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  Optical design of the multi-wavelength imaging coronagraph Metis for the solar orbiter mission

Fineschi, S., Naletto, G., Romoli, M., Deppo, V. D., Antonucci, E., Moses, D., et al. (2020). Optical design of the multi-wavelength imaging coronagraph Metis for the solar orbiter mission. Experimental Astronomy. doi:10.1007/s10686-020-09662-z.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-9734-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-9735-4
Genre: Journal Article

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 Creators:
Fineschi, S., Author
Naletto, G., Author
Romoli, M., Author
Deppo, V. Da, Author
Antonucci, E., Author
Moses, D., Author
Malvezzi, A.M., Author
Nicolini, G., Author
Spadaro, D., Author
Teriaca, Luca1, Author              
Andretta, V., Author
Capobianco, G., Author
Crescenzio, G., Author
Focardi, M., Author
Frassetto, F., Author
Landini, F., Author
Massone, G., Author
Melich, R., Author
Nicolosi, P., Author
Pancrazzi, M., Author
Pelizzo, M.G., AuthorPoletto, L., AuthorSchühle, Udo1, Author              Uslenghi, M., AuthorVives, S., AuthorSolanki, Sami K.1, Author              Heinzel, P., AuthorBerlicki, A., AuthorCesare, S., AuthorMorea, D., AuthorMottini, S., AuthorSandri, P., AuthorAlvarez-Herrero, A., AuthorCastronuovo, M., Author more..
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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 Abstract: This paper describes the innovative optical design of the Metis coronagraph for the Solar Orbiter ESA-NASA mission. Metis is a multi-wavelength, externally occulted telescope for the imaging of the solar corona in both the visible and ultraviolet wavelength ranges. Metis adopts a novel occultation scheme for the solar disk, that we named “inverse external occulter”, for reducing the extremely high thermal load on the instrument at the spacecraft perihelion. The core of the Metis optical design is an aplanatic Gregorian telescope common to both the visible and ultraviolet channels. A suitable dichroic beam-splitter, optimized for transmitting a narrow-band in the ultraviolet (121.6 nm, HI Lyman-α) and reflecting a broadband in the visible (580–640 nm) spectral range, is used to separate the two optical paths. Along the visible light optical path, a liquid crystal electro-optical modulator, used for the first time in space, allows making polarimetric measurements.

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Language(s): eng - English
 Dates: 2020
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1007/s10686-020-09662-z
 Degree: -

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Title: Experimental Astronomy
  Other : Exp. Astron.
Source Genre: Journal
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Publ. Info: Dordrecht : Springer
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 0922-6435
CoNE: https://pure.mpg.de/cone/journals/resource/954925382054