152 citations · 2.7k across the 105 of their papers we have counts for
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Polarization properties of real aluminum mirrors; I. Influence of the aluminum oxide layer
G. van Harten, F. Snik, C. U. Keller
In polarimetry it is important to characterize the polarization properties of the instrument itself to disentangle real astrophysical signals from instrumental effects. This articl…
Spectral modulation for full linear polarimetry
Frans Snik, Theodora Karalidi, Christoph U. Keller
Linear (spectro) polarimetry is usually performed using separate photon flux measurements after spatial or temporal polarization modulation. Such classical polarimeters are limited…
Astronomical Applications for "Radial Polarimetry"
Frans Snik
Many objects on the sky exhibit a centrosymmetric polarization pattern, particularly in cases involving single scattering around a central source. Utilizing a novel liquid crystal…
The Prototype of the Small Synoptic Second Solar Spectrum Telescope (S5T)
Frans Snik, Radek Melich, Christoph Keller
We present the design and the prototype of the Small Synoptic Second Solar Spectrum Telescope (S5T), which can autonomously measure scattering polarization signals on a daily basis…