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


    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
    Number of pages10
    ISBN (Print)9780819496164
    Publication statusPublished - 2014
    EventConference on Adaptive Optics Systems IV - Montreal, Canada
    Duration: 22 Jun 201427 Jun 2014

    Publication series

    NameProceedings of SPIE
    ISSN (Print)0277-786X


    ConferenceConference on Adaptive Optics Systems IV


    • interferometry
    • adaptive optics


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