Highly variable curvature mirrors for the Very Large Telescope Interferometer

Marc Ferrari; Gerard R. Lemaitre; Silvio P. Mazzanti; Oskar von der Luehe; Bernard di Biagio; Pierre Montiel; Daniel Revest; Patrice Joulie; Jean-Francois Carre

doi:10.1117/12.176116

31 May 1994 Highly variable curvature mirrors for the Very Large Telescope Interferometer

Marc Ferrari, Gerard R. Lemaitre, Silvio P. Mazzanti, Oskar von der Luehe, Bernard di Biagio, Pierre Montiel, Daniel Revest, Patrice Joulie, Jean-Francois Carre

Author Affiliations +

Proceedings Volume 2201, Adaptive Optics in Astronomy; (1994) https://doi.org/10.1117/12.176116
Event: 1994 Symposium on Astronomical Telescopes and Instrumentation for the 21st Century, 1994, Kailua, Kona, HI, United States

Abstract

The design of two holosteric configurations have been optimized for a maximum center/edge deflexure of 400 micrometers . Their thickness distribution is given for active zones of 16 mm in diameter. The curvature action is obtained from an air-pressure chamber that generates onto the rear side of the mirrors (1) a uniform pressure up to 9 Atm or (2) a central force up to 11 daN. The control of the curvature is made by an accurate pressure gauge. Some preliminary results are shown as obtained on metal prototype VCMs from a first fabrication cycle as well as an X-ray device for testing the machining validity of the boundaries at the edge of mirrors.

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Marc Ferrari, Gerard R. Lemaitre, Silvio P. Mazzanti, Oskar von der Luehe, Bernard di Biagio, Pierre Montiel, Daniel Revest, Patrice Joulie, and Jean-Francois Carre "Highly variable curvature mirrors for the Very Large Telescope Interferometer", Proc. SPIE 2201, Adaptive Optics in Astronomy, (31 May 1994); https://doi.org/10.1117/12.176116

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