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Proceedings Paper

Optomechanical design and testing of the VLT tertiary mirrors
Author(s): Wolfgang Bollinger; Hans Joachim Juranek; Stefan Schulte; K. May; Alain Michel
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Paper Abstract

The Tertiary Mirrors for the ESO Very Large Telescope project consist of four optical flats (elliptical, 890 X 1260 mm2). The achieved opto-mechanical design is challenging since it provides high optical overall quality combined with high stiffness (70 Hz Eigenfrequency) and low mass (total mass of 180 kg for the complete unit). Schott (Mainz, Germany) produces the lightweight Zerodur blanks. Carl Zeiss has designed and manufactured the mirror and its support cell. Last not least it became necessary to install the biggest testing equipment for flats in Europe to guarantee for a scientifically correct verification of the quality of the complete unit. All four mirrors have been delivered to ESO.

Paper Details

Date Published: 20 July 2000
PDF: 7 pages
Proc. SPIE 4003, Optical Design, Materials, Fabrication, and Maintenance, (20 July 2000); doi: 10.1117/12.391500
Show Author Affiliations
Wolfgang Bollinger, Carl Zeiss (Germany)
Hans Joachim Juranek, Carl Zeiss (Germany)
Stefan Schulte, Carl Zeiss (Germany)
K. May, Carl Zeiss (Germany)
Alain Michel, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 4003:
Optical Design, Materials, Fabrication, and Maintenance
Philippe Dierickx, Editor(s)

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