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

Lisa A. Poyneer; Daren Dillon

doi:10.1117/12.772754

8 February 2008 MEMS adaptive optics for the Gemini Planet Imager: control methods and validation

Lisa A. Poyneer, Daren Dillon

Proceedings Volume 6888, MEMS Adaptive Optics II; 68880H (2008) https://doi.org/10.1117/12.772754
Event: MOEMS-MEMS 2008 Micro and Nanofabrication, 2008, San Jose, California, United States

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.

Citation Download Citation

Lisa A. Poyneer and Daren Dillon "MEMS adaptive optics for the Gemini Planet Imager: control methods and validation", Proc. SPIE 6888, MEMS Adaptive Optics II, 68880H (8 February 2008); https://doi.org/10.1117/12.772754

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