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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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, Tony Hull, Andrew Clarkson, Andrew Clarkson, George Gardopee, George Gardopee, Ralf Jedamzik, Ralf Jedamzik, Antoine Leys, Antoine Leys, John Pepi, John Pepi, François Piché, François Piché, Martin Schäfer, Martin Schäfer, Volker Seibert, Volker Seibert, Armin Thomas, Armin Thomas, Thomas Werner, Thomas Werner, Thomas Westerhoff, 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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