Selection considerations for astronomical mirror materials: Trade criteria

Tony B. Hull; Thomas Westerhoff; Janina Krieg

doi:10.1117/12.2570454

2 September 2020 Selection considerations for astronomical mirror materials: Trade criteria

Tony B. Hull, Thomas Westerhoff, Janina Krieg

Proceedings Volume 11487, Optical Manufacturing and Testing XIII; 114871D (2020) https://doi.org/10.1117/12.2570454
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

Increasingly, the optimal mirror material trade must reach well beyond textbook material attributes, and consider the richness and applicability of underlying statistically meaningful engineering data. The trade itself will have profound cost and complexity impact in the system implementation, from assembly, integration and test (AIT) through gravity and dynamic loading, and into operation under those influencing factors. Material selection is a multi-parameter decision, having significant performance and cost implications on higher level system attributes. We note that for most situations, an astronomical optical telescope will not be isothermal, and strategies based on this assumption are limited where ultimate performance is expected. Attributes like inhomogeneity or anisotropy of thermal characteristics can dominate. We summarize material attributes that should be considered in material selection, and reference these attributes to those of ZERODUR.

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Tony B. Hull, Thomas Westerhoff, and Janina Krieg "Selection considerations for astronomical mirror materials: Trade criteria", Proc. SPIE 11487, Optical Manufacturing and Testing XIII, 114871D (2 September 2020); https://doi.org/10.1117/12.2570454

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