掠入射法测量液体折射率实验现象分析  

An Experimental Analysis on Measurement of Liquid Index by a Method of Glancing Incidence

作　　者：张培杰[1] 陈磊[2] 张小娣[2] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]咸阳师范学院,陕西咸阳712000

出　　处：《大学物理实验》2012年第6期52-53,62,共3页Physical Experiment of College

基　　金：陕西省教育厅科研基金项目(2010JK892)

摘　　要：掠入射法是基于全反射定律,采用几何光学原理来测量液体折射率的一种方法。文中对掠入射法测量透明液体折射率实验中出现的干涉条纹进行了定量分析,认为在分光计望远镜中观察到的干涉条纹是光线进入辅助透镜和直角棱镜间被测薄液膜干涉形成的,通过定义干涉条纹疏密度,对于薄膜引起的光程差与干涉明纹(或暗纹)间距两者间的关系进行讨论,其讨论的结果与实验结果一致。The method of the glancing incidence is one kind of the measurement method to liquid index,based on the total reflection law.In this paper,the interference fringe is quantitative analysed,interference phenomenon is producted thought the liquid film between auxiliary lens and rectangular lens,and the chance of the space between interference bright fringe is discussed by the defined the degree of density of the interference fringe.The discussed result is agreed with the experimental result.

关 键 词：条纹疏密度 掠入射 液体折射率 

分 类 号：O435.1[机械工程—光学工程]