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Proceedings Paper

Innovative static spectropolarimeter concept for wide spectral ranges: tolerancing study
Author(s): Martin Pertenais; Coralie Neiner; Laurent Parès; Pascal Petit
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Paper Abstract

Developing an efficient and robust polarimeter for wide spectral ranges and space applications is a main issue in many projects. As part of the UVMag consortium created to develop UV facilities in space (e.g. the Arago mission proposed to ESA), we are studying an innovative concept of polarimeter that is robust, simple, and efficient on a wide spectral range. The idea, based on the article by Sparks et al. (2012), is to use polarization scramblers to create a spatial modulation of the polarization. Along the height of the wedges of the scramblers, the thickness of the birefringent material crossed by the light, and thus the retardance, vary continuously. This variation creates an intensity modulation of the light related to the entrance polarization state. Analyzing this modulation with a linear polarizer, and dispersing the light spectrally in the orthogonal spatial direction, enables the measurement of the full Stokes vector over the entire spectrum. This determination is performed with a single-shot measurement and without any moving parts in the system.

After a quick introduction to the concept and optical design, this article presents the tolerancing study of the optical bench using this spectropolarimeter. The impact of different error sources, such as, birefringence uncertainty or decenter of the wedges, is investigated.

Paper Details

Date Published: 1 September 2015
PDF: 6 pages
Proc. SPIE 9613, Polarization Science and Remote Sensing VII, 96130D (1 September 2015); doi: 10.1117/12.2186294
Show Author Affiliations
Martin Pertenais, LESIA, Observatoire de Paris, PSL Research Univ., CNRS, Sorbonne Univ. (France)
Univ. de Toulouse (France)
Coralie Neiner, LESIA, Observatoire de Paris, PSL Research Univ., CNRS, Sorbonne Univ. (France)
Laurent Parès, Univ. de Toulouse (France)
IRAP, CNRS (France)
Pascal Petit, Univ. de Toulouse (France)
IRAP, CNRS (France)

Published in SPIE Proceedings Vol. 9613:
Polarization Science and Remote Sensing VII
Joseph A. Shaw; Daniel A. LeMaster, Editor(s)

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