Polarization calibration of the solar optical telescope onboard Hinode

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.

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An edited version of this paper was published by Springer. Copyright Springer 2008 Science+Business Media B.V.
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Author Ichimoto, K.
Lites, Bruce W.
Elmore, David F.
Suematsu, Y.
Tsuneta, S.
Katsukawa, Y.
Shimizu, T.
Shine, R.
Tarbell, T.
Title, A.
Kiyohara, J.
Shinoda, K.
Card, Gregory L.
Lecinski, Alice R.
Streander, Kim V.
Nakagiri, M.
Miyashita, M.
Noguchi, M.
Hoffmann, C.
Cruz, T.
Publisher UCAR/NCAR - Library
Publication Date 2008-06-01T00:00:00
Digital Object Identifier (DOI) Not Assigned
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Topic Category geoscientificInformation
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Metadata Date 2025-07-17T15:57:42.114466
Metadata Record Identifier edu.ucar.opensky::articles:6265
Metadata Language eng; USA
Suggested Citation Ichimoto, K., Lites, Bruce W., Elmore, David F., Suematsu, Y., Tsuneta, S., Katsukawa, Y., Shimizu, T., Shine, R., Tarbell, T., Title, A., Kiyohara, J., Shinoda, K., Card, Gregory L., Lecinski, Alice R., Streander, Kim V., Nakagiri, M., Miyashita, M., Noguchi, M., Hoffmann, C., Cruz, T.. (2008). Polarization calibration of the solar optical telescope onboard Hinode. UCAR/NCAR - Library. https://n2t.org/ark:/85065/d7wq03z7. Accessed 30 August 2025.

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