The GPI Post-Coronagraph Wavefront Sensing Instrument


Rick Burruss, Randall Bartos, Thang Trinh, Laurent Pueyo, Santos Fregoso, John Angione, Chris Shelton


Jet Propulsion Laboratory


The calibration wavefront system for GPI measures the complex wavefront at the coronograph’s apodized pupil, and provides slow phase corrections to the AO system to mitigate against errors that would cause a loss in contrast. This talk describes 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. The instrument has now been fully assembled and tested against system level requirements. This talk will describe the performance of the as built instrument.

Attached documents

Lyot2010proc s7 poster WallaceK.pdf
PDF, 977.4 kb