基于线阵CCD的折射率和浓度测量装置

Device for Refractive Index and Concentration Measurement Based on Linear Array CCD

本文提出了一种结合激光器和线阵CCD的折射率测量方法,利用光线穿过平行板介质时产生横向位移的特性,实现对透明介质折射率和浓度的高效、准确测量。装置采用红色点状激光器作为稳定光源,并通过衰减片削弱光强,利用旋转平台精确调整入射角,最后用线阵CCD传感器捕捉光斑位置变化,再录入Matlab程序中,实现对介质折射率以及透明液体浓度的实时测量。

This study proposes a method for measuring refractive index by combining a laser and a linear array CCD.It takes advantage of the lateral displacement produced when light passes through parallel plate media to achieve efficient and accurate measurement of refractive index and concentration of transparent media.The device employs a red point laser as a stable light source,attenuating the light intensity through a neutral density filter,and precisely adjusting the incident angle using a rotating platform.Subsequently,the linear array CCD sensor captures changes in the position of the light spot,and the data is processed in Matlab to realize real-time measurement of the refractive index and concentration of transparent liquids.Experimental results demonstrate minimal errors and high stability when measuring PMMA,glass,and solutions of various concentrations.This design is also suitable for educational purposes,aiding in the understanding of the concept of refractive index.The research provides an innovative perspective for refractive index measurement,laying the technical foundation for future studies.