The CHARA array adaptive optics I: common-path optical and mechanical design, and preliminary on-sky results

Xiao Che*, Laszlo Sturmann, John D. Monnier, Theo A. ten Brummelaar, Judit Sturmann, Stephen T. Ridgway, Michael J. Ireland, Nils H. Turner, Harold A. McAlister

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

Abstract

The CHARA array is an optical interferometer with six 1-meter diameter telescopes, providing baselines from 33 to 331 meters. With sub-milliarcsecond angular resolution, its versatile visible and near infrared combiners offer a unique angle of studying nearby stellar systems by spatially resolving their detailed structures. To improve the sensitivity and scientific throughput, the CHARA array was funded by NSF-ATI in 2011 to install adaptive optics (AO) systems on all six telescopes. The initial grant covers Phase I of the AO systems, which includes on-telescope Wavefront Sensors (WFS) and non-common-path (NCP) error correction. Meanwhile we are seeking funding for Phase II which will add large Deformable Mirrors on telescopes to close the full AO loop. The corrections of NCP error and static aberrations in the optical system beyond the WFS are described in the second paper of this series. This paper describes the design of the common-path optical system and the on-telescope WFS, and shows the on-sky commissioning results.

Original languageEnglish
Title of host publicationAdaptive optics systems IV
EditorsEnrico Marchetti, Laird M. Close, Jean-Pierre Veran
Place of PublicationBellingham, WA
PublisherSPIE
Pages914830-1-914830-10
Number of pages10
ISBN (Print)9780819496164
DOIs
Publication statusPublished - 2014
EventConference on Adaptive Optics Systems IV - Montreal, Canada
Duration: 22 Jun 201427 Jun 2014

Publication series

NameProceedings of SPIE
PublisherSPIE-INT SOC OPTICAL ENGINEERING
Volume9148
ISSN (Print)0277-786X

Conference

ConferenceConference on Adaptive Optics Systems IV
CountryCanada
CityMontreal
Period22/06/1427/06/14

Keywords

  • interferometry
  • adaptive optics

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