Measurements of fine particle size using image processing of a laser diffraction image

The measurement of fine particle size is important in spray systems, minimum quantity lubrication, and weather observation. Introducing the recent progress of imaging techniques, the authors developed a portable measurement system. To overcome the large light intensity difference between the incident laser light and diffracted light and the limitation of the dynamic range of imaging devices, the event correlation was adopted. The growth of droplets in fog was experimentally measured. (C) 2016 The Japan Society of Applied Physics