根据雾滴的尺寸分布模型及辐射雾和平流雾含水量与能见度的经验关系,运用Mie理论及其Van de Hulst近似计算了衰减效率因子, 并结合Deirmendjian对其进行修正,详细分析了激光在雾中的衰减计算公式。 在考虑前向散射时进一步结合Adarsh Deepak和O.H.Vanghan提出的前向修正系数, 得出前向散射修正后的衰减公式, 分析了雾的前向散射对激光传输的影响。 最后将修正后的衰减与常用经验衰减模式相比较, 表明前向散射修正后雾对激光的衰减更加接近实际工程应用。

Based on the particle size spectral distribution function of fogdrop and the empirical relation of water content and visibility for radiation fog and advection fog, attenuation efficiency gene is computed using Mie theory and Van de Hulst approximating, which is also rectified by Deirmendjian, it analyzes particularly formula of fog attenuation.When considering the forward scattering, combining with forward scattering rectified coefficient put forward by Adarsh Deepakand O.H.Vanghan, gets a attenuation formula that have been rectified,and analyzes the effect of fog’s forward scattering for laser transmission is. Finally, comparing the modified attenuation with the common empirical attenuation model, indicate fog attenuation by forward scattering rectified is more close to empirical attenuation model.