基于马赫-曾德尔干涉法测量物体的线膨胀系数  

Measuring the Linear Expansion Coefficient of an Object Based on the Mach-Zehnder Interference Method

作　　者：黄珍献 黄书彬 靳珍珍 张田苇 姚金涛 丁晓宇 Huang Zhenxian;Huang Shubin;Jin Zhenzhen;Zhang Tianwei;Yao Jintao;Ding Xiaoyu(Department of Physics,School of Science,Tianjin University of Commerce,Tianjin 300134)

机构地区：[1]天津商业大学理学院物理系

出　　处：《物理通报》2018年第9期84-86,共3页Physics Bulletin

基　　金：2017年天津市大学生创新创业训练计划项目(国家级);项目编号:201710069035

摘　　要：基于马赫-曾德尔干涉原理,来测量物体线膨胀系数.将光路中的一个平面镜与被测物体固定接触,物体受热后产生的线膨胀量带动平面镜移动,引起光程差的变化.通过观察条纹的变化,从而实现物体线膨胀系数的测量.该方法光路简单,易操作,与迈克尔孙干涉测量法相比条纹数变化少,更易于学生的观察.This paper is based on the Mach-Zehnder interference to measure the coefficient of linear expansion of objects.A plane mirror of the optical path is fixed on the measured object.The optical path difference will be changed when the linear expansion which is caused by the heat of the object will drive the plane mirror to move.According to the change of the interference fringe,the measurement of the coefficient of linear expansion of the object can be realized.The optical path of this method is simple and easy to operate.Compared with Michelson interference,the number of the interference fringe is changed more less and easier for students to observe.

关 键 词：马赫-曾德尔干涉 线膨胀量 线膨胀系数 迈克尔孙干涉 

分 类 号：O436.1[机械工程—光学工程]