21 July 2010 The LINC-NIRVANA fringe and flexure tracker: laboratory tests
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Abstract
LINC-NIRVANA is the NIR homothetic imaging camera for the Large Binocular Telescope (LBT). In close cooperation with the Adaptive Optics systems of LINC-NIRVANA the Fringe and Flexure Tracking System (FFTS) is a fundamental component to ensure a complete and time-stable wavefront correction at the position of the science detector in order to allow for long integration times at interferometric angular resolutions. In this contribution, we present the design and the realization of the ongoing FFTS laboratory tests, taking into account the system requirements. We have to sample the large Field of View and to follow the reference source during science observations to an accuracy of less than 2 microns. In particular, important tests such as cooling tests of cryogenic components and tip - tilt test (the repeatability and the precision under the different inclinations) are presented. The system parameters such as internal flexure and precision are discussed.
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Evangelia Tremou, Andreas Eckart, Matthew Horrobin, Bettina Lindhorst, Lydia Moser, Steffen Rost, Semir Smajic, Christian Straubmeier, Imke Wank, Jens Zuther, and Thomas Bertram "The LINC-NIRVANA fringe and flexure tracker: laboratory tests", Proc. SPIE 7734, Optical and Infrared Interferometry II, 773441 (21 July 2010); doi: 10.1117/12.856731; https://doi.org/10.1117/12.856731
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