大学物理 ›› 2017, Vol. 36 ›› Issue (3): 28-31.doi: 10.16854 /j.cnki.1000-0712.2017.03.008

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物像等大法测量双棱镜干涉中虚光源间距

刘秋武,王小怀   

  1. 韩山师范学院物理与电子工程学院,广东潮州521041
  • 收稿日期:2016-06-21 修回日期:2016-09-05 出版日期:2017-03-20 发布日期:2017-03-20
  • 作者简介:刘秋武( 1975—) ,男,广东潮州人,韩山师范学院物理与电子工程学院实验师,博士,主要从事物理学实验教学和光学传感测试研究工作.
  • 基金资助:
    2014 年广东省高等教育教学改革项目( GDJG20142402) 资助

Measurement of distance of virtual light sources using object equaling image method in Fresnel biprism interference

LIU Qiu-wu,WANG Xiao-huai   

  1. School of Physical and Electrical Engineering,Hanshan Normal University,Chaozhou,Guangdong 521041,China
  • Received:2016-06-21 Revised:2016-09-05 Online:2017-03-20 Published:2017-03-20

摘要: 对菲涅耳双棱镜干涉测钠光波长实验中应用二次成像法测量双虚光源间距的相对误差进行分析,指出小像的测量误差是影响测量双虚光源间距的主要因素,提出改用当虚光源位于透镜前2 倍焦距时物像等大的测量方法,可较为准确的测量双虚光源间距和双虚光源到测微目镜的分划板的距离.

关键词: 菲涅耳双棱镜, 双虚光源间距, 二次成像法, 物像等大法

Abstract: In this paper,we analyze the relative error of the distance between two virtual light sources by secondary imaging method in Fresnel biprism interference,derive that the measurement error of the smaller image is a major factor,and put forward a more accurate method by measuring image size when the slit is located 2f in front of the lens to measure the distance of two virtual light sources and the inference distance between the virtual light sources and the micrometer eyepiece reticle.

Key words: Fresnel biprism, distance of virtual light source, second imaging method, object equaling   image method