四象限探测器的信号光捕获与跟踪技术研究  

Research on acquisition and tracking technology for the four-quadrant detector

作　　者：鲁倩[1] 任斌[1] 边晶莹[1] Lu Qian;Ren Bin;Bian Jingying(Xi′an Institute of Space Radio Technology,Xi′an,Shaanxi 710000,China)

机构地区：[1]西安空间无线电技术研究所,陕西西安710000

出　　处：《光电工程》2020年第3期155-160,共6页Opto-Electronic Engineering

摘　　要：针对空间激光通信系统小型化设计的需求,提出了使用四象限探测器实现捕获与跟踪的方案。通过分析四象限探测器上光斑的位置分布,推导了三种光斑分布的4QD捕获牵引模型,通过对4QD光斑位置的解算以及与跟踪机构的精准标定,实现了4QD的高精度跟踪。在实验室基于一台激光终端与系统测试平台,对四象限探测器的捕获与跟踪方案及性能进行了实验验证,测试结果表明,在实验室动态条件下,用4QD作为捕获及跟踪探测器,捕获概率高达100%,跟踪精度优于3μrad,验证了该方案的可行性,为激光终端小型化设计奠定了基础。Aiming at the space laser communication system requirement of miniaturization,this paper proposes a scheme of using the four-quadrant detector to complete the acquisition and tracking.By analyzing the position distribution of the spots on the four-quadrant detector(4 QD),the acquisition models are derived for the three kinds of spots distribution.Through the calculation of the position of the spots and the accurate calibration of the tracking mechanism,the high precision tracking is realized.Then besed on the laserteco and system test platform the capture and tracking scheme and detection performance of the 4 QD are experimentally verified.The test results show that under the laboratory dynamic conditions,using 4 QD as the capture and tracking detector,the capture probability is up to 100%,and tracking accuracy is better than 3μrad,which verifies the feasibility of the scheme and lays a foundation for the miniaturization design of the laser terminal.

关 键 词：激光通信 四象限探测器 捕获与跟踪复用 

分 类 号：TB872[一般工业技术—摄影技术] TN929.1[电子电信—通信与信息系统]