液体表面光场环状暗斑效应及折射率测量  

Light field circular blur effect on liquid surface and refraction index measurement

作　　者：吴俊林[1] 杨宗立[1] 袁胜利[1] 苗润才[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,西安710062

出　　处：《光学技术》2004年第3期308-310,共3页Optical Technique

基　　金：教育部骨干教师基金(200065);陕西省自然科学基金项目(2002A04);陕西师范大学重点项目。

摘　　要：实验发现透过液体介质的光场出现了一环状暗斑效应。进一步研究表明,该效应是由于光在液体介质表面发生全反射引起的,环状暗斑半径的大小与液体折射率和液体厚度有关,当液体折射率一定时,液体厚度越厚,暗斑半径越大;光液体厚度一定时,折射率越大,暗斑半径越小。进而建立了环状暗斑半径与液体折射率之间的关系,提出了一种测量液体折射率的新方法。A circular blur effect is discovered in the experiment of the light field through the liquid. Farther investigation show that the effect is due to total refraction of the light field on the liquid surface. The circular blur radius has a relationship with the liquid refraction index and the thickness of the liquid. If the liquid refraction index was fixed, the greater the liquid thickness, the greater the circular blur radius; if the thickness of the liquid was fixed, the greater the liquid refraction index, the littler the circular blur radius. The relationship between the circular blur radius with the liquid refraction index is established. A new means to measure the liquid refraction index is proposed.

关 键 词：透明液体 环状暗斑效应 折射率 

分 类 号：O435[机械工程—光学工程]