Update Of Recent Developments For Lightweight Large Mirror Blanks Of Zerodur

H. Tietze; H. Hoeness; A. J. Marker III; H. Fuhrmann

doi:10.1117/12.963573

20 August 1986 Update Of Recent Developments For Lightweight Large Mirror Blanks Of Zerodur

H. Tietze, H. Hoeness, A. J. Marker III, H. Fuhrmann

Proceedings Volume 0628, Advanced Technology Optical Telescopes III; (1986) https://doi.org/10.1117/12.963573
Event: 1986 Astronomy Conferences, 1986, Tucson, United States

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.

Citation Download Citation

H. Tietze, H. Hoeness, A. J. Marker III, and H. Fuhrmann "Update Of Recent Developments For Lightweight Large Mirror Blanks Of Zerodur", Proc. SPIE 0628, Advanced Technology Optical Telescopes III, (20 August 1986); https://doi.org/10.1117/12.963573

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