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Proceedings Paper

MEMS adaptive optics for the Gemini Planet Imager: control methods and validation
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Paper Abstract

The Gemini Planet Imager (GPI) Adaptive Optics system will use a high-order MEMS deformable mirror for phase compensation. The MEMS mirror will be used in a Woofer-Tweeter configuration, with a frequency-domain based splitting of the phase between the two mirrors. Precise wavefront control depends on the ability to command them MEMS to make the exact phase desired. Non-linearities in the MEMS may prevent this. We determine that influence-function pre-compensation can remove most, but not all, open-loop error. We use simulation and a simulation of a non-linear MEMS to address the issue of how much non-linearity can be tolerated in closed-loop by GPI.

Paper Details

Date Published: 8 February 2008
PDF: 10 pages
Proc. SPIE 6888, MEMS Adaptive Optics II, 68880H (8 February 2008); doi: 10.1117/12.772754
Show Author Affiliations
Lisa A. Poyneer, Lawrence Livermore National Lab. (United States)
Daren Dillon, UCO Lick Observatory, Univ. of California, Santa Cruz (United States)

Published in SPIE Proceedings Vol. 6888:
MEMS Adaptive Optics II
Scot S. Olivier; Thomas G. Bifano; Joel A. Kubby, Editor(s)

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