线性双折射对法拉第镜式光学电流互感器输出影响的理论分析  

Theoretical analysis of the effects of linear birefringence on the output of a Faraday mirror-typed optical current transformer

作　　者：王政平[1] 刘晓瑜[1] 康崇[1] 

机构地区：[1]哈尔滨工程大学理学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2005年第5期688-692,共5页Journal of Harbin Engineering University

基　　金：哈尔滨工程大学基础研究基金资助项目(HEUF04015)

摘　　要：从理论上推导并分析了线性双折射及入射起偏角对法拉第镜式光学玻璃电流互感器输出特性的影响,给出了法拉第镜式光学玻璃电流互感器在非理想状态下线性双折射及入射起偏角对系统输出电压的调制函数的数学表达式.结果表明,线性双折射及入射起偏角分别以S(Δ)函数(抽样函数)c、os 4θ的形式调制理想法拉第镜式光学玻璃电流互感器输出信号的尺度因子,同时由于入射起偏角的影响,系统将产生一个直流分量-sin 4θ.当入射起偏角取0°、45°、90°…等特殊值时,该直流分量为0.这一工作结果对于光学玻璃电流互感器的研究、设计具有一定的理论参考意义.The effects of the linear birefringence and incident polarizing angle upon the output characteristics of a bulk glass optical current sensor were theoretically analyzed. In addition, a modulation formula is given to describe the influences of the linear birefringence to the output of the sensor. Results show that the linear birefringence and the incident polarizing angle will modulate the scale factor of the system with a factor of S （δ）·cos （4θ）. Meanwhile, there will be a DC component of - sin 4θ generated by the incident polarizing angle, which will be zero when the incident polarizing angle has some special values such as 0, 45, or 90 degree. These results might be useful to the researchers and designers of bulk glass optical current sensors.

关 键 词：法拉第镜 光学电流互感器 琼斯矩阵 线性双折射 输出特性 法拉第 光学玻璃 调制函数 理想状态 直流分量 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置] TM452.93[自动化与计算机技术—控制科学与工程]