Multifocal station for the Wendelstein 2m Fraunhofer Telescope

Kerstin Krecker; Maximilian Fabricius; Ralf Bender; Vanessa Fahrenschon; Hubert Gebler; Claus Gössl; Frank Grupp; Oliver Hans; Marco Häuser; Ulrich Hopp; Hanna Kellermann; Florian Lang-Bardl; Wolfgang Mitch; Josef Richter; Surangkhana Rukdee; Roberto Saglia; Sami Wirthensohn

doi:10.1117/12.2560940

13 December 2020 Multifocal station for the Wendelstein 2m Fraunhofer Telescope

Kerstin Krecker, Maximilian Fabricius, Ralf Bender, Vanessa Fahrenschon, Hubert Gebler, Claus Gössl, Frank Grupp, Oliver Hans, Marco Häuser, Ulrich Hopp, Hanna Kellermann, Florian Lang-Bardl, Wolfgang Mitch, Josef Richter, Surangkhana Rukdee, Roberto Saglia, Sami Wirthensohn

Author Affiliations +

Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 1144763 (2020) https://doi.org/10.1117/12.2560940
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The Wendelstein 2 m Telescope has been in regular science operation since 2013. It is equipped with a three channel camera and an Echelle spectrograph called FOCES on one of it’s two Nasmyth foci. FOCES is a wavelength comb stabilized instrument which aims at <1m/s precision. High stability and repeatability of the entire system, including its fiber feed, are required and fast exchange times, between imaging mode and radial velocity measurement, is desirable. We are in the advanced implementation phase of an automated multifocal exchange system to allow for stable and fast exchange between the three different science instruments, a wavefront sensor and a calibration system. We present the final optical design and discuss the mechanical design choices we made in particular with respect to the limited design volume. We will conclude with presenting results from first tests on the system’s optomechanical stability.

Conference Presentation

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Kerstin Krecker, Maximilian Fabricius, Ralf Bender, Vanessa Fahrenschon, Hubert Gebler, Claus Gössl, Frank Grupp, Oliver Hans, Marco Häuser, Ulrich Hopp, Hanna Kellermann, Florian Lang-Bardl, Wolfgang Mitch, Josef Richter, Surangkhana Rukdee, Roberto Saglia, and Sami Wirthensohn "Multifocal station for the Wendelstein 2m Fraunhofer Telescope", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 1144763 (13 December 2020); https://doi.org/10.1117/12.2560940

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