The optical alignment of the Gemini planet imager adaptive optics bench

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DOIResolve DOI: http://doi.org/10.1117/12.925866
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TypeArticle
Proceedings titleProceedings of SPIE - The International Society for Optical Engineering
ConferenceModern Technologies in Space- and Ground-Based Telescopes and Instrumentation II, 1 July 2012 through 6 July 2012, Amsterdam
ISSN0277-786X
ISBN9780819491510
Volume8450
Article number845058
SubjectAstronomical instrumentation; FaroArm; Gemini telescopes; Off-axis; Optical alignments; Shack-Hartmann wavefront sensors; Helium neon lasers; Mirrors; Optical telescopes; Telescopes; Wavefronts; Alignment
AbstractThe 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. © 2012 SPIE.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Herzberg Institute of Astrophysics (HIA-IHA)
Peer reviewedYes
NPARC number21269210
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Record identifier05acbca5-d024-43d2-b9c3-a946491759ec
Record created2013-12-12
Record modified2016-05-09
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