光学电压传感器中λ/4器件的设计与应用

Design and Application of the Quarter Wave Plate in Optical Voltage Transformer

从光学电压传感器的基本原理出发 ,应用电磁场理论讨论了线偏振光经全反射后的相位差问题 ,提出了用 90°直角棱镜的组合代替 1/ 4波长板 (λ/ 4波片 )的设计原则 ,给出了光学电压传感器结构设计方案。将该结构的光学电压传感器用于 110 k V光学电压互感器中 ,试验表明 :在 2 0 % UN 以上电压时 ,系统的线性相对偏差在± 0 .2 %以内。

Starting from the basic principle of optical voltage transformer,this paper discussed the problem of phase retardation due to the total internal reflection of a polarized beam using the electromagnetic field theory.A design which utilizes the combination of two prisms of different types of glass to replace a quarter wave plate is presented here.The structure disign scheme of optical voltage sensor is also provided.The test result shows that the linearity of the system is within ±0 2% after employing this kind of optical voltage sensor into a 110 kV optical voltage transformer.