Method Employing a Retarder to Measure the Linear Birefringence Inside Bulk Glass Current Sensing Heads
延迟片法测量光学玻璃电流传感头线性双折射

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.