空间超大幅宽低畸变红外成像扫描控制

刘小勇; 曹开钦; 刘银年

doi:10.3788/OPE.20182601.0208

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空间超大幅宽低畸变红外成像扫描控制

信息科学 | 更新时间：2020-08-13

- 空间超大幅宽低畸变红外成像扫描控制
- Scanning control of spaceborne infrared imaging with super-swath and low distortion
- 光学精密工程 2018年26卷第1期页码：208-217
- 作者机构：
  
  1.中国科学院上海技术物理研究所中国科学院红外探测与成像技术重点实验室, 上海 200083
  2.中国科学院大学, 北京 100049
  3.中国科学院上海技术物理研究所启东光电遥感中心, 江苏启东 226200
- 作者简介：
  
  [ "刘小勇(1987-), 男, 广西桂林人, 博士研究生, 2011年于广西大学获得学士学位, 主要从事红外成像光机扫描控制系统方面的研究。E-mail:lxyung@foxmail.com" ]
  [ "刘银年(1971-), 男, 甘肃武威人, 研究员, 博士生导师, 1994年于西北师范大学获得学士学位, 1997年于中国科学院西安光学精密机械研究所获得硕士学位, 2005年于中科院上海技术物理研究所获得博士学位, 主要从事高光谱遥感成像技术方面的研究。E-mail:ynliu@mail.sitp.ac.cn" ]
- 基金信息：
  
  国家重点研发计划资助项目(2016YFB0500400);国家高分辨率对地观测系统重大专项资助(A0106/1112)
- DOI：10.3788/OPE.20182601.0208
  中图分类号： TP273
- 收稿日期：2017-06-13，
  
  录用日期：2017-8-9，
  
  纸质出版日期：2018-01-25
- 稿件说明：
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刘小勇, 曹开钦, 刘银年. 空间超大幅宽低畸变红外成像扫描控制[J]. 光学精密工程, 2018,26(1):208-217.

Xiao-yong LIU, Kai-qin CAO, Yin-nian LIU. Scanning control of spaceborne infrared imaging with super-swath and low distortion[J]. Optics and precision engineering, 2018, 26(1): 208-217.
刘小勇, 曹开钦, 刘银年. 空间超大幅宽低畸变红外成像扫描控制[J]. 光学精密工程, 2018,26(1):208-217. DOI： 10.3788/OPE.20182601.0208.

Xiao-yong LIU, Kai-qin CAO, Yin-nian LIU. Scanning control of spaceborne infrared imaging with super-swath and low distortion[J]. Optics and precision engineering, 2018, 26(1): 208-217. DOI： 10.3788/OPE.20182601.0208.

摘要

本文以空间超大幅宽低畸变红外变焦扫描成像系统为研究对象，分析给出地面畸变与成像系统瞬时视场角的关系，提出变速扫描成像并推导了扫描角速度公式。为解决匀速360°旋转扫描效率低和双向摆动扫描成像需安装扫描线矫正器所导致的系统复杂性高、可靠性低的缺点，设计了一种正弦加速度快速回扫的方法。对变速扫描以及正弦加速度快速回扫方法进行了仿真及实验，结果表明扫描控制系统慢速扫描与快速回扫之间状态切换稳定，扫描起止角度误差仅为1.44角秒，扫描速度稳定度为±0.5%，扫描成像过程时间误差为83 μs，回扫时间误差为250 μs，整个扫描周期时间偏差小于1倍像元积分时间（355 μs），扫描效率达86%，在提高了扫描效率的同时减小对扫描机构的冲击与振动，满足成像要求。正弦加速度快速回扫方法对机载红外扫描成像系统快速回扫运动设计也具有一定指导意义。

Abstract

The relation between ground distortion and instantaneous field of view of the imaging system was analyzed; variable-speed scanning imaging was proposed and angular scanning speed formula was derived with infrared zoom scanning imaging system of super-swath low distortion in space as research object in this paper. Meanwhile

a kind of rapid fly-back method of sine acceleration was designed to solve the shortcomings such as low scanning efficiency of uniform 360° rotation

scanning line appliance needed to be installed for two-way swing scanning imaging and high complexity and low reliability of the system. Simulation and experiments were conducted on variable-speed scanning and rapid fly-back method of sine acceleration in this paper and the result indicates that the state shift between slow scanning and rapid fly-back of scanning control system is stable and the start and stop angle error of scanning is just 1.44 arc-second; scanning speed stability is ±0.5%; time error in scanning imaging process is 83 μs and fly-back time error is 250 μs; time deviation of the whole scanning period is less than pixel integral time (355 μs) and scanning efficiency reaches 86%

thus scanning efficiency is improved and impact and vibration of scanning mechanism are reduced meanwhile to satisfy imaging requirements. Rapid fly-back method of sine acceleration will provide a reference for rapid fly-back motion design of airborne infrared scanning imaging system.

关键词

Keywords

references

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