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Proceedings Paper

Innovative slicer design and manufacturing
Author(s): Florence Laurent; Edgard Renault; Roland Bacon; Bernard Delabre; Jean-Pierre Dubois; François Hénault; Johan Kosmalski
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Paper Abstract

Glass and metallic image slicer breadboards have been designed, manufactured and tested for MUSE (Multi Unit Spectroscopic Explorer) instrument, a second generation integral field spectrograph developed for the European Southern Observatory (ESO) for the VLT. MUSE is operating in the visible and near IR wavelength range (0.465-0.93 μm) and is composed of 24 identical integral field units; each one incorporates an advanced image slicer associated with a classical spectrograph. This presentation describes the optical design, the manufacturing, component test results (shape, roughness, Bidirectional Reflection Distribution Function - BRDF) and overall system performance (image quality, alignment) of two image slicer breadboards. The first one is made of Zerodur and uses individual optical components polished by a classical method and assembled together by molecular adhesion. This breadboard is a combination of mirrors and mini-lens arrays. The second one is made of metal (copper or invar) using monolithic or segmented optical elements and state-ofthe- art diamond-turning machines. It is composed of two sets of reflective mirrors. We will then conclude with a comparison between these two different breadboards by choosing the most suitable solution for the 24 MUSE image slicers.

Paper Details

Date Published: 6 July 2006
PDF: 12 pages
Proc. SPIE 6273, Optomechanical Technologies for Astronomy, 62732B (6 July 2006); doi: 10.1117/12.670273
Show Author Affiliations
Florence Laurent, CRAL Observatoire de Lyon (France)
Edgard Renault, CRAL Observatoire de Lyon (France)
Roland Bacon, CRAL Observatoire de Lyon (France)
Bernard Delabre, ESO (Germany)
Jean-Pierre Dubois, CRAL Observatoire de Lyon (France)
François Hénault, OCA (France)
Johan Kosmalski, CRAL Observatoire de Lyon (France)

Published in SPIE Proceedings Vol. 6273:
Optomechanical Technologies for Astronomy
Eli Atad-Ettedgui; Joseph Antebi; Dietrich Lemke, Editor(s)

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