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.