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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 308766.0, MPI für Astronomie / Publikationen_mpia
The MCAO wavefront sensing system of LINC-NIRVANA: status report
Authors:Farinato, J.; Ragazzoni, R.; Arcidiacono, C.; Giorgia, G.; Diolaiti, E.; Foppiani, I.; Lombini, M.; Schreiber, L.; Lorenzetti, D.; D'Alessio, F.; Li Causi, G.; Pedichini, F.; Vitali, F.; Herbst, T.; Kürster, M.; Bizenberger, P.; Briegel, F.; De Bonis, F.; Egner, S.; Gässler, W.; Mohr, L.; Pavlov, A.; Rohloff, R. R.; Soci, R.
Date of Publication (YYYY-MM-DD):2006
Title of Proceedings:Advances in Adaptive Optics II
Start Page:627229-1
End Page:9
Title of Series:SPIE
Volume (in Series):6272
Name of Conference/Meeting:Advances in Adaptive Optics
Audience:Not Specified
Abstract / Description: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.
Comment of the Author/Creator:Date: 2006, July 1, 2006
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
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