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Proceedings Paper • Open Access

ZERODUR as a dimensionally stable mirror substrate material for spaceborne telescopes

Paper Abstract

Demanding new environmental requirements for earth observation, and for astrophysics, may impose ultrastability requirements on telescope mirrors. Dimensional stability of the mirror material under environmental boundary conditions is as important to the success of a mission, if not more so, than considerations of strength and stiffness. Among these characteristics is the response of the mirror material to variable thermal stimulus. It is found that not only the mirror material’s coefficient of thermal expansion (CTE) is important, but also the homogeneity of the material characteristics. Furthermore the match of thermal characteristics between the mirror material and those of metering structure contributes to maintaining a manageable error budget for operations under various view factors to sun and earth.

Paper Details

Date Published: 12 July 2019
PDF: 11 pages
Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 1118017 (12 July 2019); doi: 10.1117/12.2535962
Show Author Affiliations
Tony Hull, The Univ. of New Mexico (United States)
Antoine Carre, SCHOTT AG (Germany)
Ralf Jedamzik, SCHOTT AG (Germany)


Published in SPIE Proceedings Vol. 11180:
International Conference on Space Optics — ICSO 2018
Zoran Sodnik; Nikos Karafolas; Bruno Cugny, Editor(s)

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