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Proceedings Paper • Open Access

Preliminary optical design of the coronagraph for the ASPIICS formation flying mission
Author(s): S. Vivès; P. Lamy; M. Saisse; J.-L. Boit; S. Koutchmy

Paper Abstract

Formation flyers open new perspectives and allow to conceive giant, externally-occulted coronagraphs using a two-component space system with the external occulter on one spacecraft and the optical instrument on the other spacecraft at approximately 100-150 m from the first one. ASPIICS (Association de Satellites Pour l’Imagerie et l’Interfromtrie de la Couronne Solaire) is a mission proposed to ESA in the framework of the PROBA-3 program of formation flying which is presently in phase A to exploit this technique for coronal observations. ASPIICS is composed of a single coronagraph which performs high spatial resolution imaging of the corona as well as 2-dimensional spectroscopy of several emission lines from the coronal base out to 3 R. The selected lines allow to address different coronal regions: the forbidden line of Fe XIV at 530.285 nm (coronal matter), Fe IX/X at 637.4 nm (coronal holes), HeI at 587.6 nm (cold matter). An additional broad spectral channel will image the white light corona so as to derive electron densities. The classical design of an externally occulted coronagraph is adapted to the detection of the very inner corona as close as 1.01 R and the addition of a Fabry-Perot interferometer using a so-called ”etalon”. This paper is dedicated to the description of the optical design and its critical components: the entrance optics and the FabryPerot interferometer.

Paper Details

Date Published: 21 November 2017
PDF: 6 pages
Proc. SPIE 10567, International Conference on Space Optics — ICSO 2006, 105671W (21 November 2017); doi: 10.1117/12.2308042
Show Author Affiliations
S. Vivès, Lab. d'Astrophysique de Marseille (France)
P. Lamy, Lab. d'Astrophysique de Marseille (France)
M. Saisse, Lab. d'Astrophysique de Marseille (France)
J.-L. Boit, Lab. d'Astrophysique de Marseille (France)
S. Koutchmy, Institut d'Astrophysique de Paris (France)

Published in SPIE Proceedings Vol. 10567:
International Conference on Space Optics — ICSO 2006
Errico Armandillo; Josiane Costeraste; Nikos Karafolas, Editor(s)

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