Optomechanical design and testing of the VLT tertiary mirrors

Wolfgang Bollinger; Hans Joachim Juranek; Stefan Schulte; K. May; Alain Michel

doi:10.1117/12.391500

20 July 2000 Optomechanical design and testing of the VLT tertiary mirrors

Wolfgang Bollinger, Hans Joachim Juranek, Stefan Schulte, K. May, Alain Michel

Proceedings Volume 4003, Optical Design, Materials, Fabrication, and Maintenance; (2000) https://doi.org/10.1117/12.391500
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

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.

Citation Download Citation

Wolfgang Bollinger, Hans Joachim Juranek, Stefan Schulte, K. May, and Alain Michel "Optomechanical design and testing of the VLT tertiary mirrors", Proc. SPIE 4003, Optical Design, Materials, Fabrication, and Maintenance, (20 July 2000); https://doi.org/10.1117/12.391500

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