双棱镜干涉法准确测量钠光波长  

Accurate Measurement of Sodium Light Wavelength by Double Prism Interference Method

作　　者：沈雨欣 翁存程 蒋丽钦 SHEN Yuxin;WENG Cuncheng;JIANG Liqin(College of Physics and Energy,Fujian Normal University,Fuzhou 350117,China)

机构地区：[1]福建师范大学物理与能源学院,福建福州350117

出　　处：《大学物理实验》2023年第3期40-43,共4页Physical Experiment of College

基　　金：福建省自然科学基金项目(2023J01132090);福建师范大学教学改革研究项目(I202201106)。

摘　　要：影响双棱镜干涉实验准确测量钠光波长的主要因素:虚光源位置的确定、虚光源间距的测量、干涉条纹间距的测量。研究表明通过透镜成像法可以准确确定虚光源的位置。另外,利用透镜成像法测量虚光源放大像的间距以及对应的物距和像距可准确测量虚光源的间距。最后,通过测量距离虚光源较远处且尽量多的干涉条纹的距离再平均可以准确测量干涉条纹的间距。采用这些测量方法可以准确得到钠光的波长。It points out the main factors that affect the accurate measurement of sodium light wavelength in the double prism interference experiment:determination of the position of virtual light source,measurement of virtual light source spacing,and measurement of interference fringe spacing.The research shows that the position of virtual light source can be accurately determined by the lens imaging method.In addition,the virtual light source spacing can be accurately measured by using the lens imaging method to measure the spacing of the magnified image of the virtual light source and the corresponding object and image distances.Finally,the interference fringe spacing can be accurately determined by measuring and averaging the distances of as many interference fringes as possible farther away from the virtual light source.Using these measurement methods,the sodium light wavelength can be accurately obtained.

关 键 词：双棱镜 干涉 波长 测量 

分 类 号：O435.1[机械工程—光学工程]