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Proceedings Paper • Open Access

Liquid-crystal tunable Lyot filter for solar corona spectro-polarimetry: tests and calibrations
Author(s): G. Capobianco; L. Capobianco; G. Massone

Paper Abstract

This presentation reports the laboratory tests and calibrations of a novel electro-optically tunable Lyot filter for imaging spectro - polarimetry. The filter’s high-resolution bandpass (λ/▵λ = 3.5 E+3) is centred on filter Fe XIV, 530 3 nm (green line) solar corona emission line Performances of this Liquid Crystal Tunable filter and Polarimeter Results F-P Etalon 530.3 line. Tunable-(LCTP) are also compared with the performances of a classical very high-resolution (λ/▵λ = 2.5 E+4) Fabry-Perot (FP) etalon. The results of the tests show even if the F-P etalon has a higher instrumental resolution, the LCTP has the same effective spectral resolution thanks to its electro-optical fine-tuning capability in wavelength. In addition, the LCTP has the advantage over the F-P etalon of having no mechanically moving parts, polarimetric capability and to do imaging. This project is part of the ESA Startiger activities and part of the preliminary studies for the ASPIICS coronagraph for the PROBA-3 formation flying mission.

Paper Details

Date Published: 5 September 2019
PDF: 2 pages
Proc. SPIE 10565, International Conference on Space Optics — ICSO 2010, 105655K (5 September 2019); doi: 10.1117/12.2552757
Show Author Affiliations
G. Capobianco, Istituto Nazionale di Astrofisica (Italy)
L. Capobianco, Univ. degli Studi di Siena (Italy)
G. Massone, Istituto Nazionale di Astrofisica (Italy)

Published in SPIE Proceedings Vol. 10565:
International Conference on Space Optics — ICSO 2010
Errico Armandillo; Bruno Cugny; Nikos Karafolas, Editor(s)

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