15 September 2007 Manufacturing of lightweighted ZERODUR components at SCHOTT
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Proceedings Volume 6666, Optical Materials and Structures Technologies III; 666602 (2007); doi: 10.1117/12.733770
Event: Optical Engineering + Applications, 2007, San Diego, California, United States
Abstract
There is a broad range of applications for lightweighted components made from ZERODUR(R) glass ceramic. The main markets are secondary and tertiary mirrors for astronomical telescopes, mirrors and structural components for satellites, and mechanical structures for industrial applications, mainly in microlithography. Prominent examples from astronomy are VLT-M3, GEMINI-M2, SOFIA-M1, MAGELLAN-M2, MMT-M2, and METEOSAT-SEVIRI. At SCHOTT components with blind or undercut semiclosed holes are manufactured, typically with circular, hexagonal, rectangular or triangular shapes. The classical grinding process results in weight reduction factors of about 70 %. By additional acid etching technologies even higher lightweighting factors and rib thicknesses below 1 mm have been achieved.
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Thorsten Döhring, Armin Thomas, Ralf Jedamzik, Heiko Kohlmann, Peter Hartmann, "Manufacturing of lightweighted ZERODUR components at SCHOTT", Proc. SPIE 6666, Optical Materials and Structures Technologies III, 666602 (15 September 2007); doi: 10.1117/12.733770; http://dx.doi.org/10.1117/12.733770
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KEYWORDS
Mirrors

Zerodur

Etching

Glasses

Manufacturing

Ceramics

Astronomy

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