一种适于小角度测量的旋光角度测量方法研究  

Research on detection method of optical rotation measurement for small angle

作　　者：夏桂珍[1] 

机构地区：[1]武警上海政治学院实验室管理中心,上海200435

出　　处：《大学物理》2011年第11期28-31,共4页College Physics

摘　　要：通过对输出信号的分析,提出了一种适于小角度测量的旋光角度测量方法,此方法通过检测经过旋光物质并经法拉第磁光调制的信号与不加旋光物质而仅经法拉第磁光调制的信号的波形宽度来实现对旋光物质旋光角度的测量.同时,利用搭建的测试系统,配置不同浓度的白砂糖溶液进行了验证性实验.实验结果表明,旋光角度与溶液浓度之间成很好的线性关系,线性拟合系数达到了0.998以上,旋光角度测量的分辨率可达到0.01°.A detection method of optical rotation measurement for small angle is proposed by the analysis of output signals. Two kinds of light signals are detected in the experiment. One is detected, after it is sent through the optically active solution and modulated by Faraday coil. The other is just modulated by Faraday coil. By measuring the width of the waveform of these signals, the optical rotation can be obtained. Meanwhile, based on the already built system, sugar solutions with different concentrations are prepared for measurement. The experimental results show that there is a good linear relation between the solution concentration and the optical rotation. The goodness for linear fitting is up to 0. 998. The resolving capability of optical rotation can reach 0.01 degree.

关 键 词：旋光角度 法拉第磁光效应 小角度测量 

分 类 号：O436.3[机械工程—光学工程]