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Proceedings Paper

Optical design and stray light analysis for the JANUS camera of the JUICE space mission
Author(s): D. Greggio; D. Magrin; M. Munari; M. Zusi; R. Ragazzoni; G. Cremonese; S. Debei; E. Friso; V. Della Corte; P. Palumbo; H. Hoffmann; R. Jaumann; H. Michaelis; N. Schmitz; P. Schipani; L. M. Lara
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Paper Abstract

The JUICE (JUpiter ICy moons Explorer) satellite of the European Space Agency (ESA) is dedicated to the detailed study of Jupiter and its moons. Among the whole instrument suite, JANUS (Jovis, Amorum ac Natorum Undique Scrutator) is the camera system of JUICE designed for imaging at visible wavelengths. It will conduct an in-depth study of Ganymede, Callisto and Europa, and explore most of the Jovian system and Jupiter itself, performing, in the case of Ganymede, a global mapping of the satellite with a resolution of 400 m/px. The optical design chosen to meet the scientific goals of JANUS is a three mirror anastigmatic system in an off-axis configuration. To ensure that the achieved contrast is high enough to observe the features on the surface of the satellites, we also performed a preliminary stray light analysis of the telescope. We provide here a short description of the optical design and we present the procedure adopted to evaluate the stray-light expected during the mapping phase of the surface of Ganymede. We also use the results obtained from the first run of simulations to optimize the baffle design.

Paper Details

Date Published: 23 September 2015
PDF: 9 pages
Proc. SPIE 9626, Optical Systems Design 2015: Optical Design and Engineering VI, 96263J (23 September 2015); doi: 10.1117/12.2206170
Show Author Affiliations
D. Greggio, INAF - Osservatorio Astronomico di Padova (Italy)
Univ. degli Studi di Padova (Italy)
D. Magrin, INAF - Osservatorio Astronomico di Padova (Italy)
M. Munari, INAF - Osservatorio Astrofisico di Catania (Italy)
M. Zusi, INAF - Osservatorio Astronomico di Capodimonte (Italy)
Istituto di Fisica e Planetologia Spaziali (Italy)
R. Ragazzoni, INAF - Osservatorio Astronomico di Padova (Italy)
G. Cremonese, INAF - Osservatorio Astronomico di Padova (Italy)
S. Debei, Univ. degli Studi di Padova (Italy)
E. Friso, Univ. degli Studi di Padova (Italy)
V. Della Corte, Univ. degli Studi di Napoli Federico II (Italy)
P. Palumbo, Univ. degli Studi di Napoli (Italy)
H. Hoffmann, German Aerospace Ctr. (Germany)
R. Jaumann, German Aerospace Ctr. (Germany)
H. Michaelis, German Aerospace Ctr. (Germany)
N. Schmitz, German Aerospace Ctr. (Germany)
P. Schipani, INAF - Osservatorio Astronomico di Capodimonte (Italy)
L. M. Lara, Instituto de Astrofísica de Andalucía - CSIC (Spain)


Published in SPIE Proceedings Vol. 9626:
Optical Systems Design 2015: Optical Design and Engineering VI
Laurent Mazuray; Rolf Wartmann; Andrew P. Wood, Editor(s)

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