DIPOL-2: a double image high precision polarimeter

V. Piirola; A. Berdyugin; Svetlana Berdyugina

doi:10.1117/12.2055923

28 July 2014 DIPOL-2: a double image high precision polarimeter

V. Piirola, A. Berdyugin, Svetlana Berdyugina

Proceedings Volume 9147, Ground-based and Airborne Instrumentation for Astronomy V; 91478I (2014) https://doi.org/10.1117/12.2055923
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

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.

Citation Download Citation

V. Piirola, A. Berdyugin, and 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); https://doi.org/10.1117/12.2055923

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