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Proceedings Paper

ZERODUR mirror blanks for ELTs: technology and production capacity at SCHOTT
Author(s): Thorsten Dohring; Peter Hartmann; Ralf Jedamzik; Armin Thomas
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Paper Abstract

SCHOTT has a history of 100 years in delivering mirror blanks for astronomy. Since more than 30 years the zero expansion glass ceramic material ZERODUR is well recognized in the astronomical community. More than 250 ZERODUR mirror blanks for large segmented telescopes have been successfully produced at SCHOTT and were already delivered to KECK I, KECK II, HET, GTC, and LAMOST. For the increasing world wide demand on large ZERODUR components for industrial applications SCHOTT is presently ramping up its production capacity. The investment in additional melting and ceramisation capabilities are accompanied by improvements of quality assurance and processing technology. SCHOTT is now prepared for a future production of ZERODUR mirror blanks for next generation of Extremely Large Telescopes with diameters of 30 m to 50 m. For other large optical elements needed SCHOTT can supply the requested materials like optical glasses, filter glasses, fused silica and calcium fluoride.

Paper Details

Date Published: 7 July 2004
PDF: 11 pages
Proc. SPIE 5382, Second Backaskog Workshop on Extremely Large Telescopes, (7 July 2004); doi: 10.1117/12.566293
Show Author Affiliations
Thorsten Dohring, SCHOTT GLAS (Germany)
Peter Hartmann, SCHOTT GLAS (Germany)
Ralf Jedamzik, SCHOTT GLAS (Germany)
Armin Thomas, SCHOTT GLAS (Germany)


Published in SPIE Proceedings Vol. 5382:
Second Backaskog Workshop on Extremely Large Telescopes
Arne L. Ardeberg; Torben Andersen, Editor(s)

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