运用弥散粒子群Mie光散射理论建立了粒子测试的光学计算模型及多变量单纯型优化方法。研制出以线阵CCD光电探测阵列为接收器的激光粒度仪样机,适于0.31～168μm固体粉末或混浊液中悬浮粒子的粒度分布测量。与其它方法的测量结果对比分析,证明了设计原则的正确和样机的研制成功。 The optical calculation model of particle test and the multivariate simplex optimization method were established by using the Mie scattering theory of dispersive particle swarm. The prototype of laser particle sizer with linear CCD photoelectric detector array as receiver was developed, which is suitable for the particle size distribution measurement of suspended particles in 0.31 ~ 168μm solid powder or turbid liquid. Compared with the measurement results of other methods, it proves that the design principle is correct and the prototype is successfully developed.