An iterative model for MEMS deformable mirrors

Célia Blain, Olivier Guyon, Colin Bradley, Frantz Martinache, Christophe Clergeon

Research output: Contribution to conferencePaper

Abstract

We present a high accuracy Micro-Electro-Mechanical-System (MEMS) deformable mirror (DM) control algorithm currently implemented in the real-time control interface of the Subaru Coronagraphic Extreme Adaptive Optics project (SCExAO). MEMS DMs are an attractive DM technology for Extreme-AO (ExAO) because they offer unprecedented actuator density and actuator counts. ExAO applications require a DM model capable of reproducing a phase map with a precision of few nm rms. The algorithm relies (i) on a physical model of the actuators and the membrane and (ii) on the optimization of DM coefficients and geometrical coefficients, and could be adopted as an open-loop control solution for future MOAO or ExAO ELTs instruments. During the initial tests performed at the UVic AO Lab, the performance of the model reached an open-loop error equal to 7.3% of the rms of the desired phase (1.6% of the peak-to-valley (PV) of the desired phase) with Kolmogorov type wavefronts.

Original languageEnglish (US)
StatePublished - Jan 1 2011
Externally publishedYes
Event2nd International Conference on Adaptive Optics for Extremely Large Telescopes, AO for ELT 2011 - Victoria, BC, Canada
Duration: Sep 25 2011Sep 30 2011

Other

Other2nd International Conference on Adaptive Optics for Extremely Large Telescopes, AO for ELT 2011
CountryCanada
CityVictoria, BC
Period9/25/119/30/11

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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    Blain, C., Guyon, O., Bradley, C., Martinache, F., & Clergeon, C. (2011). An iterative model for MEMS deformable mirrors. Paper presented at 2nd International Conference on Adaptive Optics for Extremely Large Telescopes, AO for ELT 2011, Victoria, BC, Canada.