雾对光偏振态影响的实验研究Experim ental Study on the Laser .PDF

29 6 Vo.l 29 N o. 6 2006 12 Journal ofN anjing Institute ofM eteorology Dec. 2006 : 1000-2022( 2006) 06-0 15-04 刘瑞芳, 王振会, 肖韶荣, 徐娟 ( , 210044) : 测量了不同人工雾浓度下垂直偏振入射光的透射光强利用实验数据, 分析了垂直平行 向上透射光强的变化趋势, 得出平行偏振分量透射光强大致呈指数下降的趋势, 垂直偏振分量透射 光强先略微上升而后下降由退偏振度随雾浓度的变化讨论了退偏产生的原因, 指出雾浓度较低 时, 雾滴可近似视为球形基于光的偏振特性, 从理论上分析并计算得到光在雾中传输时透射散 射光强实验结果对研究光在雾中传输及分析大气中雾对透射光偏振态的影响有 一定的参考价 值 : 大气光学; 人工雾; M ie散射; 偏振态 : P407 : A ExperimentalStudy on theLaserPolarization ofFog LIU Rui-fang, WANG Zhen-hu,i XIAO Shao-rong, XU Juan ( Departm ent of Electronic Engineering, NU IST, Nanjing 210044, China) Abstract:T ransm ission intensity of vertical polarized incident light under different artificial fog concentra- tionsw as expermi entally measured, and based on the expermi ental data, changes in relative vertical and parallel transm ission intensityw ere analyzed. Results show that the parallel transm ission intensity approx-i mately show s an exponentially decline distribution wh ile the vertical one d isp lays a rising-then-declining trend. Using the degree of depolarization, cause of depolarization w as d iscussed, and the droplet can be view ed as a sphericity in the lighter fog. Based on the characteristic of polarized light, transm ission intens-i ty and scattering intensity w ere calculated. The expermi ent is valuable in study of the light transm ission in fog and in analyzing the effect of fog on laser rad iation polarization in the atmosphere. ey words: optics of the atmosphere; artificial fog; M ie scattering; polarization , 0