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Development of cryogenic mechanisms for the VLT/ERIS instrument
Author(s): Adrian M. Glauser; Walter Bachmann; Polychronis Patapis; Mike MacIntosh; Ric Davies; Helmut Feuchtgruber; Stephen March; David Pearson; Sascha P. Quanz; Christian Rau; William D. Taylor; Hans Martin Schmid; Chris Waring
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Paper Abstract

We present the design and measured performance of the Aperture Wheel and the Pupil and Filter Wheel mechanisms for the NIX camera of the VLT/ERIS instrument. Both mechanisms were developed for high opto-mechanical precision and stability while operating at 70 K. We summarise the design constraints and considerations. Further, we have developed a dedicated cryo-test facility to allow measuring the position repeatability under nominal operational conditions. We demonstrate that the wheel mechanisms perform as designed and provide the measurement methodology and results of the opto-mechanical tolerances.

Paper Details

Date Published: 6 July 2018
PDF: 9 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 1070230 (6 July 2018); doi: 10.1117/12.2313399
Show Author Affiliations
Adrian M. Glauser, ETH Zurich (Switzerland)
Walter Bachmann, ETH Zurich (Switzerland)
Polychronis Patapis, ETH Zurich (Switzerland)
Mike MacIntosh, UK Astronomy Technology Ctr. (United Kingdom)
Ric Davies, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Helmut Feuchtgruber, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Stephen March, ETH Zurich (Switzerland)
David Pearson, UK Astronomy Technology Ctr. (United Kingdom)
Sascha P. Quanz, ETH Zurich (Switzerland)
Christian Rau, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
William D. Taylor, UK Astronomy Technology Ctr. (United Kingdom)
Hans Martin Schmid, ETH Zurich (Switzerland)
Chris Waring, UK Astronomy Technology Ctr. (United Kingdom)

Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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