Real time digital correction for distortion in photoelectronical measuring system

LING Wei; WANG Zhi-qian; GAO Feng-duan

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Real time digital correction for distortion in photoelectronical measuring system

更新时间：2020-08-12

- Real time digital correction for distortion in photoelectronical measuring system
- Optics and Precision Engineering Vol. 15, Issue 2, Pages: 277-282(2007)
- 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,中国,130033
  2. 中国科学院研究生院,北京 100039
  3. 海军驻长春地区航空军代表室,吉林长春,130033
- 作者简介：
- 基金信息：
- DOI：
  CLC： V556;TP301.6
- Received：12 August 2006，
  
  Revised：20 December 2006，
  
  Published Online：20 February 2007，
  
  Published：20 February 2007
- 稿件说明：
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LING Wei, WANG Zhi-qian, GAO Feng-duan. Real time digital correction for distortion in photoelectronical measuring system[J]. Optics and precision engineering, 2007, 15(2): 277-282.
DOI：

LING Wei, WANG Zhi-qian, GAO Feng-duan. Real time digital correction for distortion in photoelectronical measuring system[J]. Optics and precision engineering, 2007, 15(2): 277-282. DOI：

摘要

根据视场角为70°的大视场光电测量系统中光学系统产生畸变的机理及径向变化的特点

设计了由11个等距激光目标点组成的畸变检测装置。对于不同的光学测量系统

按照畸变检测的三个步骤对光学系统的畸变进行检测

根据测量得到的系统畸变变化情况

拟合出实时测量时目标点在线阵CCD上成像位置的补偿方程

编写出成像位置数据采集及实时处理的补偿程序

提高了测量系统实时测量的精度。在对焦距为29.98 cm的光学系统进行实际校正测试中

结果表明

当目标物距为1 651.59 mm、物高为400.007 mm时

按照拟合的二次补偿方程进行计算补偿

可将畸变误差从校正前的-0.026 4 mm提高到校正后的-0.002 9 mm

并使系统整体检测精度从0.36%提高到0.04%。

Abstract

In the photoelectronical measuring system with a big field of view of 70°

distortion caused by optical system leads to the image of object in linear CCD deviation from the theoretical point

which results in system measuring errors. In the practical project measuring system

in order to improve measurement precision of the point of laser goal in the system

a set of installation for optical detection systematic distortion is designed. This installation on the basis of distortion mechanism and radical character has eleven equidistance points of laser goal. For different optical measurement systems

when distortion is detected in according to three steps

the compensation equation for goal in linear CCD in real-time measurement is fitted. Then the program on data collection and real-time manipulation of imaging position will be compiled to improve the precision of measurement system on real-time nicety measurement. The experiment results show that the installation can reduce error obviously from -0.026 4 mm to -0.002 9 mm in according to the compensation equation when the distance is 1 651.59 mm and the height is 400.007 mm

and raise the whole systematic detection precision from 0.36% to 0.04%.

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references

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