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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 31 — Nov. 1, 2010
  • pp: G53–G59

Rayleigh laser guide star calibration unit for the Large Binocular Telescope

Christian Schwab and Andrew Rakich  »View Author Affiliations

Applied Optics, Vol. 49, Issue 31, pp. G53-G59 (2010)

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We describe the calibration method to be used for the off-axis laser guide stars at the Large Binocular Telescope’s (LBT’s) advanced Rayleigh guided ground layer adaptive optics system facility and the optical design of a dedicated calibration unit. Several possible solutions for generating artificial stars with the same wavefront as the real beacons were investigated. We find the use of a computer-generated hologram to be the best solution to the problem of producing aberrated light exactly matching that delivered by the primary mirror of the telescope. A detailed design and tolerance analysis is complete and the project is currently moving into the fabrication phase.

© 2010 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(090.1000) Holography : Aberration compensation

ToC Category:
Laser Guide Star System

Original Manuscript: April 20, 2010
Manuscript Accepted: May 21, 2010
Published: June 25, 2010

Christian Schwab and Andrew Rakich, "Rayleigh laser guide star calibration unit for the Large Binocular Telescope," Appl. Opt. 49, G53-G59 (2010)

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  1. J.-G. Cuby, S. Morris, I. Bryson, M. Lehnert, C. Evans, T. Fusco, P. Jagourel, R. Myers, G. Rousset, H. Schnetler, J.-P. Amans, J. Allington-Smith, F. Assemat, S. Beard, F. Chemla, R. Content, N. Dipper, M. Ferrari, E. Gendron, J.-L. Gimenez, P. Hastings, Z. Hubert, E. Hugot, P. Laporte, B. Leroux, F. Madec, B. Neichel, T. Morris, E. Prieto, M. Swinbank, G. Talbot, W. Taylor, F. Vidal, S. Vivès, P. Vola, and M. Wells, “EAGLE: an MOAO fed multi-IFU working in the NIR on the E-ELT,” Proc. SPIE 7014, 70141K (2008). [CrossRef]
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  4. D. Baade, “The concepts for the scientific-technical operation of the very large telescope” in New Observing Modes for the Next Century, Vol. 87 of ASP Conference Series, T.Boroson, J.Davies, and I.Robson, eds. (Astronomical Society of the Pacific, 1996), pp. 37–40.
  5. S. Rabien, N. Ageorges, R. Angel, G. Brusa, J. Brynnel, L. Busoni, R. Davies, M. Deysenroth, S. Esposito, W. Gaessler, R. Genzel, R. Green, M. Haug, M. Llyod- Hart, E. Holzl, E. Masciadri, R. Pogge, A. Quirrenbach, M. Rademaker, H. W. Rix, P. Salinari, T. Schwab, T. Stalcup, J. Storm, M. Thiel, G. Weigelt, and J. Ziegleder, “The Laser Guide Star Program for the LBT,” Proc. SPIE 7015, 701515(2008). [CrossRef]
  6. C. Arcidiacono, M. Lombini, R. Ragazzoni, J. Farinato, E. Diolaiti, A. Baruffolo, P. Bagnara, G. Gentile, L. Schreiber, E. Marchetti, J. Kolb, S. Tordo, R. Donaldson, C. Soenke, S. Oberti, E. Fedrigo, E. Vernet, and N. Hubin, “Layer oriented wavefront sensor for MAD on sky operations,” Proc. SPIE 7015, 701555 (2008). [CrossRef]
  7. C. Schwab, A. Rakich, D. Peter, and S. Aigner, “Design of a CGH corrected calibration objective for the AO system at the Large Binocular Telescope,” presented at the International Optical Design Conference (IODC)/Optical Fabrication and Testing (OF&T), Jackson Hole, Wyoming, 13–17 June 2010.
  8. R. Zehnder, J. H. Burge, and C. Zhao, “Use of computer generated holograms for alignment of complex null correctors,” Proc. SPIE 6273, 62732S (2006). [CrossRef]

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