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Proceedings Paper

Focal plane instrument for the Solar UV-Vis-IR Telescope aboard SOLAR-C
Author(s): Yukio Katsukawa; Yoshinori Suematsu; Toshifumi Shimizu; Kiyoshi Ichimoto; Norihide Takeyama
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Paper Abstract

It is presented the conceptual design of a focal plane instrument for the Solar UV-Vis-IR Telescope (SUVIT) aboard the next Japanese solar mission SOLAR-C. A primary purpose of the telescope is to achieve precise as well as high resolution spectroscopic and polarimetric measurements of the solar chromosphere with a big aperture of 1.5 m, which is expected to make a significant progress in understanding basic MHD processes in the solar atmosphere. The focal plane instrument consists of two packages: A filtergraph package is to get not only monochromatic images but also Dopplergrams and magnetograms using a tunable narrow-band filter and interference filters. A spectrograph package is to perform accurate spectro-polarimetric observations for measuring chromospheric magnetic fields, and is employing a Littrow-type spectrograph. The most challenging aspect in the instrument design is wide wavelength coverage from 280 nm to 1.1 μm to observe multiple chromospheric lines, which is to be realized with a lens unit including fluoride glasses. A high-speed camera for correlation tracking of granular motion is also implemented in one of the packages for an image stabilization system, which is essential to achieve high spatial resolution and high polarimetric accuracy.

Paper Details

Date Published: 6 October 2011
PDF: 8 pages
Proc. SPIE 8148, Solar Physics and Space Weather Instrumentation IV, 81480E (6 October 2011); doi: 10.1117/12.892677
Show Author Affiliations
Yukio Katsukawa, National Astronomical Observatory of Japan (Japan)
Yoshinori Suematsu, National Astronomical Observatory of Japan (Japan)
Toshifumi Shimizu, Japan Aerospace Exploration Agency (Japan)
Kiyoshi Ichimoto, Kwasan and Hida Observatories, Kyoto Univ. (Japan)
Norihide Takeyama, Genesia Corp. (Japan)


Published in SPIE Proceedings Vol. 8148:
Solar Physics and Space Weather Instrumentation IV
Silvano Fineschi; Judy Fennelly, Editor(s)

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