MUSE optical alignment procedure

Florence Laurent; Edgard Renault; Magali Loupias; Johan Kosmalski; Heiko Anwand; Roland Bacon; Didier Boudon; Patrick Caillier; Eric Daguisé; Jean-Pierre Dubois; Christophe Dupuy; Andreas Kelz; Jean-Louis Lizon; Harald Nicklas; Laurent Parès; Alban Remillieux; Walter Seifert; Hervé Valentin; Wenli Xu

doi:10.1117/12.926975

24 September 2012 MUSE optical alignment procedure

Florence Laurent, Edgard Renault, Magali Loupias, Johan Kosmalski, Heiko Anwand, Roland Bacon, Didier Boudon, Patrick Caillier, Eric Daguisé, Jean-Pierre Dubois, Christophe Dupuy, Andreas Kelz, Jean-Louis Lizon, Harald Nicklas, Laurent Parès, Alban Remillieux, Walter Seifert, Hervé Valentin, Wenli Xu

Author Affiliations +

Proceedings Volume 8446, Ground-based and Airborne Instrumentation for Astronomy IV; 84465X (2012) https://doi.org/10.1117/12.926975
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

MUSE (Multi Unit Spectroscopic Explorer) is a second generation VLT integral field spectrograph (1x1arcmin^² Field of View) developed for the European Southern Observatory (ESO), operating in the visible wavelength range (0.465-0.93 μm). A consortium of seven institutes is currently assembling and testing MUSE in the Integration Hall of the Observatoire de Lyon for the Preliminary Acceptance in Europe, scheduled for 2013. MUSE is composed of several subsystems which are under the responsibility of each institute. The Fore Optics derotates and anamorphoses the image at the focal plane. A Splitting and Relay Optics feed the 24 identical Integral Field Units (IFU), that are mounted within a large monolithic instrument mechanical structure. Each IFU incorporates an image slicer, a fully refractive spectrograph with VPH-grating and a detector system connected to a global vacuum and cryogenic system. During 2011, all MUSE subsystems were integrated, aligned and tested independently in each institute. After validations, the systems were shipped to the P.I. institute at Lyon and were assembled in the Integration Hall This paper describes the end-to-end optical alignment procedure of the MUSE instrument. The design strategy, mixing an optical alignment by manufacturing (plug and play approach) and few adjustments on key components, is presented. We depict the alignment method for identifying the optical axis using several references located in pupil and image planes. All tools required to perform the global alignment between each subsystem are described. The success of this alignment approach is demonstrated by the good results for the MUSE image quality. MUSE commissioning at the VLT (Very Large Telescope) is planned for 2013.

Citation Download Citation

Florence Laurent, Edgard Renault, Magali Loupias, Johan Kosmalski, Heiko Anwand, Roland Bacon, Didier Boudon, Patrick Caillier, Eric Daguisé, Jean-Pierre Dubois, Christophe Dupuy, Andreas Kelz, Jean-Louis Lizon, Harald Nicklas, Laurent Parès, Alban Remillieux, Walter Seifert, Hervé Valentin, and Wenli Xu "MUSE optical alignment procedure", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84465X (24 September 2012); https://doi.org/10.1117/12.926975

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available