24 September 2012 Polarimeter with a high-speed rotating waveplate for the solar observation
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Abstract
We developed a polarimeter for the ground-based solar observation using a high-speed rotating waveplate (typically 12.5–25 revolutions s−1) and a high-speed camera (typically 200–400 frames s−1) with commercially available devices. Fast polarization modulation is required for the ground-based solar polarimetry to avoid producing seeing-induced false polarization signals. Modulation with a high-speed rotating waveplate realizes not only fast full-Stokes modulation but also wide coverage of the wavelength range, and therefore, a polarimeter with a highspeed rotating waveplate is most suitable for the simultaneous polarimetry observations at multi-wavelengths with a spectrograph. A comprehensive description of the instrument and some results of the solar spectropolarimetry with this polarimeter are given in this paper.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yoichiro Hanaoka, "Polarimeter with a high-speed rotating waveplate for the solar observation", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 844670 (24 September 2012); doi: 10.1117/12.925304; https://doi.org/10.1117/12.925304
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