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Proceedings Paper

CFRP structure for the LBT instrument LINC-NIRVANA
Author(s): Ralf-Rainer Rohloff; Norbert Münch; Armin Böhm; Wolfram Schlossmacher; Carsten Schöppinger; Hartmut Neugeboren; Henrik Wittke; Henning Wichmann
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Paper Abstract

This paper describes the development of a Carbon Fiber-Reinforced Plastics (CFRP) structure for the interferometric instrument LINC-NIRVANA (LN) at the Large Binocular Telescope (LBT) Arizona, USA. This structure carries all components between the two "bent" Gregorian foci of the individual telescopes necessary to combine the light of the two arms coherently. Especially developed for aerospace and defence, CFRP materials now find widespread use across a number of other applications where their special properties are beneficial. We will profit in LN from the good rigidity, high strength, low thermal expansion, low mass and high damping properties of CFRP. An extended Finite Element Analysis was performed to simulate the properties of the structure for different telescope positions and different temperatures. We built a 560 mm x 550 mm x 385 mm test piece of the LN optical bench for flexure tests to confirm the results of the Finite Element Analysis. The complete LN instrument with a mass of 7.5 tons will be mounted at a tilting unit to simulate the different telescope positions.

Paper Details

Date Published: 6 July 2006
PDF: 12 pages
Proc. SPIE 6273, Optomechanical Technologies for Astronomy, 62730Z (6 July 2006); doi: 10.1117/12.671314
Show Author Affiliations
Ralf-Rainer Rohloff, Max-Planck-Institut für Astronomie (Germany)
Norbert Münch, Max-Planck-Institut für Astronomie (Germany)
Armin Böhm, Max-Planck-Institut für Astronomie (Germany)
Wolfram Schlossmacher, Ingenieurbüro Schlossmacher (Germany)
Carsten Schöppinger, INVENT GmbH (Germany)
Hartmut Neugeboren, INVENT GmbH (Germany)
Henrik Wittke, INVENT GmbH (Germany)
Henning Wichmann, INVENT GmbH (Germany)

Published in SPIE Proceedings Vol. 6273:
Optomechanical Technologies for Astronomy
Eli Atad-Ettedgui; Joseph Antebi; Dietrich Lemke, Editor(s)

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