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Proceedings Paper

The optical alignment of the Gemini planet imager adaptive optics bench
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Paper Abstract

The Gemini Planet Imager (GPI) is a facility instrument under construction for the 8-m Gemini South telescope. This paper describes the methods used for optical alignment of the adaptive optics (AO) bench. The optical alignment of the off-axis paraboloid mirrors was done using a pre-alignment method utilizing a HeNe laser and alignment telescopes followed by a fine-tuning using a Shack-Hartmann wavefront sensor and a shear plate. A FARO arm measuring system was used to place the fiducials for the alignment. Using these methods the AO bench was aligned to 13nm RMS of wavefront error.

Paper Details

Date Published: 13 September 2012
PDF: 8 pages
Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 845058 (13 September 2012); doi: 10.1117/12.925866
Show Author Affiliations
John Pazder, National Research Council Canada (Canada)
Herzberg Institute of Astrophysics (Canada)
Brian Bauman, Lawrence Livermore National Lab. (United States)
Daren Dillon, Lick Observatory, Univ. of California, Santa Cruz (United States)
Murray Fletcher, National Research Council Canada (Canada)
Herzberg Institute of Astrophysics (Canada)
Jean Lacoursière, Consultant (Canada)
Vlad Reshetov, National Research Council Canada (Canada)
Herzberg Institute of Astrophysics (Canada)


Published in SPIE Proceedings Vol. 8450:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II
Ramón Navarro; Colin R. Cunningham; Eric Prieto, Editor(s)

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