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Proceedings Paper

The warm calibration unit of METIS: optical design and principle of operation
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Paper Abstract

METIS, a mid-infrared imager and spectrograph for the wavelength range 2.9–19μm (astronomical L-, M-, N- and Q-band), will be one of the first three science instruments at the European Extremely Large Telescope (E-ELT). It will provide diffraction limited imaging, coronagraphy, high resolution integral field spectroscopy and low and medium resolution slit spectroscopy. Within the international METIS consortium, the 1st Institute of Physics of the University of Cologne in Germany is responsible for the design, manufacturing, integration and qualification of the Warm Calibration Unit (WCU) of the instrument. The WCU will be a self-contained unit operating at ambient temperature outside of the voluminous METIS dewar, feeding a variety of optical calibration and alignment signals into the optical path of METIS. The functionalities of the WCU will be used for routine daily daytime calibrations after astronomical observing nights and verification of the internal alignment of METIS during assembly, integration and verification (AIV). In this contribution we present the preliminary optical design and principle of operation of the WCU in its current state of the preliminary design phase of METIS.

Paper Details

Date Published: 10 July 2018
PDF: 7 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107028P (10 July 2018); doi: 10.1117/12.2310112
Show Author Affiliations
Christian Straubmeier, Univ. zu Köln (Germany)
Nicola Baccichet, Univ. zu Köln (Germany)
Lucas Labadie, Univ. zu Köln (Germany)
Steffen Rost, Univ. zu Köln (Germany)
Michael Wiest, Univ. zu Köln (Germany)
Andreas Eckart, Univ. zu Köln (Germany)
Max-Planck-Institut fÄur Radioastronomie (Germany)
Bernhard Brandl, Leiden Observatory, Leiden Univ. (Netherlands)
Tibor Agócs, NOVA Optical Infrared Instrumentation Group at ASTRON (Netherlands)
Ronald Roelfsema, NOVA Optical Infrared Instrumentation Group at ASTRON (Netherlands)
Jeffrey Lynn, NOVA Optical Infrared Instrumentation Group at ASTRON (Netherlands)
Felix Bettonvil, Leiden Observatory, Leiden Univ. (Netherlands)
NOVA Optical Infrared Instrumentation Group at ASTRON (Netherlands)


Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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