利用单光束扫描法研究了球状电介质悬浮液的非线性光学性质，对直径为0.059 μｍ，浓度为2.5％的聚苯乙烯悬浮液的非线性光学系数n2进行了测量，给出ｎ2值为4.3×10-9 cm2/W.从实验中得出这种悬浮液中n2引起的折射率变化远大于热效应引起的折射率变化.

Optical nonliearity of the liquid suspension of dielectric spheres has been studied with a single beam technique. Nonlinear refractive index n2 of polystyrene latex suspension with 0.059 μm-dimeter and concentration of 2.5% has been measured to be 4.3 ×10-9 cm2/W. The contribution of thermal effect has been proved experimentally to be negligible as compared with that of electrostrictive effect.