2012•Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIERequires access
Imaging polarimetry with the METIS coronagraph of the Solar Orbiter mission
Giuseppe Crescenzio, Silvano Fineschi, Gerardo Capobianco, G. Nicolini, G. Massone, M. A. Malvezzi, Federico Landini, M. Romoli, E. Antonucci
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Abstract
METIS, the "Multi Element Telescope for Imaging and Spectroscopy", is a coronagraph of the Solar Orbiter mission to be launched in 2017. The METIS coronagraph includes three optical paths for i) broad-band imaging of the full corona in polarized visible-light (590-650 nm); ii) narrow-band coronal imaging in the UV HI Ly α (121.6 nm) and extreme-UV He II Ly α (30.4 nm), and iii) spectroscopic observations of the HI and He II Ly α. This presentation describes the optical design of the METIS visible-light path for imaging polarimetry of the K-corona. The achromatic polarimeter's requirements on polarization sensitivity, achromatic response and instrumental polarization control are described. The expected performances of the visible-light path are also presented.