Combination of two Fabry-Pérot etalons and a grating spectrograph for imaging polarimetry of the Sun

Lucia Kleint; Alex Feller; Michele Bianda

doi:10.1117/12.787923

9 July 2008 Combination of two Fabry-Perot etalons and a grating spectrograph for imaging polarimetry of the Sun

Lucia Kleint, Alex Feller, Michele Bianda

Proceedings Volume 7014, Ground-based and Airborne Instrumentation for Astronomy II; 701414 (2008) https://doi.org/10.1117/12.787923
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

Imaging spectroscopy of the Sun is a challenging task usually performed with Fabry-Perot etalons. The common setup is a combination of two or three etalons in series and a narrow-band prefilter. The requirement of one, usually expensive prefilter for every desired wavelength limits the number of spectral regions that can be observed. We present a novel instrument combination consisting of two Fabry-Perot etalons and a grating spectrograph, which allows for observations in any wavelength between 390 nm and 660 nm without the need for narrow-band prefilters. Furthermore, two or more adjacent monochromatic images are projected on the detector, each image corresponding to a different spectral transmission peak of the Fabry-Perot filtergraph. Together with our Zurich Imaging Polarimeter (ZIMPOL) the system is installed at the telescope of the Istituto Ricerche Solari Locarno (IRSOL) where it will be used for two-dimensional spectropolarimetry. We present a description of the instrument and test observations.

Citation Download Citation

Lucia Kleint, Alex Feller, and Michele Bianda "Combination of two Fabry-Perot etalons and a grating spectrograph for imaging polarimetry of the Sun", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 701414 (9 July 2008); https://doi.org/10.1117/12.787923

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