卷帘快门sCMOS相机对空间碎片观测的影响研究

张晓祥; 赵金宇; 贾建禄; 吴庆林; 鹿瑶; 高若城

doi:10.3788/OPE.20182606.1441

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卷帘快门sCMOS相机对空间碎片观测的影响研究

微纳技术与精密机械 | 更新时间：2020-07-05

- 卷帘快门sCMOS相机对空间碎片观测的影响研究
- Study on the effect of rolling shutter sCMOS camera on space debris observation
- 光学精密工程 2018年26卷第6期页码：1441-1449
- 作者机构：
  
  1.中国科学院紫金山天文台, 江苏南京 210008
  2.中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
  3.中国科学院空间目标与碎片观测重点实验室, 江苏南京 210008
  4.中国科学院大学北京 100049
  5.北京师范大学附属实验中学, 北京 100032
- 作者简介：
  
  [ "张晓祥(1970-), 男, 江苏徐州人, 博士, 研究员, 博士生导师, 1995年于南京大学获得学士学位, 2001年于中国科学院紫金山天文台获得硕士学位, 2007年于中国科学院紫金山天文台获得博士学位, 主要从事空间碎片观测、图像处理、天文导航等方面的研究。E-mail:csss@pmo.ac.cn" ]
  [ "赵金宇(1977-), 男, 内蒙赤峰人, 博士生导师, 研究员, 2006年于中国科学院长春光学精密机械与物理研究所获得博士学位, 主要从事数字图像信号处理软硬件技术, 图像跟踪与目标识别, 图像恢复等方面的研究。E-mail:zhaojy@ciomp.ac.cn" ]
- 基金信息：
  
  国家自然科学基金资助项目(11773082);国家自然科学基金资助项目(11703024)
- DOI：10.3788/OPE.20182606.1441
  中图分类号： TP394.1;TH691.9
- 收稿日期：2017-10-11，
  
  录用日期：2017-10-30，
  
  纸质出版日期：2018-06-25
- 稿件说明：
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张晓祥, 赵金宇, 贾建禄, 等. 卷帘快门sCMOS相机对空间碎片观测的影响研究[J]. 光学精密工程, 2018,26(6):1441-1449.

Xiao-xiang ZHANG, Jin-yu ZHAO, Jian-lu JIA, et al. Study on the effect of rolling shutter sCMOS camera on space debris observation[J]. Optics and precision engineering, 2018, 26(6): 1441-1449.
张晓祥, 赵金宇, 贾建禄, 等. 卷帘快门sCMOS相机对空间碎片观测的影响研究[J]. 光学精密工程, 2018,26(6):1441-1449. DOI： 10.3788/OPE.20182606.1441.

Xiao-xiang ZHANG, Jin-yu ZHAO, Jian-lu JIA, et al. Study on the effect of rolling shutter sCMOS camera on space debris observation[J]. Optics and precision engineering, 2018, 26(6): 1441-1449. DOI： 10.3788/OPE.20182606.1441.

摘要

同每个像素曝光开始及结束时间相同的传统科学级CCD相机相比，近年来出现的卷帘快门（rolling shutter）sCMOS相机工作时每个像素的曝光开始及结束时间不同，曝光时间相同，因此需要评估sCMOS相机像素之间曝光开始及结束时间不同对空间碎片测量精度的影响。首先测试了卷帘快门sCMOS相机的工作时序和最大延迟时间，并得出曝光不同步的改正公式，再以激光卫星为目标，测试了两种典型观测模式下空间碎片的天文定位精度，并对应用曝光不同步改正前后结果进行对比。测试结果表明sCMOS相机卷帘快门的工作时序与理论一致，边缘曝光延迟最大10 ms；实测表明恒星位置内符合精度优于2 arcsec，目标天文定位精度优于3 arcsec。sCMOS相机能够用于空间碎片观测，能够实现较高的位置测量精度。

Abstract

Compared to traditional scientific CCD cameras in which the exposure of each pixel starts and ends synchronously

rolling shutter sCMOS cameras have recently emerged and operate based on an asynchronous start and end time

but with the same exposure period. For space debris observation

it is necessary to evaluate the effect on the measurement accuracy due to the asynchronous exposure among the sCOMS pixels. Firstly

the working sequence and max delay of certain sCMOS cameras were tested

and a correction formula was obtained. Subsequently

several laser satellites were selected as observation targets to test the astronomic positioning accuracy of space debris under two typical observation modes. The differences before and after exposure with non-synchronization correction were then compared. The experimental results indicate that the working sequence of a rolling shutter sCMOS camera is consistent with a theoretical device

and the maximum delay in the border row is 10 ms. The results also indicate that the internal accord accuracy of the staller position is better than 2 arcsec

and better than 3 arcsec for the precision of object astronomic positioning. Rolling shutter sCMOS cameras can be used for space debris observation with high-precision position measurements.

关键词

Keywords

references

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