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Proceedings Paper

LINC-NIRVANA: optical elements of the fringe and flexure tracker
Author(s): Jens Zuther; Andreas Eckart; Thomas Bertram; Matthew Horrobin; Bettina Lindhorst; Uwe Lindhorst; Jörg-Uwe Pott; Christoph Rauch; Steffen Rost; Semir Smajic; Christian Straubmeier; Imke Wank; Udo Beckmann; Rainer Lenzen; Evangelia Tremou
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Paper Abstract

LINC-NIRVANA (LN) is a German /Italian interferometric beam combiner camera for the Large Binocular Telescope. Due to homothetic imaging, LN will make use of an exceptionally large field-of-view. As part of LN, the Fringe-and-Flexure-Tracker system (FFTS) will provide real-time, closed-loop measurement and correction of pistonic and flexure signals induced by the atmosphere and inside the telescope-instrument system. Such compensation is essential for achieving coherent light combination over substantial time intervals (~10min.). The FFTS is composed of a dedicated near-infrared detector, which can be positioned by three linear stages within the curved focal plane of LN. The system is divided into a cryogenic (detector) and ambient (linear stages) temperature environment, which are isolated from each other by a moving baffie. We give an overview of the current design and implementation stage of the FFTS opto-mechanical components. The optical components represent an update of the original design to assess slow image motion induced by the LN instrument separately.

Paper Details

Date Published: 12 September 2012
PDF: 7 pages
Proc. SPIE 8445, Optical and Infrared Interferometry III, 844536 (12 September 2012); doi: 10.1117/12.926017
Show Author Affiliations
Jens Zuther, Univ. zu Köln (Germany)
Andreas Eckart, Univ. zu Köln (Germany)
Thomas Bertram, Max-Planck-Institut für Astronomie (Germany)
Matthew Horrobin, Univ. zu Köln (Germany)
Bettina Lindhorst, Univ. zu Köln (Germany)
Uwe Lindhorst, Univ. zu Köln (Germany)
Jörg-Uwe Pott, Max-Planck-Institut für Astronomie (Germany)
Christoph Rauch, Univ. zu Köln (Germany)
Steffen Rost, Univ. zu Köln (Germany)
Semir Smajic, Univ. zu Köln (Germany)
Christian Straubmeier, Univ. zu Köln (Germany)
Imke Wank, Univ. zu Köln (Germany)
Udo Beckmann, Max-Planck-Institut für Radioastronomie (Germany)
Rainer Lenzen, Max-Planck-Institut für Astronomie (Germany)
Evangelia Tremou, Yonsei Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 8445:
Optical and Infrared Interferometry III
Françoise Delplancke; Jayadev K. Rajagopal; Fabien Malbet, Editor(s)

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