The paper was published by UW group on Atmospheric Measurement Techniques.
Authors: Nowak, Jakub L., Moein Mohammadi, and Szymon P. Malinowski.
Title: Applicability of the VisiSize D30 shadowgraph system for cloud microphysical measurements
Link to the paper: https://amt.copernicus.org/articles/14/2615/2021/