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

Conference · Fri Dec 17 00:00:00 EST 2010

DOI:https://doi.org/10.1117/12.876496· OSTI ID:1018800

Poyneer, L A; Bauman, B; Cornelissen, S; Jones, S; Macintosh, B; Palmer, D; Isaacs, J

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.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 1018800
• Report Number(s): LLNL-CONF-464837; TRN: US201114%%341
• Resource Relation: Journal Volume: 7931; Conference: Presented at: MEMS Adaptive Optics V, San Frnacisco, CA, United States, Jan 27 - Jan 27, 2011
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ACCURACY
ACTUATORS
ALGORITHMS
CALIBRATION
CLOSED-LOOP CONTROL
MIRRORS
MITIGATION
OPTICS