基于Mie理论的水雾粒子多光谱消光特性研究

基于Mie散射理论,建立了水雾粒子的消光模型,计算了水雾粒子的多光谱消光特性,分析了水雾的消光特性与水雾粒子粒径之间的关系。结果表明:不同波长条件下,最佳水雾消光性能所对应的水雾粒子粒径也不同;半径在0.22~0.53μm的水雾粒子对可见光的消光性能最好;半径在0.81~8.15μm的水雾粒子对中、远红外辐射的消光性能最好;对于1.06μm和10.6μm两个军用激光常见波长,水雾粒子半径应分别为0.89μm和8.15μm,才能达最佳消光效果。

Study on extinction properties of water fog particles in multi-spectrum based on Mie theory

Based on Mie theory,the extinction model of the water fog particles was set up. The extinction properties of water fog particles in multi-spectrum were calculated. The relationship between the extinction properties and the size of the water fog particles was analyzed. The results show that the corresponding size of the water fog particles at the maximum extinction efficiency is different at the different radiation wave length. When the radiuses of the water fog particles are in the range of 0.22～0.53μm,the extinction properties at the visible light reach the maximum. When it comes to the infrared radiation,the radiuses is in the range of 0.81～8.15μm. That as far as the wave lengths of radiation of 1.06μm and 10.6μm be concerned which are widely used in military field,the radius of the particle is 0.89μm and 8.15μm respectively.