推扫式线阵TDI CCD扫描调制传递函数分析

杨永明, 李昕阳, 赵嘉鑫

杨永明, 李昕阳, 赵嘉鑫. 推扫式线阵TDI CCD扫描调制传递函数分析[J]. 应用光学, 2011, 32(5): 872-877.
引用本文: 杨永明, 李昕阳, 赵嘉鑫. 推扫式线阵TDI CCD扫描调制传递函数分析[J]. 应用光学, 2011, 32(5): 872-877.
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YANG Yong-ming, LI Xin-yang, ZHAO Jia-xin. Scanning modulation transfer function analysis of push-broom linear TDI CCD[J]. Journal of Applied Optics, 2011, 32(5): 872-877.
Citation: YANG Yong-ming, LI Xin-yang, ZHAO Jia-xin. Scanning modulation transfer function analysis of push-broom linear TDI CCD[J]. Journal of Applied Optics, 2011, 32(5): 872-877.
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推扫式线阵TDI CCD扫描调制传递函数分析

  • 中国科学院 长春光学精密机械与物理研究所,吉林 长春 130033

详细信息
    通讯作者:

    杨永明（1980-），男，吉林长春人，博士，助理研究员，主要从事航空相机成像控制技术研究工作。

  • 中图分类号: TN911.73;TP75

Scanning modulation transfer function analysis of push-broom linear TDI CCD

  • Changchun Institute of Optics,Fine Mechanics and Physics,CAS,Changchun 130033,China

摘要

    摘要
  • 摘要: 根据线阵TDI CCD离散采样的特点，以采样间距内成像调制度均值为基础，构建了推扫成像模式下线阵TDI CCD扫描方向的调制传递函数。该调制传递函数的数值分析表明：对于像元为10 m的线阵TDI CCD，行转移驱动时钟相数为4， 3或2时,Nyquist频率处调制传递函数值分别为0.363，0.333或0.255；行频误差为1%及3%时，不同积分级数下调制传递函数变化曲线表明，增大行频误差及增加积分级数将使调制传递函数值减小，图像分辨率降低。成像实验结果符合所构建调制传递函数的定量分析结论。
    Abstract: Scanning modulation transfer function (MTF) for linear time-delay integration (TDI) charge coupled device (CCD) using push-broom imaging mode was established. The MTF which took the discrete sampling characteristics of linear TDI CCD into account, was based on the imaging modulation mean within sampling interval. The numerical analysis of the proposed MTF indicated that the value of MTF at Nyquist frequency for linear TDI CCD with 10 m pixel size was 0.363, 0.333 and 0.255 respectively, when the number of row transfer phase clocks was 4, 3 and 2. When the row frequency error was 1% or 3%,the changes of MTF curves with different integration numbers implied that increasing the row frequency error and the integration number could decrease the value of MTF and reduce the image resolution. The results of imaging experiment agree with the quantity analysis of the proposed MTF.
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    ZHENG Lin, ZHONG Si-dong, HE Dui-yan. The modulation transfer function of charge-coupled devices［J］. Journal of Wuhan Technical University of Surveying and Mapping, 1996, 21(2): 176-182. (in Chinese with an English abstract)

    ［3］MAGNAN P, ESTRIBEAU M, ROLLAND G, et al. Theoretical evaluation of MTF and charge collection efficiency in CCD and CMOS image sensors［J］. SPIE, 2009, 7427: 23-34.

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    ［5］王凌, 徐之海, 冯华君, 等. 线阵推扫式CCD亚像元成像的列向动态调制传递函数［J］. 浙江大学学报：工学版, 2008, 42(2): 317-320.

    WANG Ling, XU Zhi-hai, FENG Hua-jun, et al. Transverse dynamic modulation transfer function of subpixel push-scanning imaging by linear CCD［J］. Journal of Zhejiang University:Engineering Science, 2008, 42(2): 317-320. (in Chinese with an English abstract)

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  • 刊出日期:  2011-09-14

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