Development of simultaneous imaging polarimeter

Kenta Fujita; Maiko Nishida; Yoichi Itoh; Tadashi Mukai

doi:10.1117/12.670232

29 June 2006 Development of simultaneous imaging polarimeter

Kenta Fujita, Maiko Nishida, Yoichi Itoh, Tadashi Mukai

Proceedings Volume 6269, Ground-based and Airborne Instrumentation for Astronomy; 62693D (2006) https://doi.org/10.1117/12.670232
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

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.

Citation Download Citation

Kenta Fujita, Maiko Nishida, Yoichi Itoh, and Tadashi Mukai "Development of simultaneous imaging polarimeter", Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62693D (29 June 2006); https://doi.org/10.1117/12.670232

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