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Proceedings Paper

Update Of Recent Developments For Lightweight Large Mirror Blanks Of Zerodur
Author(s): H. Tietze; H. Hoeness; A. J. Marker; H. Fuhrmann
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Paper Abstract

The results of a feasibility study on lightweight mirror blanks made of the glass ceramic Zerodur will be reported. This work was performed by Schott under contract to the European Southern Observatory (ESO). The goal of this study was to find the most economical way to produce a lightweighted blank of Zerodur with a diameter of 8m, a radius of curvature of 32m, a center thickness of 0.4m, and a total mass of 15,000 kg. There are three production processes which are technically feasible for the manufacture of lightweighted mirror blanks for earthbound astronomical application. The three different production methods result in different geometrical shapes of the honeycomb structure. The final decision as to which process will be used must take into consideration the differences in total costs and production time.

Paper Details

Date Published: 20 August 1986
PDF: 6 pages
Proc. SPIE 0628, Advanced Technology Optical Telescopes III, (20 August 1986); doi: 10.1117/12.963573
Show Author Affiliations
H. Tietze, Schott Glaswerke (West Germany)
H. Hoeness, Schott Glaswerke (West Germany)
A. J. Marker, Schott Glass Technologies, Inc. (United States)
H. Fuhrmann, Schott Glass Technologies, Inc. (United States)

Published in SPIE Proceedings Vol. 0628:
Advanced Technology Optical Telescopes III
Lawrence D. Barr, Editor(s)

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