VLTI-PRIMA fringe tracking testbed

Roberto Abuter; Sebastian Rabien; Frank Eisenhauer; Johannes Sahlmann; Nicola Di Lieto; Marcus Haug; Anders Wallander; Samuel Lévêque; Serge Ménardi; Françoise Delplancke; Nicolas Schuhler; Stefan Kellner; Robert Frahm

doi:10.1117/12.671318

28 June 2006 VLTI-PRIMA fringe tracking testbed

Roberto Abuter, Sebastian Rabien, Frank Eisenhauer, Johannes Sahlmann, Nicola Di Lieto, Marcus Haug, Anders Wallander, Samuel Lévêque, Serge Ménardi, Françoise Delplancke, Nicolas Schuhler, Stefan Kellner, Robert Frahm

Author Affiliations +

Proceedings Volume 6268, Advances in Stellar Interferometry; 62682Y (2006) https://doi.org/10.1117/12.671318
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

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.

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Roberto Abuter, Sebastian Rabien, Frank Eisenhauer, Johannes Sahlmann, Nicola Di Lieto, Marcus Haug, Anders Wallander, Samuel Lévêque, Serge Ménardi, Françoise Delplancke, Nicolas Schuhler, Stefan Kellner, and Robert Frahm "VLTI-PRIMA fringe tracking testbed", Proc. SPIE 6268, Advances in Stellar Interferometry, 62682Y (28 June 2006); https://doi.org/10.1117/12.671318

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