Solar Physics

, Volume 249, Issue 2, pp 233–261

Polarization Calibration of the Solar Optical Telescope onboard Hinode

  • K. Ichimoto
  • B. Lites
  • D. Elmore
  • Y. Suematsu
  • S. Tsuneta
  • Y. Katsukawa
  • T. Shimizu
  • R. Shine
  • T. Tarbell
  • A. Title
  • J. Kiyohara
  • K. Shinoda
  • G. Card
  • A. Lecinski
  • K. Streander
  • M. Nakagiri
  • M. Miyashita
  • M. Noguchi
  • C. Hoffmann
  • T. Cruz
Article

DOI: 10.1007/s11207-008-9169-9

Cite this article as:
Ichimoto, K., Lites, B., Elmore, D. et al. Sol Phys (2008) 249: 233. doi:10.1007/s11207-008-9169-9

Abstract

The Solar Optical Telescope (SOT) onboard Hinode aims to obtain vector magnetic fields on the Sun through precise spectropolarimetry of solar spectral lines with a spatial resolution of 0.2 – 0.3 arcsec. A photometric accuracy of 10−3 is achieved and, after the polarization calibration, any artificial polarization from crosstalk among Stokes parameters is required to be suppressed below the level of the statistical noise over the SOT’s field of view. This goal was achieved by the highly optimized design of the SOT as a polarimeter, extensive analyses and testing of optical elements, and an end-to-end calibration test of the entire system. In this paper we review both the approach adopted to realize the high-precision polarimeter of the SOT and its final polarization characteristics.

Keywords

PolarimeterStokes vectorSpace telescopeMagnetic fieldOptical telescopeSun

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • K. Ichimoto
    • 1
  • B. Lites
    • 2
  • D. Elmore
    • 2
  • Y. Suematsu
    • 1
  • S. Tsuneta
    • 1
  • Y. Katsukawa
    • 1
  • T. Shimizu
    • 4
  • R. Shine
    • 3
  • T. Tarbell
    • 3
  • A. Title
    • 3
  • J. Kiyohara
    • 5
  • K. Shinoda
    • 1
  • G. Card
    • 2
  • A. Lecinski
    • 2
  • K. Streander
    • 2
  • M. Nakagiri
    • 1
  • M. Miyashita
    • 1
  • M. Noguchi
    • 1
  • C. Hoffmann
    • 3
  • T. Cruz
    • 3
  1. 1.National Astronomical Observatory of JapanMitakaJapan
  2. 2.High Altitude ObservatoryNational Center for Atmospheric ResearchBoulderUSA
  3. 3.Lockheed Martin Advanced Technology CenterPalo AltoUSA
  4. 4.Japan Aerospace Exploration AgencyInstitute of Space and Astronautical ScienceSagamiharaJapan
  5. 5.Kwasan ObservatoryKyoto UniversityKyotoJapan