Modeling the JANUS stray-light behavior

D. Greggio; M. Munari; D. Magrin; R. Paolinetti; M. Barilli; A. Turella; M. Zusi; V. Della Corte; P. Palumbo; R. Mugnuolo; M. Amoroso; M. Castronuovo; R. Ragazzoni

doi:10.1117/12.2313204

6 July 2018 Modeling the JANUS stray-light behavior

D. Greggio, M. Munari, D. Magrin, R. Paolinetti, M. Barilli, A. Turella, M. Zusi, V. Della Corte, P. Palumbo, R. Mugnuolo, M. Amoroso, M. Castronuovo, R. Ragazzoni

Author Affiliations +

Proceedings Volume 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave; 106984V (2018) https://doi.org/10.1117/12.2313204
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

JANUS is the camera of the ESA mission JUICE, dedicated to high-resolution imaging in the extended-visible wavelength region (340 – 1080nm). The camera will observe Jupiter and its satellites providing detailed maps of their surfaces and atmospheres. During the mission, the camera will face a huge variety of observing scenarios ranging from the imaging of the surfaces of the satellites under varying illumination conditions to limb observation of the atmospheres. The stray-light performance of JANUS has been studied through non-sequential ray-tracing simulations with the aim to characterize and optimize the design. The simulations include scattering effects produced by micro-roughness and particulate contamination of the optical surfaces, the diffusion from mechanical surfaces and ghost reflections from refractive elements. The results have been used to derive the expected stray-light performance of the instrument and to validate the instrument design.

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D. Greggio, M. Munari, D. Magrin, R. Paolinetti, M. Barilli, A. Turella, M. Zusi, V. Della Corte, P. Palumbo, R. Mugnuolo, M. Amoroso, M. Castronuovo, and R. Ragazzoni "Modeling the JANUS stray-light behavior", Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106984V (6 July 2018); https://doi.org/10.1117/12.2313204

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