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Proceedings Paper • Open Access

GALEX UV grism for slitless spectroscopy survey
Author(s): Robert Grange; Bruno Milliard; Jean Flamand; Alain Pauget; Gabrielle Waultier; Gabriel Moreaux; Christelle Rossin; Maurice Viton; Michel Neviere

Paper Abstract

The NASA Space Mission Galex is designed to map the history of star formation by performing imaging and spectroscopic surveys in vacuum ultraviolet. The dispersive component for the spectroscopic mode is a CaF2 Grism which can be inserted with loose tolerances in the convergent beam to produce slitless spectra. Grisms are widely used in ground based astronomy in the visible or near infrared bands but the UV cutoff of the resin involved in their manufacturing process prevents their use in the UV range. LAS and Jobin-Yvon developed a proprietary process to imprint the blazed profile into the CaF2 crystal. We will present the measured optical performance of prototypes and flight models delivered this summer to NASA/JPL. We will also present a three bipod flexures mount we designed to minimize the mechanical stress on the optical component. The flight Grism bonded to such a mount has successfully passed the Galex environmental qualification.

Paper Details

Date Published: 21 November 2017
PDF: 8 pages
Proc. SPIE 10569, International Conference on Space Optics — ICSO 2000, 1056908 (21 November 2017); doi: 10.1117/12.2307948
Show Author Affiliations
Robert Grange, Lab. d’Astronomie Spatiale (France)
Bruno Milliard, Lab. d’Astronomie Spatiale (France)
Jean Flamand, Jobin Yvon Groupe Horiba (France)
Alain Pauget, Lab. d’Astronomie Spatiale (France)
Gabrielle Waultier, Lab. d’Astronomie Spatiale (France)
Gabriel Moreaux, Lab. d’Astronomie Spatiale (France)
Christelle Rossin, Lab. d’Astronomie Spatiale (France)
Maurice Viton, Lab. d’Astronomie Spatiale (France)
Michel Neviere, Univ. de Saint-Jérôme (France)


Published in SPIE Proceedings Vol. 10569:
International Conference on Space Optics — ICSO 2000
Georges Otrio, Editor(s)

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