Physics – Optics
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1013..205h&link_type=abstract
Conference on Optical Design Methods, Applications, and Large Optics in Conjunction with the 1. International Congress on Optica
Physics
Optics
Optical Materials
Scientific paper
Besides many other applications ZERODUR is excellently suited for the manufacture of mirror substrates for telescopes. About 80% of all telescopes in the western world with mirror diameters >1.8 m have been equipped with ZERODUR during the last 10 years. New techniques have been developed by Schott for the manufacture of thin monolithic mirror blanks of more than 8 m in diameter. The development of thin meniscus shaped shells using the spin casting technique was successfully completed. Schott has also performed considerable developmental work in the field of lightweighted ZERODUR mirror substrates which can be generated using different techniques: forming of the lightweighted structure during casting, fusion of individual components to a total structure and lightweighting of a massive block by various mechanical machining methods. Several samples have been produced with diameters up to 0.7 m and weights per unit area down to approximately 60 kg/m2.
Hoeness Hartmut W.
Müller Reto
Rodek E. W.
Siebers Friedrich B.
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