Design of temperature adaptability for video processing in high-resolution remote sensing cameras

QU Li-xin

doi:10.3788/OPE.20111911.2800

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Design of temperature adaptability for video processing in high-resolution remote sensing cameras

Article | 更新时间：2020-08-12

- Design of temperature adaptability for video processing in high-resolution remote sensing cameras
- Optics and Precision Engineering Vol. 19, Issue 11, Pages: 2800-2804(2011)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20111911.2800
  CLC： V443.5
- Received：01 March 2011，
  
  Revised：02 April 2011，
  
  Published Online：25 November 2011，
  
  Published：25 November 2011
- 稿件说明：
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曲利新. 高分辨力遥感相机视频处理的温度适应性设计[J]. 光学精密工程, 2011,19(11): 2800-2804

QU Li-xin. Design of temperature adaptability for video processing in high-resolution remote sensing cameras[J]. Editorial Office of Optics and Precision Engineering, 2011,19(11): 2800-2804
曲利新. 高分辨力遥感相机视频处理的温度适应性设计[J]. 光学精密工程, 2011,19(11): 2800-2804 DOI： 10.3788/OPE.20111911.2800.

QU Li-xin. Design of temperature adaptability for video processing in high-resolution remote sensing cameras[J]. Editorial Office of Optics and Precision Engineering, 2011,19(11): 2800-2804 DOI： 10.3788/OPE.20111911.2800.

摘要

对遥感相机成像电子学系统进行了温度适应性设计

以使其在温度大范围变化时或电路存在局部温差时均能实现高质量成像。分析了成像链路中的温度延时因素

提出了温度适应性设计方案和相关双采样(CDS)位置的初始精密对准方法

并进行了实验验证。该方法将CCD驱动器的输出经分压整形处理后作为双采样信号的时序基准

从而使双采样信号具备自适应跟踪能力;利用RC电路低通滤波特性对双采样初始位置进行精密对准

最后

在-35~75 ℃对改进后的遥感相机成像电子学系统进行了高低温实验。结果表明:双采样初始位置的延时调节精度达到了0.15 ns;在实验温度范围内

双采样偏离理想位置的延时最大值仅为0.72 ns

相机成像质量达到指标要求

满足空间应用需要。

Abstract

To obtain high quality images for remote sensing cameras in a wider temperature change or in the temperature diversity caused by different circuit parts

an adaptive method for imaging electronics was proposed. The time-delay factors of temperature in the imaging system was analyzed

and design methods for temperature adaptability and the initial alignment of Corrlated Double Sampling(CDS) positions were given. Several experiments were performed to validate the feasibility of this method. By proposed method

the output of CCD driver was divided and was taken as a benchmark for the CDS signals

so that CDS signals can be used to track the driving signal adaptively. Then

initial positions of CDS were precisely aligned by using the lowpass filtering of a RC net. Finally

a temperature experiment by proposed compensating method was carried out for the imaging system of remote camera in -35~75 ℃. Results indicate that the position precision of CDS signals after adjusting is up to 0.2 ns. In the experimental temperature range

the maximal deviation of the CDS signals is only 0.72 ns as comparing with that of ideal one

which satisfies the indicators of image quality and the requirements of space application.

关键词

Keywords

references

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