Development of simultaneous imaging polarimeter

Details Development of simultaneous imaging polarimeter Development of simultaneous imaging polarimeter

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6269e.105f&link_type=abstract

Ground-based and Airborne Instrumentation for Astronomy. Edited by McLean, Ian S.; Iye, Masanori. Proceedings of the SPIE, Volu

Astronomy and Astrophysics

Astronomy

Scientific paper

Accurate polarization measurements are obtained by modern imaging polarimeter and spectro-polarimeter that often employ a rotating λ/2 retarder plate and a Wollaston prism. In this configuration, the linear Stokes parameter U is measured after the measurements of the Q parameter by rotating the retarder plate, or vice versa. However, the resultant accuracy is not satisfactory, because of the tracking error of the telescope and changes in atmospheric conditions. In order to enhance the polarimetric accuracy and observational efficiency, we are constructing an imaging polarimeter which can measure the two linear Stokes parameters Q and U, simultaneously. The polarimeter features an unpolarized beam splitter and two Wollaston prisms, allowing the simultaneous acquisition of the four polarized images without moving parts.

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