The MCAO wavefront sensing system of LINC-NIRVANA: status report

Jacopo Farinato; Roberto Ragazzoni; Carmelo Arcidiacono; Gentile Giorgia; Emiliano Diolaiti; Italo Foppiani; Matteo Lombini; Laura Schreiber; Dario Lorenzetti; Francesco D'Alessio; Gianluca Li Causi; Fernando Pedichini; Fabrizio Vitali; Tom Herbst; Martin Kürster; Peter Bizenberger; Florian Briegel; Fulvio De Bonis; Sebastian Egner; Wolfgang Gässler; Lars Mohr; Alexei Pavlov; Ralf Rainer Rohloff; Roberto Soci

doi:10.1117/12.673083

28 June 2006 The MCAO wavefront sensing system of LINC-NIRVANA: status report

Jacopo Farinato, Roberto Ragazzoni, Carmelo Arcidiacono, Gentile Giorgia, Emiliano Diolaiti, Italo Foppiani, Matteo Lombini, Laura Schreiber, Dario Lorenzetti, Francesco D'Alessio, Gianluca Li Causi, Fernando Pedichini, Fabrizio Vitali, Tom Herbst, Martin Kürster, Peter Bizenberger, Florian Briegel, Fulvio De Bonis, Sebastian Egner, Wolfgang Gässler, Lars Mohr, Alexei Pavlov, Ralf Rainer Rohloff, Roberto Soci

Author Affiliations +

Proceedings Volume 6272, Advances in Adaptive Optics II; 627229 (2006) https://doi.org/10.1117/12.673083
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

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.

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Jacopo Farinato, Roberto Ragazzoni, Carmelo Arcidiacono, Gentile Giorgia, Emiliano Diolaiti, Italo Foppiani, Matteo Lombini, Laura Schreiber, Dario Lorenzetti, Francesco D'Alessio, Gianluca Li Causi, Fernando Pedichini, Fabrizio Vitali, Tom Herbst, Martin Kürster, Peter Bizenberger, Florian Briegel, Fulvio De Bonis, Sebastian Egner, Wolfgang Gässler, Lars Mohr, Alexei Pavlov, Ralf Rainer Rohloff, and Roberto Soci "The MCAO wavefront sensing system of LINC-NIRVANA: status report", Proc. SPIE 6272, Advances in Adaptive Optics II, 627229 (28 June 2006); https://doi.org/10.1117/12.673083

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