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Proceedings Paper

An active optics concept for the multi-object spectrograph EAGLE
Author(s): Fabrice Madec; Emmanuel Hugot; Jean-Luc Gimenez; Fanny Tracol; Marc Ferrari; Pascal Vola; Sébastien Vivès; Kacem El Hadi; Gabriel Moreaux; Eric Prieto; Jean-Gabriel Cuby
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Paper Abstract

The reliability of active optic for telescopes and instrumentation is now good enough to make them available for day to day use in working observatories. Future telescopes and their associated instruments will benefit from this technology to offer innovative concepts, optimal performance and improved reliability. An optical design of the multi-objects spectrograph EAGLE using, active surfaces, is detailed in this article. The first active component is a steering mirror, included in the target acquisition system, able to compensate for large astigmatism variations due to the variable off-axis design. This innovative design also includes two variable curvature mirrors authorising focus compensation and adding a zoom facility. A complete description of these active mirrors mechanical principle is presented, from elasticity theory to opto-mechanical design. The prototypes of these active mirrors with their complete test bench are detailed.

Paper Details

Date Published: 25 July 2008
PDF: 10 pages
Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70182K (25 July 2008); doi: 10.1117/12.788335
Show Author Affiliations
Fabrice Madec, Lab. d'Astrophysique de Marseille (France)
Emmanuel Hugot, Lab. d'Astrophysique de Marseille (France)
Jean-Luc Gimenez, Lab. d'Astrophysique de Marseille (France)
Fanny Tracol, Lab. d'Astrophysique de Marseille (France)
Marc Ferrari, Lab. d'Astrophysique de Marseille (France)
Pascal Vola, Lab. d'Astrophysique de Marseille (France)
Sébastien Vivès, Lab. d'Astrophysique de Marseille (France)
Kacem El Hadi, Lab. d'Astrophysique de Marseille (France)
Gabriel Moreaux, Lab. d'Astrophysique de Marseille (France)
Eric Prieto, Lab. d'Astrophysique de Marseille (France)
Jean-Gabriel Cuby, Lab. d'Astrophysique de Marseille (France)

Published in SPIE Proceedings Vol. 7018:
Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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