基于迭代查询算法的偏光轴位测量方法研究  

Research on polarization axis detection method based on iterative query algorithm

作　　者：郑伟峰 邓水发 蒋淑恋 褚旭阳 ZHENG Weifeng;DENG Shuifa;JIANG Shulian;CHU Xuyang(Xiamen Institute of Measurement and Testing,Xiamen 361004,China;School of Aerospace Engineering,Xiamen University,Xiamen 361102,China)

机构地区：[1]厦门市计量检定测试院,福建厦门361004 [2]厦门大学航空航天学院,福建厦门361102

出　　处：《中国测试》2024年第11期114-119,159,共7页China Measurement & Test

基　　金：国家市场监督管理总局2020年科技计划项目(2020MK118)。

摘　　要：针对偏光轴位测量精度和效率低下的问题,该文设计一种新型偏光轴位测量装置及其光路结构和偏光轴位角度查询方案。线偏振光通过一对匀速同步旋转且偏光轴位夹角为45°的标准偏光片组后,透射光光强呈现相位差90°的正余弦变化,实时采集透射光强及旋转角度,可建立其映射关系。为解决被测偏光片与标定用偏光片样品的透射光强和旋转角度映射关系不匹配的问题,提出一种迭代查询算法,建立透射光强修正系数的数学模型,通过反复迭代计算获得查询基准值的修正系数,进而快速有效地在已标定的映射关系表中查询计算被测偏光片的偏光轴位角度值。仿真和试验结果表明,提出的迭代修正算法能快速进行自适应修正,修正系数仅需有限次迭代查询计算就能快速跟踪上目标值并保持稳定。In response to the low accuracy and efficiency of polarization axis measurement,this paper designs a new type of polarization axis measurement device,its optical path structure,and polarization axis angle query scheme.After linearly polarized light passes through a pair of standard polarizers with a uniform synchronous rotation and a polarization axis angle of 45°,the transmitted light intensity shows a sine cosine change with a phase difference of 90°.Real time collection of transmitted light intensity and rotation angle can establish their mapping relationship.To solve the problem of mismatch in the transmission light intensity and rotation angle mapping relationship between the tested polarizer and the calibrated polarizer sample,an iterative query algorithm is proposed.A mathematical model for the transmission light intensity correction coefficient is established,and the correction coefficient for the query reference value is obtained through repeated iteration calculation.This can quickly and effectively query and calculate the polarization axis angle value of the tested polarizer in the calibrated mapping relationship table.The simulation and experimental results show that the proposed iterative correction algorithm can quickly perform adaptive correction,and the correction coefficient can quickly track the target value and maintain stability with only a limited number of iterative query calculations.

关 键 词：偏光轴位 查表 迭代 角度 

分 类 号：TB971[一般工业技术—计量学]