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Proceedings Paper

Recent improvements of high density magnetic deformable mirrors: faster, larger and stronger
Author(s): Julien Charton; Urban Bitenc; Jean-Francois Curis; Sebastien Camet; Romain Di Chiaro; Rozenn Bougeard
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Paper Abstract

The performances of high resolution magnetic deformable mirrors have been recently improved: the mechanical bandwidth has been increased to 2 kHz, and a fast stroboscopic Shack-Harman wavefront was used to measure a settling time as low as 400μs. Recent improvements in the substrate-thinning processes made possible the availability of large, high-quality membranes compatible with deformable mirrors. Prototype testing and simulations show that devices with up to 60x60 actuators are now possible. For open-loop operations, a novel feed-forward algorithm was developed to compensate for residual creeping and improve the DM stability to below10nm RMS over 6 hours.

Paper Details

Date Published: 7 August 2014
PDF: 8 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 914825 (7 August 2014); doi: 10.1117/12.2055872
Show Author Affiliations
Julien Charton, ALPAO S.A.S. (France)
Urban Bitenc, Durham Univ. (United Kingdom)
Jean-Francois Curis, ALPAO S.A.S. (France)
Sebastien Camet, ALPAO S.A.S. (France)
Romain Di Chiaro, ALPAO S.A.S. (France)
Rozenn Bougeard, ALPAO S.A.S. (France)


Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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