利用复合液芯柱透镜实现透明液体阿贝数的测量  

Measurement of Abbe number of transparent liquids using compound liquid-core cylindrical lenses

作　　者：陈一涵 李蓉青 孙丽存 CHEN Yihan;LI Rongqing;SUN Licun(School of Physics and Electronic Information,Yunnan Normal University,Kunming 650500,China;Yunnan Key Laboratory of Optoelectronic Information Technology,Kunming 605000,China)

机构地区：[1]云南师范大学物理与电子信息学院,云南昆明650500 [2]云南省光电信息技术重点实验室,云南昆明650500

出　　处：《光学技术》2024年第6期690-697,共8页Optical Technique

基　　金：国家自然科学基金(62065019);云南省中青年学术和技术带头人后备人才项目(202205AC160029);云南省基础研究专项面上项目(202401AT070100);云南师范大学大学生科研训练基金项目(KX2023135)。

摘　　要：阿贝数是光学设计领域的重要基础参数,较固体而言液体阿贝数的数据相对匮乏,随着液体光学系统的发展,液体阿贝数的准确测量日趋重要。目前常用的测量透明液体阿贝数的方法存在操作过程繁琐、测量效率低、不适用于有毒、易挥发液体的测量等缺点。为此,提出一种基于复合液芯柱透镜的散焦宽度测量透明液体阿贝数的方法。实验过程中仅需转动同轴滤光片转轮更换光源处红光、黄光、青光的滤波片,即可利用CCD快速采集三种光源照射下的散焦图像,根据散焦图像宽度与液体折射率之间的良好线性关系得到3种波长下透明液体的折射率,从而计算其阿贝数。该方法兼具实验装置简单、易操作,测量速度快等优势,可用于迅速扩充透明液体阿贝数这一基础数据。Abbe number is an important fundamental parameter in the field of optical design.Compared to solids,data of liquid Abbe number is relatively scarce.With the development of liquid optical systems,accurate measurement of liquid Abbe number is becoming increasingly important.The commonly used methods for measuring the Abbe number of transparent liquids have drawbacks such as cumbersome operation,low measurement efficiency,and unsuitable for measuring toxic and volatile liquids.Therefore,a method for measuring the Abbe number of transparent liquids based on the defocusing width of a composite liquid-core cylindrical lens is proposed.During the experiment,it is only need to rotate the coaxial filter wheel to replace the filters for red,yellow,and cyan light,and then CCD can capture the defocused images under three different light sources quickly.Based on the good linear relationship between the defocused image width and the refractive index of the liquid,the refractive index of the transparent liquid at three wavelengths can be obtained,and the Abbe number can be calculated.This method combines the advantages of simple experimental setup,easy operation,and fast measurement,which can be used to quickly expand the basic data of transparent liquids Abbe number.

关 键 词：应用光学 液体阿贝数 散焦宽度法 液体折射率 复合液芯柱透镜 

分 类 号：O439[机械工程—光学工程] O435[理学—光学]