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Proceedings Paper

VLTI-PRIMA fringe tracking testbed
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Paper Abstract

One of the key components of the planned VLTI dual feed facility PRIMA is the Fringe Sensor Unit (FSU). Its basic function is the instantaneous measurement of the Optical Path Difference (OPD) between two beams. The FSU acts as the sensor for a complex control system involving optical delay lines and laser metrology with the aim of removing any OPD introduced by the atmosphere and the beam relay. We have initiated a cooperation between ESO and MPE with the purpose of systematically testing this Fringe Tracking Control System in a laboratory environment. This testbed facility is being built at MPE laboratories with the aim to simulate the VLTI and includes FSUs, OPD controller, metrology and in-house built delay lines. In this article we describe this testbed in detail, including the environmental conditions in the laboratory, and present the results of the testbed subsystem characterisation.

Paper Details

Date Published: 28 June 2006
PDF: 8 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 62682Y (28 June 2006); doi: 10.1117/12.671318
Show Author Affiliations
Roberto Abuter, European Southern Observatory (Germany)
Max-Planck-Institut für Extraterrestrische Physik (Germany)
Sebastian Rabien, Max-Planck-Institut für Extraterrestrische Physik (Germany)
Frank Eisenhauer, Max-Planck-Institut für Extraterrestrische Physik (Germany)
Johannes Sahlmann, European Southern Observatory (Germany)
Nicola Di Lieto, European Southern Observatory (Germany)
Marcus Haug, Max-Planck-Institut für Extraterrestrische Physik (Germany)
Anders Wallander, European Southern Observatory (Germany)
Samuel Lévêque, European Southern Observatory (Germany)
Serge Ménardi, European Southern Observatory (Germany)
Françoise Delplancke, European Southern Observatory (Germany)
Nicolas Schuhler, European Southern Observatory (Germany)
Stefan Kellner, Max-Planck-Institut für Extraterrestrische Physik (Germany)
Robert Frahm, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

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