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Proceedings Paper

DIPOL-2: a double image high precision polarimeter
Author(s): V. Piirola; A. Berdyugin; Svetlana Berdyugina
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Paper 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.

Paper Details

Date Published: 28 July 2014
PDF: 9 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91478I (28 July 2014); doi: 10.1117/12.2055923
Show Author Affiliations
V. Piirola, Univ. of Turku (Finland)
A. Berdyugin, Univ. of Turku (Finland)
Svetlana Berdyugina, Kiepenheuer-Institut für Sonnenphysik (Germany)


Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)

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