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Proceedings Paper • Open Access

On-ground tests of the NISP infrared spectrometer instrument for Euclid
Author(s): Cyril Jomni; Anne Ealet; William Gillard; Éric Prieto; Frank U. Grupp

Paper Abstract

Euclid is an ESA mission dedicated to understand the acceleration of the expansion of the Universe. The mission will measure hundred of millions of galaxies in spectrophotometry and photometry in the near infrared thanks to a spectro-photometer called NISP. This instrument will be assembled and tested in Marseille. To prepare the on-ground test plan and develop the test procedure, we have used simulated PSF images, based on a Zemax optical design of the instrument. We have developed the analysis tools that will be further used to build the procedure verification. We present here the method and analysis results to adjust the focus of the instrument. We will in particular show that because of the sampling of the PSF, a dithering strategy should be adapted and will constraint the development of the test plan.

Paper Details

Date Published: 25 September 2017
PDF: 8 pages
Proc. SPIE 10562, International Conference on Space Optics — ICSO 2016, 105625M (25 September 2017); doi: 10.1117/12.2296245
Show Author Affiliations
Cyril Jomni, Ctr. de Physique des Particules de Marseille (France)
Anne Ealet, Ctr. de Physique des Particules de Marseille (France)
William Gillard, Ctr. de Physique des Particules de Marseille (France)
Éric Prieto, Lab. d'Astrophysique de Marseille (France)
Frank U. Grupp, Max-Planck-Institut für extraterresrische Physik (Germany)

Published in SPIE Proceedings Vol. 10562:
International Conference on Space Optics — ICSO 2016
Bruno Cugny; Nikos Karafolas; Zoran Sodnik, Editor(s)

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