An iterative model for MEMS deformable mirrors

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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)
Title of host publicationAO for ELT 2011 - 2nd International Conference on Adaptive Optics for Extremely Large Telescopes
PublisherOffice National d'Etudes et de Recherches Aerospatiales, ONERA
StatePublished - 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

Fingerprint

Mirrors
Actuators
Adaptive optics
Real time control
Wavefronts
Membranes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Blain, C., Guyon, O., Bradley, C., Martinache, F., & Clergeon, C. (2011). An iterative model for MEMS deformable mirrors. In AO for ELT 2011 - 2nd International Conference on Adaptive Optics for Extremely Large Telescopes Office National d'Etudes et de Recherches Aerospatiales, ONERA.

An iterative model for MEMS deformable mirrors. / Blain, Célia; Guyon, Olivier; Bradley, Colin; Martinache, Frantz; Clergeon, Christophe.

AO for ELT 2011 - 2nd International Conference on Adaptive Optics for Extremely Large Telescopes. Office National d'Etudes et de Recherches Aerospatiales, ONERA, 2011.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Blain, C, Guyon, O, Bradley, C, Martinache, F & Clergeon, C 2011, An iterative model for MEMS deformable mirrors. in AO for ELT 2011 - 2nd International Conference on Adaptive Optics for Extremely Large Telescopes. Office National d'Etudes et de Recherches Aerospatiales, ONERA, 2nd International Conference on Adaptive Optics for Extremely Large Telescopes, AO for ELT 2011, Victoria, BC, Canada, 9/25/11.
Blain C, Guyon O, Bradley C, Martinache F, Clergeon C. An iterative model for MEMS deformable mirrors. In AO for ELT 2011 - 2nd International Conference on Adaptive Optics for Extremely Large Telescopes. Office National d'Etudes et de Recherches Aerospatiales, ONERA. 2011
Blain, Célia ; Guyon, Olivier ; Bradley, Colin ; Martinache, Frantz ; Clergeon, Christophe. / An iterative model for MEMS deformable mirrors. AO for ELT 2011 - 2nd International Conference on Adaptive Optics for Extremely Large Telescopes. Office National d'Etudes et de Recherches Aerospatiales, ONERA, 2011.
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