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Proceedings Paper

Designing, manufacturing, and testing of an advanced image slicer prototype for the James Webb Space Telescope
Author(s): Florence Laurent; Charles Macaire; Pierre-Eric Blanc; Eric Prieto; Gabriel Moreaux; Daniel Robert; Pierre Ferruit; Christophe Bonneville; François Hénault; David J. Robertson; Juergen Schmoll
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Paper Abstract

In the frame of an European Space Agency (ESA) contract, a consortium of three European research institutes (Laboratoire d'Astrophysiqu de Marseille, Centre de Recherche Astronomique de Lyon and the University of Durham) and the Cybernetix company have designed, manufactured and tested a prototype of an Integral Field Unit (IFU) for the NIRSpec instrument of the future James Webb Space Telescope (JWST). After a brief presentation of the optical design of this prototype, which is based on the advanced slicer concept, we will focus on the optical tests of this prototype. We will first present the tests peformed at LAM on the individual optical elements prior to their integration in the mechanical structure, as well as the alignment tests conducted as part of the integration procedure. We will then describe the tests and their results in the visible of the complete IFU system both at room temperature (tests performed at CRAL) and at operating temperature (30 K, tests peformed at the University of Durham). Briefly, these tests included: measurements of the characteristics (position, shape, size ...) of the pseudo-slit of the IFU prototype; measurement of the point-spread-function at different locations within its field of view; and measurement of the position, shape and size of the exit pupils. Last, we will conclude on the TRL6 readiness of the advanced image slicer technique and we will provide a glimpse of how wide-spread this technique is becoming both for ground- and space-based applications.

Paper Details

Date Published: 24 September 2004
PDF: 12 pages
Proc. SPIE 5494, Optical Fabrication, Metrology, and Material Advancements for Telescopes, (24 September 2004); doi: 10.1117/12.549459
Show Author Affiliations
Florence Laurent, Observatoire de Lyon (France)
Charles Macaire, Lab. d'Astrophysique de Marseille (France)
Pierre-Eric Blanc, Lab. d'Astrophysique de Marseille (France)
Eric Prieto, Lab. d'Astrophysique de Marseille (France)
Gabriel Moreaux, Lab. d'Astrophysique de Marseille (France)
Daniel Robert, Observatoire de Lyon (France)
Pierre Ferruit, Observatoire de Lyon (France)
Christophe Bonneville, Cybernétix SA (France)
François Hénault, Observatoire de Lyon (France)
David J. Robertson, Univ. of Durham (United Kingdom)
Juergen Schmoll, Univ. of Durham (United Kingdom)


Published in SPIE Proceedings Vol. 5494:
Optical Fabrication, Metrology, and Material Advancements for Telescopes
Eli Atad-Ettedgui; Philippe Dierickx, Editor(s)

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