延迟片法测量光学玻璃电流传感头线性双折射

测量光学传感头内线性双折射的大小对于提高光学电流传感器的性能有重要意义.本文报告了一种测量光学玻璃电流传感头线性双折射的新方法,以琼斯矩阵为数学工具给出了对该方法的理论分析及测量不确定度分析,并用实验方法给出了应用实例.此方法的主要优点是弥补了以前报告测量方法的不足,即无法唯一地确定光学玻璃电流传感头线性双折射的大小.本方法采用的光路所用元件容易获得且测量结构简单实用.

Method Employing a Retarder to Measure the Linear Birefringence Inside Bulk Glass Current Sensing Heads

It is important to measure the linear birefringence inside the sensing head for the property enhancement of the optical current sensors. A method employing a retarder to measure the linear birefringence inside the bulk glass current sensing head is reported in this paper. The theoretical analyses of the principle and the measurement uncertainty are given using the Jones Matrix as a mathematical tool. An applied example is also given. The main advantage of this method is that it makes up the flaw of the method reported before which can not uniquely determine the value of the linear birefringence inside the bulk glass sensing head of an optical current sensor. Furthermore, there are some other advantages such as simple structured,practical and that the devices needed are easy to obtain.