Device for optical linear polarization measurements with a single exposure

Claudio Pernechele; Enrico Giro; D. Fantinel

doi:10.1117/12.466129

14 February 2003 Device for optical linear polarization measurements with a single exposure

Claudio Pernechele, Enrico Giro, D. Fantinel

Proceedings Volume 4843, Polarimetry in Astronomy; (2003) https://doi.org/10.1117/12.466129
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

The use of CCDs as focal plane detectors has changed the design concept for the polarimetric mode in the visible and, actually, also in the near infrared spectral ranges. Providing astronomical instrumentation with polarization sensitive crystal in appropriate configuration (Wollaston, Rochon, Glann-Thomson, and so on), together with half- or quarter- waveplate retarder, it is possible to determine the linear and/or circular Stokes parameters. The polarization analyser placed at the Asiago Faint Object Spectrographic Camera (AFOSC), allows simultaneous measurements of the two linear Stokes parameters usually named Q and U without any λ/2 retarder plate. Similar devices may be designed to be placed at every instrument with an accessible pupil. The paper reports details of the instrument concept and the results of observations of polarized and unpolarized standard stars, both in broad-band and spectro-polarimetry observing modes.

Citation Download Citation

Claudio Pernechele, Enrico Giro, and D. Fantinel "Device for optical linear polarization measurements with a single exposure", Proc. SPIE 4843, Polarimetry in Astronomy, (14 February 2003); https://doi.org/10.1117/12.466129

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