ARGOS - The laser guide star system for the LBT

S. Rabien*, N. Ageorges, L. Barl, U. Beckmann, T. Blümchen, M. Bonaglia, J. L. Borelli, J. Brynnel, L. Busoni, L. Carbonaro, R. Davies, M. Deysenroth, O. Durney, M. Eiberich, S. Esposito, V. Gasho, W. Gässler, H. Gemperlein, R. Genzel, R. GreenM. Haug, M. Lloyd Hart, P. Hubbard, S. Kanneganti, E. Masciadri, J. Noenickx, G. De Orban Xivry, D. Peter, A. Quirrenbach, M. Rademacher, H. W. Rix, P. Salinari, C. Schwab, J. Storm, L. Strüder, M. Thiel, G. Weigelt, J. Ziegleder

*Corresponding author for this work

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

48 Citations (Scopus)


ARGOS is the Laser Guide Star adaptive optics system for the Large Binocular Telescope. Aiming for a wide field adaptive optics correction, ARGOS will equip both sides of LBT with a multi laser beacon system and corresponding wavefront sensors, driving LBT's adaptive secondary mirrors. Utilizing high power pulsed green lasers the artificial beacons are generated via Rayleigh scattering in earth's atmosphere. ARGOS will project a set of three guide stars above each of LBT's mirrors in a wide constellation. The returning scattered light, sensitive particular to the turbulence close to ground, is detected in a gated wavefront sensor system. Measuring and correcting the ground layers of the optical distortions enables ARGOS to achieve a correction over a very wide field of view. Taking advantage of this wide field correction, the science that can be done with the multi object spectrographs LUCIFER will be boosted by higher spatial resolution and strongly enhanced flux for spectroscopy. Apart from the wide field correction ARGOS delivers in its ground layer mode, we foresee a diffraction limited operation with a hybrid Sodium laser Rayleigh beacon combination.

Original languageEnglish
Title of host publicationAdaptive Optics Systems II
EditorsBrent L. Ellerbroek, Michael Hart, Norbert Hubin, Peter L. Wizinowich
Place of PublicationWashington, DC
Number of pages12
EditionPART 1
ISBN (Print)9780819482266
Publication statusPublished - 2010
Externally publishedYes
EventAdaptive Optics Systems II - San Diego, CA, United States
Duration: 27 Jun 20102 Jul 2010


OtherAdaptive Optics Systems II
CountryUnited States
CitySan Diego, CA


  • Ground layer adaptive optics
  • Large binocular telescope
  • Laser guide stars


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