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Proceedings Paper

Design, fabrication, integration and commissioning of an upgraded guiding probe for the VLT unit telescope 4
Author(s): Christoph Frank; Peter Hammersley; Bernard Buzzoni; Antonio Manescau; Robin Arsenault; Pierre-Yves Madec; Martin Birkmann; Michael Mueller; Fernando Salgado; Stephane Guisard; Matthias Kroedel
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Paper Abstract

As part of the preparation for the arrival of the MUSE instrument to the VLT, it was required to adapt the hosting telescope (UT4) guide probe, to increase its back focal length. This is to allow enough space for the later deployment of the MUSE Adaptive Optics module GALACSI, in-between the telescope adapter rotator and the instrument itself. The UT guide probe is a critical component for the successful operation of the telescope, so its modification to increase the telescope’s back focal length, while maintaining full compatibility with the existing operation model and other hardware, was rather demanding. The design, manufacture, assembly and test for the new supporting arm in the UT guiding probe is presented. It mixes the use of novel materials (HB-CESIC® for the mirrors substrates) and state of the art manufacturing techniques (3D printing mould production and rapid casting for the support structure), which allow producing easily a high performance subsystem. Characterization of the system prior delivery to the telescope, its integration in the UT and results after commissioning is presented. Its successful implementation has validated new manufacturing techniques that may prove very useful for future instruments development.

Paper Details

Date Published: 18 July 2014
PDF: 15 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 915111 (18 July 2014); doi: 10.1117/12.2055868
Show Author Affiliations
Christoph Frank, European Southern Observatory (Germany)
Peter Hammersley, European Southern Observatory (Germany)
Bernard Buzzoni, European Southern Observatory (Germany)
Antonio Manescau, European Southern Observatory (Germany)
Robin Arsenault, European Southern Observatory (Germany)
Pierre-Yves Madec, European Southern Observatory (Germany)
Martin Birkmann, European Southern Observatory (Germany)
Michael Mueller, European Southern Observatory (Germany)
Fernando Salgado, European Southern Observatory (Chile)
Stephane Guisard, European Southern Observatory (Chile)
Matthias Kroedel, ECM Engineered Ceramic Materials GmbH (Germany)

Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)

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