Abstract
We investigate skylight polarization patterns in an urban region using our developed full-Stokes imaging polarimeter. A detailed description of our imaging polarimeter and its calibration are given, then, we measure skylight polarization patterns at wavelength and at solar elevation between and in the city of Hefei, China. We show that in an urban region with high-loading aerosols: (1) the measured degree of linear polarization reaches the maximum near sunset, and large areas of unpolarized sky exist in the forward sunlight direction close to the Sun; (2) the position of neural points shifts from the local meridian plane and, if compared with a clear sky, alters the symmetrical characteristics of celestial polarization pattern; and (3) the observed circular polarization component is negligible.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
Le Guan, Shiqi Li, Liyuan Zhai, Sheng Liu, Hui Liu, Wei Lin, Yan Cui, Jinkui Chu, and Huikai Xie
Appl. Opt. 57(21) 6243-6251 (2018)
András Barta, Alexandra Farkas, Dénes Száz, Ádám Egri, Pál Barta, József Kovács, Balázs Csák, István Jankovics, Gyula Szabó, and Gábor Horváth
Appl. Opt. 53(23) 5193-5204 (2014)
Eyk Boesche, Piet Stammes, Thomas Ruhtz, Réne Preusker, and Juergen Fischer
Appl. Opt. 45(34) 8790-8805 (2006)