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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 22 — Oct. 24, 2011
  • pp: 21271–21294

Fast iterative algorithm (FIA) for controlling MEMS deformable mirrors: principle and laboratory demonstration

Célia Blain, Olivier Guyon, Colin Bradley, and Olivier Lardière  »View Author Affiliations


Optics Express, Vol. 19, Issue 22, pp. 21271-21294 (2011)
http://dx.doi.org/10.1364/OE.19.021271


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Abstract

We present a fast and high accuracy iterative algorithm to control Micro-Electro-Mechanical-System (MEMS) deformable mirrors (DMs) for open-loop (OL) adaptive optics (AO) applications. Our approach relies on a simple physical model for the forces applied on DM actuators and membrane, defined by a small number of parameters that we measure in an experimental setup. The algorithm iteratively applies forces and updates actuator displacements, allowing real-time utilization in an Extreme-AO system (control rate ⩾ Khz). Our measurements show that it reproduces Kolmogorov type phase screens with an error equal to 7.3% of the rms of the desired phase (1.6% of the peak-to-valley of the desired phase). This performance corresponds to an improvement of a factor three compared to the standard quadratic model (common relation between voltage and actuator displacement). Originally developed for the DM control of the Subaru Coronagraphic Extreme-AO (SCExAO) project, the algorithm is also suitable for Multi-Object AO systems.

© 2011 OSA

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(230.4040) Optical devices : Mirrors
(010.1285) Atmospheric and oceanic optics : Atmospheric correction
(230.4685) Optical devices : Optical microelectromechanical devices

ToC Category:
Adaptive Optics

History
Original Manuscript: May 23, 2011
Revised Manuscript: July 29, 2011
Manuscript Accepted: September 9, 2011
Published: October 12, 2011

Virtual Issues
Vol. 6, Iss. 11 Virtual Journal for Biomedical Optics

Citation
Célia Blain, Olivier Guyon, Colin Bradley, and Olivier Lardière, "Fast iterative algorithm (FIA) for controlling MEMS deformable mirrors: principle and laboratory demonstration," Opt. Express 19, 21271-21294 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-22-21271


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