Engineering with lightweight mirrors

Robert E. Parks; Richard W. Wortley; James E. Cannon

doi:10.1117/12.19243

1 July 1990 Engineering with lightweight mirrors

Robert E. Parks, Richard W. Wortley, James E. Cannon

Proceedings Volume 1236, Advanced Technology Optical Telescopes IV; (1990) https://doi.org/10.1117/12.19243
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

The purpose of this paper is to help determine whether or not a lightweight mirror is an appropriate engineering solution in place of a more traditional, solid mirror. The relatively recent manufacture of borosilicate lightweight mirrors both by casting1 and by the Gas Fusion process' make this study timely. Because lightweight borosilicate mirror substrates tend to. be substantially less expensive than the equivalent lightweight substrates made of very low expansion materials, a review of the properties of lightweight mirror structures in general will make it possible to determine if the cost savings of the borosilicate substrates are justified when balanced against the performance of the very low expansion mirror substrate materials.

Citation Download Citation

Robert E. Parks, Richard W. Wortley, and James E. Cannon "Engineering with lightweight mirrors", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19243

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