12 October 2011 Game-changing approaches to affordable advanced lightweight mirrors: Extreme Zerodur lightweighting and relief from the classical polishing parameter constraint
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Proceedings Volume 8125, Optomechanics 2011: Innovations and Solutions; 81250U (2011); doi: 10.1117/12.896571
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States
Abstract
Recent game-changing technology greatly extends the design possibilities and range of applications for aggressively lightweighted open-back Zerodur® mirrors. We have compared several lightweighting design approaches under this new technology. Analytic comparisons are for 1.2m mirrors, all constrained to have a free-free first Eigenfrequency of 200 Hz. Figures of merit include resulting mass, thickness and relative cost. Much more aggressive masses are now available in open-back mirrors, competitive with the more expensive closed-back sandwich mirrors. These breakthroughs are relevant to spaceborne implementation of lightweight mirrors ranging from a few tenths of a meter in diameter to up to 4 meters in diameter.
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Tony Hull, Andrew Clarkson, George Gardopee, Ralf Jedamzik, Antoine Leys, John Pepi, François Piché, Martin Schäfer, Volker Seibert, Armin Thomas, Thomas Werner, Thomas Westerhoff, "Game-changing approaches to affordable advanced lightweight mirrors: Extreme Zerodur lightweighting and relief from the classical polishing parameter constraint", Proc. SPIE 8125, Optomechanics 2011: Innovations and Solutions, 81250U (12 October 2011); doi: 10.1117/12.896571; https://doi.org/10.1117/12.896571
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KEYWORDS
Mirrors

Polishing

Metrology

Lightweight mirrors

Magnetorheological finishing

Manufacturing

Finite element methods

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