METIS: the visible and UV coronagraph for solar orbiter

Romoli, M.; Landini, F.; Antonucci, E.; Andretta, V.; Berlicki, A.; Fineschi, S.; Moses, J. D.; Naletto, G.; Nicolosi, P.; Nicolini, G.; Spadaro, D.; Teriaca, Luca; Baccani, C.; Focardi, M.; Pancrazzi, M.; Pucci, S.; Abbo, L.; Bemporad, A.; Capobianco, G.; Massone, G.; Telloni, D.; Magli, E.; Deppo, V. Da; Frassetto, F.; Pelizzo, M. G.; Poletto, L.; Uslenghi, M.; Vives, S.; Malvezzi, M.

doi:10.1117/12.2304274

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METIS: the visible and UV coronagraph for solar orbiter

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Teriaca, Luca
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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Romoli, M., Landini, F., Antonucci, E., Andretta, V., Berlicki, A., Fineschi, S., Moses, J. D., Naletto, G., Nicolosi, P., Nicolini, G., Spadaro, D., Teriaca, L., Baccani, C., Focardi, M., Pancrazzi, M., Pucci, S., Abbo, L., Bemporad, A., Capobianco, G., Massone, G., Telloni, D., Magli, E., Deppo, V. D., Frassetto, F., Pelizzo, M. G., Poletto, L., Uslenghi, M., Vives, S., & Malvezzi, M. (2017). METIS: the visible and UV coronagraph for solar orbiter. In Proceedings Volume 10563, International Conference on Space Optics — ICSO 2014. doi:10.1117/12.2304274.

引用: https://hdl.handle.net/21.11116/0000-0001-1E43-3

要旨

METIS coronagraph is designed to observe the solar corona with an annular field of view from 1.5 to 2.9 degrees in the visible broadband (580-640 nm) and in the UV HI Lyman-alpha, during the Sun close approaching and high latitude tilting orbit of Solar Orbiter. The big challenge for a coronagraph is the stray light rejection. In this paper after a description of the present METIS optical design, the stray light rejection design is presented in detail together with METIS off-pointing strategies throughout the mission. Data shown in this paper derive from the optimization of the optical design performed with Zemax ray tracing and from laboratory breadboards of the occultation system and of the polarimeter.