The Gemini Planet Imager calibration wavefront sensor instrument

J. Kent Wallace; Rick S. Burruss; Randall D. Bartos; Thang Q. Trinh; Laurent A. Pueyo; Santos F. Fregoso; John R. Angione; J. Chris Shelton

doi:10.1117/12.858269

15 July 2010 The Gemini Planet Imager calibration wavefront sensor instrument

J. Kent Wallace, Rick S. Burruss, Randall D. Bartos, Thang Q. Trinh, Laurent A. Pueyo, Santos F. Fregoso, John R. Angione, J. Chris Shelton

Author Affiliations +

Proceedings Volume 7736, Adaptive Optics Systems II; 77365D (2010) https://doi.org/10.1117/12.858269
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

The Gemini Planet Imager is an extreme adaptive optics system that will employ an apodized-pupil coronagraph to make direct detections of faint companions of nearby stars to a contrast level of the 10^-7 within a few lambda/D of the parent star. Such high contrasts from the ground require exquisite wavefront sensing and control both for the AO system as well as for the coronagraph. Un-sensed non-common path phase and amplitude errors after the wavefront sensor dichroic but before the coronagraph would lead to speckles which would ultimately limit the contrast. The calibration wavefront system for GPI will measure the complex wavefront at the system pupil before the apodizer and provide slow phase corrections to the AO system to mitigate errors that would cause a loss in contrast. The calibration wavefront sensor instrument for GPI has been built. We will describe the instrument and its performance.

Citation Download Citation

J. Kent Wallace, Rick S. Burruss, Randall D. Bartos, Thang Q. Trinh, Laurent A. Pueyo, Santos F. Fregoso, John R. Angione, and J. Chris Shelton "The Gemini Planet Imager calibration wavefront sensor instrument", Proc. SPIE 7736, Adaptive Optics Systems II, 77365D (15 July 2010); https://doi.org/10.1117/12.858269

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available