摘要
折射率是液体的重要特性,对于透明液体常用光学干涉方法进行检测。大部分方法需要测量干涉条纹的移动量,但测量中不容易判断是否恰好是整数级次条纹移动,给结果带来一定的误差。针对这个问题,提出了环形干涉光路,实现顺时针和逆时针光路零光程差、零角度差的干涉光斑,而不是常规的干涉条纹。设计了适合该光路的检测原理,旋转液体盒一定角度后,通过测量干涉光斑的移动量,就可以计算出液体折射率。实验结果表明,测量的去离子水的折射率与标准值相对误差小,实验光路与原理设计合理可靠,为测量液体折射率提供新思路。
The refractive index is an important property of liquid,which is often detected by the optical interference method for transparent liquid.Most methods need to measure the movement of interference fringes,but it is difficult to judge whether it is exactly the integer order fringes movement,which will bring some errors.To solve this problem,this paper proposed a ring interference light path,which realized the interference spot with zero optical path difference and zero angle difference between clockwise and counterclockwise light paths,instead of the conventional interference fringes.The detection principle suitable for this optical path was also designed.After rotating the liquid box at a certain angle,the liquid refractive index can be calculated by measuring the movement of the interference spot.The experimental results showed that the relative error between the measured refractive index of deionized water and the standard value was small.It demonstrates that the design of the experimental optical path and principle are reasonable and reliable,which provides a new method for measuring the refractive index of the liquid.
作者
熊学辉
林荷玉
俞纪翔
吴林法
张立辉
XIONG Xuehui;LIN Heyu;YU Jixiang;WU Linfa;ZHANG Lihui(School of Optoelectronic Materials&Technology,Jianghan University,Wuhan 430056,Hubei,China)
出处
《江汉大学学报（自然科学版）》
2023年第6期18-24,共7页
Journal of Jianghan University：Natural Science Edition
关键词
环形干涉光路
干涉光斑
折射率
optical loop interference
interfering spots
refractive index
