Enablement and optimization of next generation ground and spaceborne telescope mirrors and structures through engineering and manufacturing advances at SCHOTT AG

Janina Krieg; Thomas Westerhoff; Tony B. Hull

doi:10.1117/12.2575954

20 August 2020 Enablement and optimization of next generation ground and spaceborne telescope mirrors and structures through engineering and manufacturing advances at SCHOTT AG

Janina Krieg, Thomas Westerhoff, Tony B. Hull

Author Affiliations +

Proceedings Volume 11487, Optical Manufacturing and Testing XIII; 1148708 (2020) https://doi.org/10.1117/12.2575954
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

ZERODUR® provides ultimate dimensional stability in monolithic and homogeneous forms ready for the next-generation of requirements for ground and spaceborne mirrors. Already ZERODUR® is providing nearly 10^3 matching meter-class mirrors for ELT and is now the baseline optical material for NASA’s HabEx coronagraph 4-meter diameter lightweight mirror needing 10 picometer stability for 10^3 seconds. We will describe the utility to the optical designer of SCHOTT’s newly dedicated “world class” ZERODUR® competence center capable of machining and precisely characterizing monolithic lightweight mirrors through 4-meter sizes. This facility, and refined manufacturing methods, enable cost-critical missions to evoke design-to-cost paradigms. Both mirror designers and optical finishers can expect a better starting point via precision generation of any optical form on a mirror’s specular surface while minimizing sub-surface damage. Complimentary engineering studies will be discussed.

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Janina Krieg, Thomas Westerhoff, and Tony B. Hull "Enablement and optimization of next generation ground and spaceborne telescope mirrors and structures through engineering and manufacturing advances at SCHOTT AG", Proc. SPIE 11487, Optical Manufacturing and Testing XIII, 1148708 (20 August 2020); https://doi.org/10.1117/12.2575954

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