磁致旋光效应测量透明液体浓度的装置设计  

Design of Device for Measuring the Concentration of Transparent Liquid by Magneto-optical Rotation Effect

作　　者：胡宇阳 郑大怀 宋柏君 魏鸿儒 步献东 王晓杰 HU Yuyang;ZHENG Dahuai;SONG Baijun;WEI Hongru;BU Xiandong;WANG Xiaojie(School of Physics,Nankai University,Tianjin 30071,China;National Demonstration Center for Experimental Physics Education,Nankai University,Tianjin 30071,China)

机构地区：[1]南开大学物理科学学院,天津300071 [2]南开大学基础物理国家级实验教学示范中心,天津300071

出　　处：《实验室研究与探索》2023年第10期94-98,共5页Research and Exploration In Laboratory

基　　金：教育部高等学校大学物理课程教学指导委员会课题(DJZW202310hb,WX202206);教育部产学合作协同育人项目(220905259141912);南开大学教改项目(22NKSYKF05,NKJG2022096)。

摘　　要：利用磁致旋光效应设计了一种透明液体浓度的测量装置。该装置引入可精准旋转检偏器,在消光位置附近测量透射光强,通过数据拟合精确确定消光位置,从而提高了测量分辨率。通过测量不同质量分数的NaCl溶液浓度,分辨率在1.08%以内;同时,引入反射腔实现了低磁场强度下NaCl溶液的测定浓度,分辨率可提高到0.28%。该装置融合光学、电磁学等知识,能够应用于大学生物理实验教学。A device for measuring the concentration of transparent liquid is designed based on the magneto-optic effect.A precise rotating analyzer is introduced to measure the transmitted light intensity near the extinction position,which is determined through data fitting,and improve the measurement accuracy.The resolution of NaCl solution is less than 1.08%by measuring different concentration of NaCl solution,and the resolution is improved to 0.28%by introducing reflection cavity.This experimental device integrates the knowledge of optics and electromagnetism,which can be applied to the physics experiment teaching of college students.

关 键 词：磁致旋光效应 透明液体 浓度 反射腔 

分 类 号：O436.4[机械工程—光学工程]