基于散射模型的霓虹现象研究  

Study of the rainbow and secondary rainbow based on the scattering model

作　　者：韩凯[1] 许晓军[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410072

出　　处：《激光与红外》2016年第3期334-339,共6页Laser & Infrared

摘　　要：霓和虹是天空中常见的大气光学现象,采用几何光学理论能够较准确地解释其成因。然而,几何光学理论的物理模型相对简单,不能说明雨滴尺度等因素对霓、虹形成的影响。本文采用散射理论研究了不同尺度水汽粒子的散射相函数以及雨滴粒子集群的角向色散特性,从散射的角度解释了霓和虹的成因,最后对散射理论和几何光学理论做了对比。研究结果为大气光学现象的研究提供了新的思路。Rainbow and secondary rainbow are common atmospheric optical phenomenons in the sky,which have been properly explained by geometrical optics theory. Nevertheless,the physical model of geometrical optics theory is relatively simple,which cannot illuminate the influence of the H2 O particle size. Based on scattering theory the scattering phase functions of various particles are researched and the angular dispersion of the H2 O particle group is demonstrated in this paper. The rainbow and secondary rainbow are explained by scattering theory. Moreover,the scattering theory is compared with geometrical optics theory. The results provide novel viewpoints for the research of atmospheric optical phenomenon.

关 键 词：大气光学现象 虹和霓 米散射 相函数 

分 类 号：Q436[生物学—生理学]