13 September 2012 LINC-NIRVANA Pathfinder: testing the next generation of wave front sensors at LBT
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Abstract
LINC-NIRVANA will employ four wave front sensors to realize multi-conjugate correction on both arms of a Fizeau interferometer for LBT. Of these, one of the two ground-layer wave front sensors, together with its infrared test camera, comprise a stand-alone test platform for LINC-NIRVANA. Pathfinder is a testbed for full LINC-NIRVANA intended to identify potential interface problems early in the game, thus reducing both technical, and schedule, risk. Pathfinder will combine light from multiple guide stars, with a pyramid sensor dedicated to each star, to achieve ground-layer AO correction via an adaptive secondary: the 672-actuator thin shell at the LBT. The ability to achieve sky coverage by optically coadding light from multiple stars has been previously demonstrated; and the ability to achieve correction with an adaptive secondary has also been previously demonstrated. Pathfinder will be the first system at LBT to combine both of these capabilities. Since reporting our progress at A04ELT2, we have advanced the project in three key areas: definition of specific goals for Pathfinder tests at LBT, more detail in the software design and planning, and calibration. We report on our progress and future plans in these three areas, and on the project overall.
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Albert R. Conrad, Albert R. Conrad, Carmelo Arcidiacono, Carmelo Arcidiacono, Harald Baumeister, Harald Baumeister, Maria Bergomi, Maria Bergomi, Thomas Bertram, Thomas Bertram, Juergen Berwein, Juergen Berwein, Chris Biddick, Chris Biddick, Peter Bizenberger, Peter Bizenberger, Matthieu Brangier, Matthieu Brangier, Florian Briegel, Florian Briegel, Alessandro Brunelli, Alessandro Brunelli, Joar Brynnel, Joar Brynnel, Lorenzo Busoni, Lorenzo Busoni, Norm Cushing, Norm Cushing, Fulvio De Bonis, Fulvio De Bonis, Michele De La Pena, Michele De La Pena, Simone Esposito, Simone Esposito, Jacopo Farinato, Jacopo Farinato, Luca Fini, Luca Fini, Richard F. Green, Richard F. Green, Tom Herbst, Tom Herbst, Ralph Hofferbert, Ralph Hofferbert, Frank Kittmann, Frank Kittmann, Martin Kuerster, Martin Kuerster, Werner Laun, Werner Laun, Daniel Meschke, Daniel Meschke, Lars Mohr, Lars Mohr, Aleksei Pavlov, Aleksei Pavlov, Jorg-Uwe Pott, Jorg-Uwe Pott, Alfio Puglisi, Alfio Puglisi, Roberto Ragazzoni, Roberto Ragazzoni, Andrew Rakich, Andrew Rakich, Ralf-Rainer Rohloff, Ralf-Rainer Rohloff, Jan Trowitzsch, Jan Trowitzsch, Valentina Viotto, Valentina Viotto, Xianyu Zhang, Xianyu Zhang, } "LINC-NIRVANA Pathfinder: testing the next generation of wave front sensors at LBT", Proc. SPIE 8447, Adaptive Optics Systems III, 84470V (13 September 2012); doi: 10.1117/12.925650; https://doi.org/10.1117/12.925650
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