Study on Orthogonality of Light Vector Trajectory of 45 ° Scanning Mirror in Fine Pointing Mechanism

Xiangyang LI; Xiangyue LI; Xueping SUN; Jiahua ZHANG; Bin REN; Xuejiao ZHANG; Anhe CHEN; Xiang CHEN; Wenrui ZHANG

doi:10.12382/bgxb.2021.0876

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Study on Orthogonality of Light Vector Trajectory of 45 ° Scanning Mirror in Fine Pointing Mechanism

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- Study on Orthogonality of Light Vector Trajectory of 45 ° Scanning Mirror in Fine Pointing Mechanism
- Acta Armamentarii Vol. 44, Issue 4, Pages: 1193-1199(2023)
- 作者机构：
  
  1. 中国空间技术研究院西安分院, 陕西西安 710100
  2. 陕西航天时代导航设备有限公司, 陕西宝鸡 721305
  3. 西安工业大学光电工程学院, 陕西西安 710032
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2021.0876
  CLC：
- Received：28 December 2021，
  
  Online First：25 July 2023，
  
  Published：28 April 2023
- 稿件说明：
移动端阅览
Xiangyang LI, Xiangyue LI, Xueping SUN, et al. Study on Orthogonality of Light Vector Trajectory of 45 ° Scanning Mirror in Fine Pointing Mechanism[J]. Acta Armamentarii, 2023, 44(4): 1193-1199.
DOI：

Xiangyang LI, Xiangyue LI, Xueping SUN, et al. Study on Orthogonality of Light Vector Trajectory of 45 ° Scanning Mirror in Fine Pointing Mechanism[J]. Acta Armamentarii, 2023, 44(4): 1193-1199. DOI： 10.12382/bgxb.2021.0876.

摘要

在空间激光通信终端中

精指向机构45°扫描镜振动轴绕不同轴系振动时

捕获跟踪CMOS相机上的扫描轨迹不正交

使得激光终端扫描概率降低、光轴在轨标定难度增大。为研究其内在机理

利用光学追迹的方法建立三维光矢量扫描轨迹模型

计算并仿真45°反射镜振动轴沿两组常用正交轴扫描时

CMOS相机上光矢量轨迹的正交性

搭建实验测试系统验证该计算仿真在精指向机构扫描过程反射光矢量的性能。研究结果表明:45°扫描镜振动轴绕

=(1

-1

和

=(1

-1

振动扫描轨迹的不正交度为19.47°

不随扫描角度的变化而发生变化

实验验证和理论结果一致;45°扫描镜振动轴绕

轴和

振动时

由扫描角度和扫描轨迹正交性曲线关系

得出CMOS相机上扫描轨迹夹角随着扫描角度变化而变化

当扫描角度为9mrad时

扫描轨迹的不正交度为6.4mrad。该研究对空间激光通信终端精指向机构扫描的内在机理、安装方式、轴外视场光轴标定等有深刻的认识和指导意义。

Abstract

In the laser communication terminal in space

the scanning trajectory on the CMOS camera is not orthogonal when the fine pointing mechanism of the 45° scanning mirror vibrates around different shaft systems

which reduces the scanning probability and makes it more difficult to calibrate the optical axis of the laser terminal in orbit. In order to solve this problem

the ray tracing method is used to establish a three-dimensional light vector scanning trajectory model

and the orthogonality of the light vector trajectory on the CMOS camera is calculated and simulated when the vibration axis of the 45° mirror scans along two sets of commonly used orthogonal axes. Then

an experimental test system is built to verify the performance of the reflected light vector in the scanning process of the fine pointing mechanism. The results show that: the non-orthogonality of the 45° scanning mirror vibrates around

=(1

-1

and

=(1

-1

is 19.47°

and the included angle of the scanning trajectory on the CMOS camera changes with the scanning angle according to the relationship between the scanning angle and the orthogonality curve of the sc

anning trajectory; the non-orthogonality of the scanning trajectory is 6.4 mrad when the scanning angle is 9 mrad. This study provides insights into the internal mechanism and has guiding significance for the installation mode and optical axis calibration of the off-axis field of view of the fine pointing mechanism of space laser communication terminal.

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Keywords

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