Paper Abstract

LINC-NIRVANA is an infrared camera that will work in Fizeau interferometric way at the Large Binocular Telescope (LBT). The two beams that will be combined in the camera are corrected by an MCAO system, aiming to cancel the turbulence in a scientific field of view of 2 arcminutes. The MCAO wavefront sensors will be two for each arm, with the task to sense the atmosphere at two different altitudes (the ground one and a second height variable between a few kilometers and a maximum of 15 kilometers). The first wavefront sensor, namely the Ground layer Wavefront sensor (GWS), will drive the secondary adaptive mirror of LBT, while the second wavefront sensor, namely the Mid High layer Wavefront Sensor (MHWS) will drive a commercial deformable mirror which will also have the possibility to be conjugated to the same altitude of the correspondent wavefront sensor. The entire system is of course duplicated for the two telescopes, and is based on the Multiple Field of View (MFoV) Layer Oriented (LO) technique, having thus different FoV to select the suitable references for the two wavefront sensor: the GWS will use the light of an annular field of view from 2 to 6 arcminutes, while the MHWS will use the central 2 arcminutes part of the FoV. After LINC-NIRVANA has accomplished the final design review, we describe the MFoV wavefront sensing system together with its current status.

Paper Details

Date Published: 28 June 2006
PDF: 9 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 627229 (28 June 2006); doi: 10.1117/12.673083
Show Author Affiliations
Jacopo Farinato, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Roberto Ragazzoni, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Carmelo Arcidiacono, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Gentile Giorgia, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Emiliano Diolaiti, INAF, Osservatorio Astronomico di Bologna (Italy)
Italo Foppiani, INAF, Osservatorio Astronomico di Bologna (Italy)
Matteo Lombini, INAF, Osservatorio Astronomico di Bologna (Italy)
Laura Schreiber, INAF, Osservatorio Astronomico di Bologna (Italy)
Dario Lorenzetti, INAF, Osservatorio Astronomico di Roma (Italy)
Francesco D'Alessio, INAF, Osservatorio Astronomico di Roma (Italy)
Gianluca Li Causi, INAF, Osservatorio Astronomico di Roma (Italy)
Fernando Pedichini, INAF, Osservatorio Astronomico di Roma (Italy)
Fabrizio Vitali, INAF, Osservatorio Astronomico di Roma (Italy)
Tom Herbst, Max Planck Institut für Astronomie (Germany)
Martin Kürster, Max Planck Institut für Astronomie (Germany)
Peter Bizenberger, Max Planck Institut für Astronomie (Germany)
Florian Briegel, Max Planck Institut für Astronomie (Germany)
Fulvio De Bonis, Max Planck Institut für Astronomie (Germany)
Sebastian Egner, Max Planck Institut für Astronomie (Germany)
Wolfgang Gässler, Max Planck Institut für Astronomie (Germany)
Lars Mohr, Max Planck Institut für Astronomie (Germany)
Alexei Pavlov, Max Planck Institut für Astronomie (Germany)
Ralf Rainer Rohloff, Max Planck Institut für Astronomie (Germany)
Roberto Soci, Max Planck Institut für Astronomie (Germany)


Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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