狭缝和棱脊不平行对菲涅耳双棱镜干涉的影响  

Influence of Nonparallel Slot and Prism Ridge on Interference of Fresnel Double Prism

作　　者：韩佩杉 陆泽辉 樊代和[1,2] 贾欣燕 魏云 常相辉[1,2] 刘其军[1,2] Han Peishan;Lu Zehui;Fan Daihe;Jia Xinyan;Wei Yun;Chang Xianghui;Liu Qijun(School of Physical Science and Technology,Southwest Jiaotong University,Chengdu,Sichuan 611756,China;National Demonstration Center for Experimental Physics Education,Southwest Jiaotong University,Chengdu,Sichuan 611756,China)

机构地区：[1]西南交通大学物理科学与技术学院,四川成都611756 [2]物理国家级实验教学示范中心(西南交通大学),四川成都611756

出　　处：《激光与光电子学进展》2019年第23期248-254,共7页Laser & Optoelectronics Progress

基　　金：西南交通大学个性化实验项目(GX201913167);西南交通大学本科教育教学研究与改革项目(1904008,1802034,1801012)

摘　　要：利用数值仿真和实验验证方法,解释用线光源作为光源的菲涅耳双棱镜干涉实验中,狭缝必须与双棱镜棱脊平行才能观察到清晰干涉条纹的原因。基于几何光学和干涉原理,理论上得出观察屏上菲涅耳双棱镜干涉强度分布公式,通过数值模拟得到干涉条纹可见度随狭缝与棱脊夹角的变化曲线。理论分析表明,随着夹角变大,干涉可见度将出现先下降,再升高,然后再次下降的现象。最后,对理论结果进行实验验证,表明实验结果与数值模拟结果基本一致。In this paper,numerical simulation and experimental verification methods are presented to investigate the influence of nonparallel slot and double-prism ridge in observing clear interference fringes.This result is essentially in the Fresnel double prism interference experiment using a line source.Initially,the interference intensity distribution formula of the Fresnel double prism on the observation screen is theoretically obtained.This is accomplished using geometrical optics and the principle of interference.In addition,the visibility of the interference fringe as a function of the angle between the slot and the ridge is obtained using numerical simulation.Theoretical analysis shows that as the angle increases,the interference visibility falls,then rises,and then falls again.Finally,an attempt to experimentally verify the theoretical results is also presented.The experimental results seem to be consistent with the numerical simulation results.

关 键 词：物理光学 干涉 菲涅耳双棱镜 可见度 

分 类 号：O436[机械工程—光学工程]