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Proceedings Paper • Open Access

Electro-mechanical deformable mirror for space application
Author(s): Sébastien Theis; Laurent Ropert; Vincent Costes; Laurent Cadiergues; Paul Sauvageot

Paper Abstract

ACMAS program, in partnership with CNES and DGA, intends to develop an innovative concept of deformable mirror (DM) for next generation space telescopes, to manufacture an engineering model and to test it on optical and mechanical points of view.
The design of this space compatible DM is based on ISP System’s technology, and is adapted to space constraints (ECSS) particularly in terms of vibrations and reliability. These electro-mechanical DMs offer some innovative characteristics for space telescopes with low speed wavefront variations.
A specific version of the patented AME actuator is developed for space applications, and tested to TRL6. The deformable mirror’s actuators pattern is optimized in terms of quantity and position with respect to the wavefront corrections expected to apply during mission. The DM design is optimized thanks to finite element modeling in order to withstand the vibrations and shocks due to launching, and improve thermo-mechanical stability, and an innovative redundancy method is developed.
The performance of an engineering model is measured using an optical test bench with high resolution wavefront sensor. The correction thermal stability is also measured and the performance with one and two disabled actuators is evaluated. Vibrations are then injected into the DM. All these measures are compared to simulation values and show an impressive correlation..

Paper Details

Date Published: 12 July 2019
PDF: 9 pages
Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 1118072 (12 July 2019); doi: 10.1117/12.2536173
Show Author Affiliations
Sébastien Theis, ISP System (France)
Laurent Ropert, ISP System (France)
Vincent Costes, Ctr. National d'Études Spatiales (France)
Laurent Cadiergues, Ctr. National d'Études Spatiales (France)
Paul Sauvageot, ISP System (France)


Published in SPIE Proceedings Vol. 11180:
International Conference on Space Optics — ICSO 2018
Zoran Sodnik; Nikos Karafolas; Bruno Cugny, Editor(s)

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