The use of a high-order MEMS deformable mirror in the Gemini Planet Imager

Lisa A. Poyneer; Brian Bauman; Steven Cornelissen; Joshua Isaacs; Steven Jones; Bruce A. Macintosh; David W. Palmer

doi:10.1117/12.876496

11 February 2011 The use of a high-order MEMS deformable mirror in the Gemini Planet Imager

Lisa A. Poyneer, Brian Bauman, Steven Cornelissen, Joshua Isaacs, Steven Jones, Bruce A. Macintosh, David W. Palmer

Proceedings Volume 7931, MEMS Adaptive Optics V; 793104 (2011) https://doi.org/10.1117/12.876496
Event: SPIE MOEMS-MEMS, 2011, San Francisco, California, United States

Abstract

We briefly review the development history of the Gemini Planet Imager's 4K Boston Micromachines MEMS deformable mirror. We discuss essential calibration steps and algorithms to control the MEMS with nanometer precision, including voltage-phase calibration and influence function characterization. We discuss the integration of the MEMS into GPI's Adaptive Optics system at Lawrence Livermore and present experimental results of 1.5 kHz closed-loop control. We detail mitigation strategies in the coronagraph to reduce the impact of abnormal actuators on final image contrast.

Citation Download Citation

Lisa A. Poyneer, Brian Bauman, Steven Cornelissen, Joshua Isaacs, Steven Jones, Bruce A. Macintosh, and David W. Palmer "The use of a high-order MEMS deformable mirror in the Gemini Planet Imager", Proc. SPIE 7931, MEMS Adaptive Optics V, 793104 (11 February 2011); https://doi.org/10.1117/12.876496

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