Near-infrared HeI 1083nm stokes polarimeter based on liquid crystal variable retarders

Zhiyong Zhang, Yuanyong Deng, Dongguang Wang, Sun Yingzi, Wenda Cao

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

The spectral line of HeI 1083nm is important and potential to measure the magnetic field of the solar upper chromosphere. In this paper, we present a newly developed Stokes polarimeter for measuring the polarized signals at this wavelength. In this device, two Liquid Crystal Variable Retarders (LCVRs) were employed as electro-optical modulators and a Wollaston prism as analyzer and polarized beam splitter. Compared to the commonly used linear-polarized analyzer, the Wollaston prism analyzer has main advantage to minimize the seeing-induced contamination of earth's atmosphere, as it produces simultaneous images by the two perpendicular polarization states. A novel optical design which focuses the two beams on different detector areas is described. And the accurate calibration methods are introduced too.

Original languageEnglish (US)
Article number59011F
Pages (from-to)1-12
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5901
DOIs
StatePublished - Dec 1 2005
EventSolar Physics and Space Weather Instrumentation - San Diego. CA, United States
Duration: Jul 31 2005Aug 2 2005

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Keywords

  • LCVR
  • Polarimeter
  • Wollaston prism

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