Snik, FransBos, Steven P.Brackenhoff, Stefanie A.Doelman, David S.Por, Emiel H.Bettonvil, FelixRodenhuis, MichielVorobiev, DmitryEshelman, Laura M.Shaw, Joseph A.2022-02-022022-02-022020-07Snik, Frans, Steven P. Bos, Stefanie A. Brackenhoff, David S. Doelman, Emiel H. Por, Felix Bettonvil, Michiel Rodenhuis, Dmitry Vorobiev, Laura M. Eshelman, and Joseph A. Shaw. “Detection of Polarization Neutral Points in Observations of the Combined Corona and Sky During the 21 August 2017 Total Solar Eclipse.” Applied Optics 59, no. 21 (July 2, 2020): F71-F77. doi:10.1364/ao.391814.1559-128Xhttps://scholarworks.montana.edu/handle/1/16619We report the results of polarimetric observations of the total solar eclipse of 21 August 2017 from Rexburg, Idaho (USA). We use three synchronized DSLR cameras with polarization filters oriented at 0°, 60°, and 120° to provide high-dynamic-range RGB polarization images of the corona and surrounding sky. We measure tangential coronal polarization and vertical sky polarization, both as expected. These observations provide detailed detections of polarization neutral points above and below the eclipsed Sun where the coronal polarization is canceled by the sky polarization. We name these special polarization neutral points after Minnaert and Van de Hulst.© 2017 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.Article