Design and realization of an innovative mount for calcium fluoride space optics

Geoffrey K. Torrington; Dennis E. Clingan; Ronald M. Baker; Michael M. Montoya; Benjamin T. Macke

doi:10.1117/12.560282

14 October 2004 Design and realization of an innovative mount for calcium fluoride space optics

Geoffrey K. Torrington, Dennis E. Clingan, Ronald M. Baker, Michael M. Montoya, Benjamin T. Macke

Proceedings Volume 5523, Current Developments in Lens Design and Optical Engineering V; (2004) https://doi.org/10.1117/12.560282
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Calcium fluoride is a desirable material for optical design of space systems in the ultraviolet, visible, and infrared bands. Modern calcium fluoride materials fabricated for the photolithography industry are highly resistant to space radiation. The wide wavelength band and low dispersion are also desirable properties. Unfortunately, calcium fluoride has a host of significant material property issues which hinder its use in the space environment. Low hardness, susceptibility to thermal and mechanical shock, and large coefficient of thermal expansion present significant challenges during development of opto-mechanical designs. Sandia National Laboratories Monitoring Systems and Technology Center has fielded a calcium fluoride based optical system for use in space. The Sandia design solution is based upon a spring-loaded mount which uses no volatile organic compounds. The theory of the Sandia solution is developed and design rules are presented. The Sandia design solution is illustrated for a specific example. Example design and margin calculations are shown. Finally, lessons learned from our design realization and qualification testing efforts are shared for the benefit of the community.

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Geoffrey K. Torrington, Dennis E. Clingan, Ronald M. Baker, Michael M. Montoya, and Benjamin T. Macke "Design and realization of an innovative mount for calcium fluoride space optics", Proc. SPIE 5523, Current Developments in Lens Design and Optical Engineering V, (14 October 2004); https://doi.org/10.1117/12.560282

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KEYWORDS

Calcium

Interfaces

Chemical elements

Lens design

Safety

Astronomical imaging

Optical design

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