基于空间光调制器的光束大角度扫描技术研究  

Large angle range beam scanning control based on crystal spatial light modulator

作　　者：郑新波 张旋 栾琳 洪汉玉[2] ZHENG Xinbo;ZHANG Xuan;LUAN Lin;HONG Hanyu(Key Laboratory of Metamaterial Technology Photoelectric Application Engineering,Kuang-chi Institute of Advanced Technology,Shenzhen 518000,China;School of Electrical Information Engineering,Wuhan Institute of Technology,Wuhan 430073,China)

机构地区：[1]深圳光启高等理工研究院深圳超材料技术光电应用工程实验室,广东深圳518000 [2]武汉工程大学电气信息学院,湖北武汉430073

出　　处：《应用光学》2020年第4期816-821,共6页Journal of Applied Optics

基　　金：深圳市海外高层次人才创新创业专项资金(KQE201106020031A)。

摘　　要：为实现一束激光在90°锥形范围内的扫描,利用液晶空间光调制器在光束偏转控制时精度高、无机械惯性等优点,研究并建立了基于液晶空间光调制器的光束偏转和角放大光路系统。提出了空间光调制器的可编程相位调制算法和角放大光路结构,推导了空间光调制器光束偏转角度与相位灰度驱动图的关系,设计了角度放大倍率高于22倍的角放大光路系统。在此基础上,建立了光束扫描控制实验系统,对该装置角度出射范围进行了测量,将实际的角放大倍率与设计值进行对比。实验结果表明:研制系统的出射视场角可达91.22°,并可通过畸变校正实现出射视场角范围内的规则形状扫描。该研究在光束敏捷控制、无线激光通信、目标搜索与追踪等领域具有重要的研究价值和应用前景。In order to realize the laser scanning control within 90°cone angle,a beam deflection and angle amplification optical path system based on LCSLM(liquid crystal spatial light modulator)were researched and established by using the advantages of high precision and no mechanical inertia in beam deflection control.The programmable phase modulation algorithm and angle amplification optical path structure of spatial light modulator was proposed.The relations between the beam deflection angle of spatial light modulator and the phase gray scale driving diagram was derived,and the angle amplification optical path system with an angle magnification ratio higher than 22 times was designed.On this basis,the experimental system of beam scanning control was established,the angle emergence range of the device was measured,and the actual angle magnification ratio was compared with the designed value.The experimental results show that the emergence field angle of the developed system can reach to 91.22°,and the regular shape scanning within the range of emergence field angle by distortion correction can be realized.This research has important research value and application prospect in the fields of beam agile control,wireless laser communication,target search and tracking.

关 键 词：空间光调制器 相位调制 光束扫描 角放大光路 

分 类 号：TN29[电子电信—物理电子学] O435.1[机械工程—光学工程]