This conference series has been continually providing forums for promoting the interchange of new ideas on the development of advanced theories and model, as well as the latest experimental developments. Since nearly three decades this series, whose topics are continuously evolving, provides a source of state-of-the-art in light and shaped beam interactions with particle and particle systems.

The present edition follows the former Optical Particle Sizing (OPS) and Optical Particle Characterization (OPC) conferences held in Rouen 1987Tempe, AZ, 1990; Yokohama, 1993; Nürnberg, 1995; Minneapolis, MN,1998; Brighton, 2001Kyoto, 2004; Graz, 2007 as well as the reformulated LIP conference, held in Rouen, in 2012Marseille, 2014 and Xi'an 西安市, 2016.

Over the years, selected papers from this conference series were published in books and special issues of highly ranked journals (Applied Optics, Particle & Particle Systems Characterization, Journal of Quantitative Spectroscopy & Radiative Transfer).