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6 December 1993 Status of the production of 8-m ZERODUR mirror blanks
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Abstract
Several glass blanks have been produced, handled, and machined to their approximate shape before ceramization. The melting and spin casting of glass menisci is completed. One glass meniscus has been ceramized and machined to its final shape. In the present paper the experience gained when performing the different process steps will be presented and discussed. This includes a comparison of the theoretical calculations during the planning phase with actual experimental results. The properties measured so far for the first ZERODUR meniscus all meet the requirements, in many cases surpass them.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wolfgang Pannhorst, Rudolf W. Mueller, Hartmut W. Hoeness, Horst Loch, Hans F. Morian, Helmut Tietze, and Volker Wittmer "Status of the production of 8-m ZERODUR mirror blanks", Proc. SPIE 2018, Passive Materials for Optical Elements II, (6 December 1993); https://doi.org/10.1117/12.165232
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