扫描镜稳定度对TDI CCD测量精度的影响

贺小军; 曲宏松; 张贵祥; 王金玲

doi:10.3788/CO.20140704.0665

扫描镜稳定度对TDI CCD测量精度的影响

doi: 10.3788/CO.20140704.0665

贺小军^1,2, ,,
曲宏松^1,2,
张贵祥^1,2,
王金玲¹

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.
小卫星技术国家地方联合工程研究中心, 吉林长春 130033

基金项目:

国家高技术研究发展计划（863计划）资助项目（No.2007AA12Z113）

详细信息

作者简介:
曲宏松（1980-），男，辽宁大连人，博士，硕士生导师，2003年于吉林大学获得学士学位，2008年于中国科学院长春光学精密机械与物理研究所获博士学位，主要从事CCD成像系统方面的研究。E-mail：quhongsong@yahoo.com.cn

通讯作者:
贺小军

中图分类号: TP701
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出版历程
- 收稿日期: 2014-02-25
- 修回日期: 2014-05-12
- 刊出日期: 2014-07-25

Impact of scan mirror stability on TDI CCD system measure accuracy

1.
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
2.
National &Local United Engineering Research Center of Small Satellite Technology, Changchun 130033, China

摘要

摘要: 利用TDI CCD成像数值仿真模型，研究了TDI CCD测量系统的测角精度随扫描镜速度稳定度的变化规律。首先根据TDI CCD推扫成像的物理过程，建立了数值仿真模型，设计了从光学像和扫描镜稳定度到数字图像的仿真链路；然后利用图像重心计算方法求取图像中心坐标并得到目标点的角位置坐标；通过蒙特卡诺法进行海量打靶试验，对结果进行统计得到扫描镜各稳定度水平上的测量精度值；最后将某工程样机的扫描镜速度稳定度带入仿真模型，仿真结果表明：测试误差增大5.67 rad，达到了像元角分辨率的1/4。在光学测量系统的系统设计时，需要考虑像元分辨率及扫描镜稳定度的综合影响，选用合适的扫描镜稳定度要求，使测量角分辨率满足用户需求。
- 光学测量 /
- TDI CCD /
- 成像仿真 /
- 扫描镜
Abstract: Numerical simulation model of TDI CCD imaging is used to study the relationship between the speed stability of the scanning mirror and angle measurement accuracy in a TDI CCD measurement system. First, based on the physical process of TDI CCD push-broom imaging, a numerical simulation model is established to describe the whole process from optical image and scan mirror stability to digital images, and then gravity centre of image is calculated and the target angular coordinate is got; Monte Carlo method is used to complete a simulation experiment, and the statistical results could describe the relation between stability of the scanning mirror and measure accuracy. In the end, the speed stability of an engineering scanning mirror is substituted into the simulation module, and the simulation results show that the error increases by 5.67 rad, reached 1/4 of pixel angular resolution. So in high-precision measurement, the comprehensive influence of the pixel angular resolution and the speed stability of the speed stability need to be considered. The appropriate speed stability of the scanning mirror showed be chosen to meet the requirement of pixel angular resolution.
- optic measure /
- TDI CCD /
- imaging simulation /
- scanning mirror

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参考文献(1)

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