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Proceedings Paper

Smart warping harnesses for active mirrors and stress polishing
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Paper Abstract

We present two ways to generate or compensate for first order optical aberrations using smart warping harnesses. In these cases, we used the same methodology leading to replace a previous actuation system currently on-sky and to get a freeform mirror intended to a demonstrator. Starting from specifications, a warping harness is designed, followed by a meshing model in the finite elements software. For the two projects, two different ways of astigmatism generation are presented. The first one, on the VLT-SPHERE instrument, with a single actuator, is able to generate a nearly pure astigmatism via a rotating motorization. Two actuators are sufficient to produce the same aberration for the active freeform mirror, main part of the OPTICON-FAME project, in order to use stress-polishing method.

Paper Details

Date Published: 22 July 2016
PDF: 11 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 991267 (22 July 2016); doi: 10.1117/12.2232388
Show Author Affiliations
Sabri Lemared, Aix-Marseille Univ., CNRS, Lab. d'Astrophysique de Marseille (France)
Emmanuel Hugot, Aix-Marseille Univ., CNRS, Lab. d'Astrophysique de Marseille (France)
Zalpha Challita, Aix-Marseille Univ., CNRS, Lab. d'Astrophysique de Marseille (France)
Hermine Schnetler, UK Astronomy Technology Ctr. (United Kingdom)
Gabby Kroes, ASTRON (Netherlands)
Michel Marcos, Aix-Marseille Univ., CNRS, Lab. d'Astrophysique de Marseille (France)
Anne Costille, Aix-Marseille Univ., CNRS, Lab. d'Astrophysique de Marseille (France)
Kjetil Dohlen, Aix-Marseille Univ., CNRS, Lab. d'Astrophysique de Marseille (France)
Jean-Luc Beuzit, CNRS, Institut de Planétologie et d’Astrophysique de Grenoble (France)
Jean-Gabriel Cuby, Aix-Marseille Univ., CNRS, Lab. d'Astrophysique de Marseille (France)


Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

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