28 July 2014 DIPOL-2: a double image high precision polarimeter
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Abstract
We have built a new broad-band polarimeter (DIPOL-2), capable of measuring polarization with the precision at the 10-5 level. Two dichroic beam-splitters are used to split light into three passbands (BVR), simultaneously recorded with three CCDs. A rotatable superachromatic λ/2 (or λ/4) plate is used as the polarization modulator and a plane parallel calcite plate as the polarization analyzer. Simple yet effective design with small number of optical elements and moving mechanical parts makes DIPOL-2 a highly versatile and reliable instrument with negligible instrumental polarization, very well suitable for observations with remotely controlled telescopes. Current and planned observing programs are briefly described.
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V. Piirola, V. Piirola, A. Berdyugin, A. Berdyugin, Svetlana Berdyugina, Svetlana Berdyugina, } "DIPOL-2: a double image high precision polarimeter", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91478I (28 July 2014); doi: 10.1117/12.2055923; https://doi.org/10.1117/12.2055923
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