Practical aspects of specification of extreme lightweight ZERODUR mirrors for spaceborne missions

Tony Hull; Thomas Westerhoff; Antoine Lays; John Pepi

doi:10.1117/12.2026589

18 September 2013 Practical aspects of specification of extreme lightweight ZERODUR mirrors for spaceborne missions

Tony Hull, Thomas Westerhoff, Antoine Lays, John Pepi

Proceedings Volume 8836, Optomechanical Engineering 2013; 883607 (2013) https://doi.org/10.1117/12.2026589
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Extreme Lightweight ZERODUR® Mirrors, analyzed and described in our recent series of papers, have been demonstrated via a representative 1.2m diameter mirror (88% isogrid lightweighted with f0>200Hz). The attributes of such mirrors are suitable for spaceflight in sizes form < 0.5m to > 4m, while the manufacturing approach is compatible with attractive mirror substrate cost and delivery schedules. We will review manufacturing approach together with recent data on the low magnitude and homogeneity of the coefficient of thermal expansion, and on the toughness of the material. Simple ways to specify these mirrors are summarized.

Citation Download Citation

Tony Hull, Thomas Westerhoff, Antoine Lays, and John Pepi "Practical aspects of specification of extreme lightweight ZERODUR mirrors for spaceborne missions", Proc. SPIE 8836, Optomechanical Engineering 2013, 883607 (18 September 2013); https://doi.org/10.1117/12.2026589

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