The Giant Magellan Telescope laser tomography adaptive optics system

R. Conan, F. Bennet, A. H. Bouchez, M. A. van Dam, B. Espeland, W. Gardhouse, C. d'Orgeville, N. Paulin, P. Piatrou, I. Price, F. Rigaut, G. Trancho, K. Uhlendorf

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

    5 Citations (Scopus)

    Abstract

    Laser tomography adaptive optics (LTAO) will allow Extremely Large Telescope to get nearly di_raction limited images over a large fraction of the sky. For such systems, the sky coverage is limited by the number of natural guide star (NGS) suitable to estimate the tip and tilt (TT) modes of the atmosphere. The LTAO system of the Giant Magellan Telescope is using 6 LGSs launched from the telescope rim and a single NGS to measure the tip-tilt and focus atmospheric modes. A deformable mirror (DM) in open-loop corrects the anisoplanatism error of the NGS wavefront on the TT sensor. The NGS light is shared with 2 truth sensors slowly monitoring the ASM and the DM. End-to-end simulation have shown that the LTAO system exceed the science requirements and has a very high sky coverage.

    Original languageEnglish
    Title of host publication3rd AO4ELT Conference - Adaptive Optics for Extremely Large Telescopes
    PublisherINAF - Osservatorio Astrofisico di Arcetri Largo Enrico Fermi
    ISBN (Print)9788890887604
    DOIs
    Publication statusPublished - 2013
    Event3rd Conference on Adaptive Optics for Extremely Large Telescopes, AO4ELT 2013 - Florence, Italy
    Duration: 26 May 201331 May 2013

    Publication series

    Name3rd AO4ELT Conference - Adaptive Optics for Extremely Large Telescopes

    Conference

    Conference3rd Conference on Adaptive Optics for Extremely Large Telescopes, AO4ELT 2013
    Country/TerritoryItaly
    CityFlorence
    Period26/05/1331/05/13

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