15 September 2007 Manufacturing of lightweighted ZERODUR components at SCHOTT
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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, Thorsten Döhring, Armin Thomas, Armin Thomas, Ralf Jedamzik, Ralf Jedamzik, Heiko Kohlmann, Heiko Kohlmann, Peter Hartmann, 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; https://doi.org/10.1117/12.733770
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