人工雾的激光退偏振特性  

Analysis of Light Scattering Characteristics of the Artificial Fog

作　　者：徐娟[1] 肖韶荣[1] 王振会[1] 刘瑞芳[1] 

机构地区：[1]南京信息工程大学电子信息工程系,南京210044

出　　处：《光通信技术》2005年第7期62-64,共3页Optical Communication Technology

基　　金：江苏省高校自然科学研究计划基金(02KJB510006)

摘　　要：分别测量了入射光偏振方向垂直散射面和平行散射面情况下,散射角θ分别为30°和90°时,不同人工雾的浓度的散射光强度。实验表明:θ=30°时,薄雾状态,散射光强随雾的浓度的增加而增大,当雾浓度达一定程度后,散射光随浓度的增加而减小;θ=90°时,随着雾的浓度的增加,散射光强逐渐增大,散射光强在浓度较大时呈现下降趋势。以Mie散射理论分析了偏振光在人工雾中的散射特性,并由散射角为90°时的退偏振度随雾的浓度的变化,讨论了雾粒子的结构及性质。The scattering light intensity is measured at scattering angle θ=30°and θ=90°with different fog concentration, on the different condition that incident light is vertical polarized or parallel polarized. The relations between fog concentration and scattering light intensity are shown. At scattering angle θ=30°, scattering light intensity increases with the increasing of the fog concentration in the thin fog and reduces in the thick fog. Atθ=90°, scattering light intensity increases with the increasing of the fog concentration, but it shows a downward tendency in the highly thick fog.Light scattering characteristics are analyzed based on Mie scattering theory.According to effects of fog concentration on the degree of depolarization atθ=90°,the structure and the nature of fogdrops are discussed.

关 键 词：大气光学 散射 人工雾 退偏振度 

分 类 号：TN241[电子电信—物理电子学]