19 August 2009 The Gemini Planet Imager calibration testbed
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The calibration wavefront system for GPI will measure the complex wavefront at the apodized pupil and provide slow phase corrections to the AO system to mitigate against errors that would cause a loss in contrast. This talk describes both the low-order and high-order sensors in the calibration wavefront sensor and how the information is combined to form the wavefront estimate before the coronagraph. Expected performance for this wavefront sensor will also be described for typical observing scenarios. Finally, we will show labratory results from our calibration testbed that demonstrate the instrument performance at levels commensurate with those required on the GPI instrument.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. Kent Wallace, Rick Burruss, Laurent Pueyo, Remi Soummer, Chris Shelton, Randall Bartos, Felipe Fregoso, Bijan Nemati, Paul Best, and John Angione "The Gemini Planet Imager calibration testbed", Proc. SPIE 7440, Techniques and Instrumentation for Detection of Exoplanets IV, 74400S (19 August 2009); doi: 10.1117/12.826525; https://doi.org/10.1117/12.826525

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