在对激光引信视场进行体积元分割的基础上，基于Mie散射理论建立了一种近似计算引信云雾散射回波的数学模型，并利用该模型计算了均匀云雾粒子与服从一定谱分布云雾粒子的散射回波,分析了入射激光波长、粒子浓度及谱分布参数对散射回波强度的影响。研究结果表明：对均匀云雾粒子，引信的散射回波随粒径增大呈振荡增强趋势；粒子浓度相同时，尺度谱偏大的云雾粒子群的散射回波明显高于尺度谱偏小的云雾粒子群；对折射率虚部差别明显的不同波长激光，其散射回波强度差别显著，云雾对虚部偏小激光的散射光强明显高于虚部偏大的激光。为激光引信抗云雾干扰提供了重要理论依据。

By volume element dividing of the laser fuse field,a mathematical model for approximate calculation of the fuse cloud-and-fog scattering echo was established based on Mie scattering theory.The scattering echo of uniform cloud-and-fog particles as well as cloud-and-fog particles complying with certain spectral distribution was calculated out with this model.The influence of incident laser wavelength,particle concentration and spectral distribution parameters on the intensity of scattering echo was analyzed.The research results show that:1) For uniform cloud-and-fog particles,the oscillation of fuse scattering echo enhances with the increase of particle size; 2) For the same particle concentration,scattering echo of the cloud-and-fog particle swarm with large radius is significantly higher than that of the cloud-and-fog particle swarm with small radius;and 3) For laser of different wavelength and with a significant difference in the imaginary part of refractive index,the intensity of their scattering echo differs significantly,i.e.,the cloud-and-fog scattering light intensity of laser with a smaller imaginary part is significantly higher than that of laser with a larger imaginary part.The study may provide a theoretical basis for laser fuse anti-cloud-and-fog interference.