大学物理 ›› 2013, Vol. 32 ›› Issue (2): 47-47.

• 著者文摘 • 上一篇    下一篇

测量平板玻璃折射率实验中干涉条纹不清晰原因的探讨

王菁 李朝荣 黄江 裴朝 李华   

  1. 北京航空航天大学物理科学与核能工程学院,北京100191
  • 出版日期:2013-02-20 发布日期:2013-02-20

Iscussion of unclear interference fringe in the experiment of measuring refractive index of plate glass

  • Online:2013-02-20 Published:2013-02-20

摘要: 分析了利用分光仪测量平板玻璃折射率中条纹不清晰的原因,借助数值模拟得出与实验观测相同的干涉光强分布,明确了平板玻璃的楔角是干涉条纹不清晰的主要原因.通过对比不同楔角下条纹可见度随平板玻璃反射率的变化关系,确定了平板玻璃的最佳反射率为0.5至0.7之间,使学生在实验中可以观察到清晰的干涉条纹.

关键词: 分光仪, 多光束干涉, 楔角, 可见度

Abstract: The reason of the emergence of unclear interference fringe in measurement of refractive index of plate glass using spectrometer is analyzed. According to the similar intensity distribution of simulation and observa- tion, the wedge angle of plate glass is the main cause. Based on the contrast of interference stripe varied by reflection of plate glass in different angles, to make sure the students could observe clear interference stripe, reflection of plate glass should be chosen between 0.5 and 0.7.

Key words: spectrometer, multi-beam interference, wedge angle, contrast

中图分类号: 

  • O436.1