Innovative static spectropolarimeter concept for wide spectral ranges: tolerancing study

Martin Pertenais; Coralie Neiner; Laurent Parès; Pascal Petit

doi:10.1117/12.2186294

1 September 2015 Innovative static spectropolarimeter concept for wide spectral ranges: tolerancing study

Martin Pertenais, Coralie Neiner, Laurent Parès, Pascal Petit

Proceedings Volume 9613, Polarization Science and Remote Sensing VII; 96130D (2015) https://doi.org/10.1117/12.2186294
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

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.

Citation Download Citation

Martin Pertenais, Coralie Neiner, Laurent Parès, and Pascal Petit "Innovative static spectropolarimeter concept for wide spectral ranges: tolerancing study", Proc. SPIE 9613, Polarization Science and Remote Sensing VII, 96130D (1 September 2015); https://doi.org/10.1117/12.2186294

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