Game-changing approaches to affordable advanced lightweight mirrors: Extreme Zerodur lightweighting and relief from the classical polishing parameter constraint

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

doi:10.1117/12.896571

12 October 2011 Game-changing approaches to affordable advanced lightweight mirrors: Extreme Zerodur lightweighting and relief from the classical polishing parameter constraint

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

Author Affiliations +

Proceedings Volume 8125, Optomechanics 2011: Innovations and Solutions; 81250U (2011) https://doi.org/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, and 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); https://doi.org/10.1117/12.896571

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