The dependence of speckle contrast on velocity: a numerical study Kevin van As, Bram A. Simons, Chris R. Kleijn, Sasa Kenjeres and Nandini Bhattacharya J. Eur. Opt. Society-Rapid Publ., 18 2 (2022) 11 Published online: 25 November 2022 DOI: 10.1051/jeos/2022010