The authors introduce the basic theory of dynamic light scattering(DLS). The basis components of experimental system are introduced,and the major things are the laser,PMT and digital correlation.

• 阐述了动态光散射法测量微小微粒粒径的原理；介绍了动态光散射实验系统的几个主要的组成部分；主要有激光器、光电倍增管、数字相关器.