Design of imaging optical system for space target with large depth of field

Zhi-wei SUN; Wei-qi LIU; Bo LYU; Xiao-tian WU

doi:10.37188/CJLCD.2021-0183

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Design of imaging optical system for space target with large depth of field

Target Identification and Imaging | 更新时间：2021-11-08

- Design of imaging optical system for space target with large depth of field
- Chinese Journal of Liquid Crystals and Displays Vol. 36, Issue 11, Pages: 1597-1604(2021)
- 作者机构：
  
  1.中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
  2.中国科学院大学, 北京 100049
- 作者简介：
- 基金信息：
  
  Supported by Equipment Pre-research of GF Project(GFZX0403260206)
- DOI：10.37188/CJLCD.2021-0183
  CLC： TP391.4;TH691.9
- Received：12 July 2021，
  
  Revised：16 August 2021，
  
  Published：2021-11
- 稿件说明：
移动端阅览
Zhi-wei SUN, Wei-qi LIU, Bo LYU, et al. Design of imaging optical system for space target with large depth of field[J]. Chinese journal of liquid crystals and displays, 2021, 36(11): 1597-1604.
DOI：

Zhi-wei SUN, Wei-qi LIU, Bo LYU, et al. Design of imaging optical system for space target with large depth of field[J]. Chinese journal of liquid crystals and displays, 2021, 36(11): 1597-1604. DOI： 10.37188/CJLCD.2021-0183.

摘要

为了在不降低空间目标成像光学系统分辨率的前提下，扩展系统的景深，并且提高系统的可靠性，本文提出并设计了一种基于波前编码技术扩展景深的空间目标成像光学系统。在所设计的初始空间目标成像光学系统的基础上，基于不同物距调制传递函数曲线的一致性以及图像的可复原性优化了立方相位板，并且利用FOPD算法，对中间图像实现了较好的复原效果。对比了初始光学系统与波前编码光学系统的成像效果，结果显示波前编码光学系统的焦深和景深得到显著的扩展。该光学系统总长为41 mm，焦距为20 mm，工作波长为850 nm。仿真实验结果表明，无需调焦机构，该系统的焦深达到了原系统的28倍，系统景深从0.956~1.1 m扩展至0.5~130 m。该系统可满足于空间交会对接、卫星捕获等领域无调焦机构大景深成像的需求。

Abstract

In order to extend the depth of field and improve the reliability of the system without reducing the resolution of the imaging optical system for space targe

this paper proposes and designs an imaging optical system for space target based on wavefront coding technology to extend the depth of field. On the basis of the initial imaging optical system for space target

the cubic phase plate is optimized based on the consistency of the modulation transfer function curves of different object distances and the recoverability of the images. The FOPD algorithm is used to achieve a better intermediate images recovery effect. The effects of the initial optical system and the wavefront coding optical system are compared

and the results show that the depth of focus and depth of field of the wavefront coding optical system have been significantly expanded. The total length of the optical system is 41 mm

the focal length is 20 mm

the working wavelength is 850 nm. The simulation experiment results show that without the need for focusing mechanism

the depth of focus of the system is 28 times that of the initial system

and the depth of field of the system is extended from 0.956~1.100 m to 0.5~130 m. The system can meet the needs of large depth of field imaging without focusing mechanism in the fields of space rendezvous and docking

satellite capture and so on.

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Related Institution

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Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

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