Publications of the MPIfR Optical & Infrared Interferometry Group

Gaessler, Wolfgang; Ragazzoni, Roberto; Herbst, Thomas M.; Andersen, David R.; Arcidiacono, Carmelo; Baumeister, Harald; Beckmann, Udo; Behrend, Jan; Bertram, Thomas; Bizenberger, Peter; Bohnhardt, Hermann; Briegel, F.; Diolaiti, Emiliano; Driebe, Thomas M.; Eckhardt, A.; Egner, Sebastian E.; Farinato, Jacopo; Heininger, Matthias; Kürster, M.; Laun, Werner; Ligori, Sebastiano; Naranjo, Vianak; Nussbaum, Edmund; Rix, Hans-Walter; Rohloff, Ralf-Rainer; Salinari, Piero; Soci, Roberto; Storz, Clemens; Straubmeier, Christian; Vernet-Viard, Elise; Weigelt, Gerd P.; Weiss, Robert; Xu, Wenli

LINC-NIRVANA: how to get a 23-m wavefront nearly flat

Advancements in Adaptive Optics. Proceedings of SPIE Volume 5490.
Edited by Domenico B. Calia, Brent L. Ellerbroek, and Roberto Ragazzoni: The International Society for Optical Engineering, 2004., p.527-534

Abstract
On the way to the Extremely Large Telescopes (ELT) the Large Binocular Telescope (LBT) is an intermediate step. The two 8.4m mirrors create a masked aperture of 23m. LINC-NIRVANA is an instrument taking advantage of this opportunity. It will get, by means of Multi-Conjugated Adaptive Optics (MCAO), a moderate Strehl Ratio over a 2 arcmin field of view, which is used for Fizeau (imaging) interferometry in J,H and K. Several MCAO concepts, which are proposed for ELTs, will be proven with this instrument. Studies of sub-systems are done in the laboratory and the option to test them on sky are kept open. We will show the implementation of the MCAO concepts and control aspects of the instrument and present the road map to the final installation at LBT. Major milestones of LINC-NIRVANA, like preliminary design review or final design review are already done or in preparation. LINC-NIRVANA is one of the few MCAO instruments in the world which will see first light and go into operation within the next years.

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