中国空间科学技术

中国空间科学技术 ›› 2022, Vol. 42 ›› Issue (1): 107-113.doi: 10.16708/j.cnki.1000-758X.2022.0012

• 论文 • 上一篇    下一篇

异形光斑的高精度光束偏转角度测量

邹炎升，张乃元，袁辉，刘陈，刘德明   

  1. 华中科技大学 光学与电子信息学院，武汉430074
  • 出版日期:2022-02-25 发布日期:2022-01-27
  • 基金资助:
    民用航天技术预先研究项目；国家自然科学基金（61975064）

High precision deflection angle measurement of irregular light spot

ZOU Yansheng, ZHANG Naiyuan, YUAN Hui，LIU Chen, LIU Deming   

  1. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074,China
  • Published:2022-02-25 Online:2022-01-27

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摘要： 大气湍流通常会造成激光光斑畸变为不规则的异形光斑，针对目前四象限探测器(QD)对空间光通信中不规则光斑偏转角度测量精度不足的问题，提出了一种基于多源信息融合的高精度光束偏转角度测量方法。该方法通过对QD及电荷耦合元件(CCD)的数据信息进行融合分析，在保持QD高分辨率和高响应速度的基础上，提高QD对不规则光斑偏转角的测量精确度。通过仿真与实验验证，融合算法相对于传统QD算法对不规则光斑偏转角的测量均方根误差改善了55.56%，测量误差峰峰值减少了42.98%。

关键词: 空间光通信, 光束偏转角, 异形光斑, 多源信息融合, 四象限探测器(QD)

Abstract: For the space laser communication, the laser spot is usually distorted by the atmospheric turbulence and becomes the irregular shaped spot. To meet the challenge of insufficient angle measurement accuracy with four-quadrant detector (QD) for irregular light spot, a high precision deflection angle measurement method based on multi-source information fusion was proposed. The proposed method improves the measurement accuracy of the irregular spot deflection angle by integrating the data of QD and the image of charge coupled device (CCD), while maintaining high measurement resolution and high response speed of QD-based measurement method. Compared with the conventional QD algorithm, the results of both simulation and experiment show that, with the fusion algorithm, the root mean square error and the peak-to-peak measurement error are reduced by 55.56% and 42.98%, respectively.

Key words: space optical communication, beam deflection angle, irregular light spot, multi-source information fusion, fourquadrant detector (QD)