Unique mounting for miniature optics at cryogenic temperatures

Zachary N. Leahy, Andrew J. Magner

Proceedings Volume 8836, Optomechanical Engineering 2013; 88360N (2013) https://doi.org/10.1117/12.2025263
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

This paper highlights a mounting solution for miniature, high aspect ratio Zinc Selenide (ZnSe) optics capable of sustaining high vibration loads and cryogenic temperatures. The GOES-R Advanced Baseline Imager (ABI) optical design requires ZnSe filters that have a significantly higher-than-standard aspect ratio. The thin structure, along with the material properties of ZnSe, lead to a filter that is very delicate. The mounting technique minimizes stresses induced over thermal extremes, while maintaining sufficient preload for launch loads. The filters are mounted to metallic housings using a spring loaded retainer and compliant materials. Detailed analysis of the mounting and an understanding of the unique material properties enables the design to be successful. Special attention is given to materials passing through glass transition temperatures. This design was qualified through extensive thermal cycling and vibration testing, and exhibited performance acceptable for production.

Citation Download Citation

Zachary N. Leahy and Andrew J. Magner "Unique mounting for miniature optics at cryogenic temperatures", Proc. SPIE 8836, Optomechanical Engineering 2013, 88360N (18 September 2013); https://doi.org/10.1117/12.2025263

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