多重反射激光光杠杆测量金属线胀系数  

Study on measuring linear expansion coefficient of metals with multi-reflection laser light lever

作　　者：骆敏[1] 骆泽如 陈蕾[1] 余观夏[1] 林杨帆 LUO Min;LUO Ze-ru;CHEN Lei;YU Guan-xia;LIN Yang-fan(Physics Teaching Laboratory,Nanjing Forestry University,Nanjing 210037,China;Nanjing No.1 Middle School,Nanjing 210001,China)

机构地区：[1]南京林业大学物理教学实验中心,江苏南京210037 [2]南京市第一中学,江苏南京210001

出　　处：《物理实验》2018年第7期14-16,22,共4页Physics Experimentation

基　　金：南京林业大学2016年高等教育研究课题(No.163101152);南京林业大学2017年教学质量提升工程项目(No.163101817);南京林业大学中外合作办学高水平示范性建设项目(No.164101006);大学生创新训练计划项目(No.2017NFUSPITP274;2016NFUSPITP162)

摘　　要：提出了多重反射光杠杆测量微位移的方法.该方法利用两个相同的平面镜增加光照传播过程中的反射次数,以提高放大倍数,并用螺旋测微计来确定放大倍数.相对于传统光杠杆,该测量方法光路调节简单,待测物理量少,读数更加快捷,直观性强,灵敏度高.A method of measuring micro-displacement with multiple reflection light lever was presented.Two same mirrors were used for increasing the number of reflections,and then the magnification was increased.The magnification was determined using the spiral micrometer.Comparing with the traditional optical lever,the method was not only of simpler light path adjustment and of less measured physical quantity,but also more intuitive,fast reading,and high sensitivity.

关 键 词：线胀系数 微位移 光杠杆 多重反射 激光 

分 类 号：O551.3[理学—热学与物质分子运动论]