可调劈尖双点光源干涉实验  

Interference experiment of double point-sources using adjustable wedge

作　　者：陈杰 刘佳荣 詹东东 黄小军 王莹莹 许迎阳 王凤鹏[1] CHEN Jie;LIU Jiarong;ZHAN Dongdong;HUANG Xiaojun;WANG Yingying;XU Yingyang;WANG Fengpeng(School of Physics and Electronic Information,Gannan Normal University,Ganzhou 341000,China)

机构地区：[1]赣南师范大学物理与电子信息学院,江西赣州341000

出　　处：《物理实验》2024年第7期56-61,共6页Physics Experimentation

基　　金：江西省教育科学“十四五”规划课题(No.22YB179)。

摘　　要：设计了顶角可调的劈尖干涉装置,利用光纤耦合输出激光器作为光源,可以更全面地研究并展示2个点光源之间的干涉特点.光纤输出端可看成点光源,经过劈尖反射后形成2个虚点光源.在2个虚点光源连线垂直方向上形成与杨氏双孔干涉现象类拟的条形干涉条纹,在2个虚点光源连线延长线方向上形成与迈克耳孙干涉现象类似的环形干涉条纹.实验结果表明:利用可调劈尖,在劈尖厚度达到mm量级的情况下,仍能观测到干涉条纹,因而可用于mm级物体形变量的测量.A wedge interference device with the adjustable angle was designed,the interference characteristics between double point-sources could be displayed with a fiber-coupled output laser as the light source.The fiber output could be regarded as a point-source,which formed virtual double point-sources after wedge tip reflection.The line-shaped interference fringe similar to Young’s interference could be observed in the direction perpendicular to the connecting line of the virtual double point-sources.A ring-shaped interference fringe similar to the Michelson interference was formed in the extension line direction of the connecting line of the virtual double point-sources.The experimental research showed that the interference fringe could still be observed when the wedge tip thickness reached mm order,so it could be used to measure the shape variable of the object in mm order.

关 键 词：可调劈尖 双点光源 非定域干涉 二次成像法 

分 类 号：O436.1[机械工程—光学工程]