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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 31 — Nov. 1, 2010
  • pp: G174–G189

Laboratory characterization and performance of the high-order adaptive optics system for the Large Binocular Telescope

Simone Esposito, Armando Riccardi, Fernando Quirós-Pacheco, Enrico Pinna, Alfio Puglisi, Marco Xompero, Runa Briguglio, Lorenzo Busoni, Luca Fini, Paolo Stefanini, Guido Brusa, Andrea Tozzi, Piero Ranfagni, Francesca Pieralli, Juan C. Guerra, Carmelo Arcidiacono, and Piero Salinari  »View Author Affiliations


Applied Optics, Vol. 49, Issue 31, pp. G174-G189 (2010)
http://dx.doi.org/10.1364/AO.49.00G174


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Abstract

We present the laboratory characterization and performance evaluation of the First Light Adaptive Optics (FLAO), the natural guide star adaptive optics system for the Large Binocular Telescope (LBT). The system uses an adaptive secondary mirror with 672 actuators and a pyramid wavefront sensor with adjustable sampling of the telescope pupil from 30 × 30 down to 7 × 7 subapertures. The system was fully assembled in the Arcetri Observatory laboratories and passed its acceptance test in December 2009. The performance measured at different star magnitudes during the acceptance test is shown to lie between the baseline and the goal specifications. In particular, FLAO obtained a 77% Strehl ratio (SR) in the bright end (8.5 magnitude star in the R band) using an H-band filter and correcting 495 modes with 30 × 30 subaperture sampling. In the faint end (16.4 magnitude), a 5% SR correcting 36 modes with 7 × 7 subapertures was measured. The seeing conditions for these tests were 0.8 arcsec ( r 0 = 0.14 m at 550 nm ) and an average wind speed of 15 m / s . The results for other seeing conditions up to 1.5 arcsec are also presented. The system has been shipped to the LBT site in Arizona, and its commissioning started in March 2010.

© 2010 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.7350) Atmospheric and oceanic optics : Wave-front sensing

ToC Category:
Adaptive Optics System

History
Original Manuscript: April 14, 2010
Revised Manuscript: August 31, 2010
Manuscript Accepted: September 3, 2010
Published: October 21, 2010

Citation
Simone Esposito, Armando Riccardi, Fernando Quirós-Pacheco, Enrico Pinna, Alfio Puglisi, Marco Xompero, Runa Briguglio, Lorenzo Busoni, Luca Fini, Paolo Stefanini, Guido Brusa, Andrea Tozzi, Piero Ranfagni, Francesca Pieralli, Juan C. Guerra, Carmelo Arcidiacono, and Piero Salinari, "Laboratory characterization and performance of the high-order adaptive optics system for the Large Binocular Telescope," Appl. Opt. 49, G174-G189 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-31-G174

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