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The adjustment method of imaging Stokes polarimeter

based on liquid crystal variable retarders

Władysław A. Woźniak*, Piotr Kurzynowski, Sławomir Drobczyński

Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

*Corresponding author: wladyslaw.wozniak@pwr.wroc.pl

The description of adjustment of imaging Stokes polarimeter constructed and tested in our laboratory is hereby presented. Our polarimeter’s operation is based on six fast intensity distributions measurements realized in six different configurations of linear and circular analyzers. Using liquid crystal variable retarders (LCVRs) makes this construction compact and mechanically simple. However, new problems arise with proper azimuthal alignment as well as with proper LCVRs’ voltage adjustment. Three basic steps of the adjustment procedure adapted to specific construction of our polarimeter were described in detail. Some remarks concerning the critical parameters of used CCD camera’s parameters are also presented as well as experimental verifications of the setup’s accuracy acquired due to the proper adjustment process.

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