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Analysis of the effect of lens shutter on image motion in aerial camera

YU Chun-feng CHEN Zhi-chao JIA Ping WANG Nai-xiang HOU Han

于春风, 陈志超, 贾平, 王乃详, 候汉. 航空相机镜间快门对像移的影响分析[J]. 中国光学, 2020, 13(3): 616-626. doi: 10.3788/CO.2019-0127
引用本文: 于春风, 陈志超, 贾平, 王乃详, 候汉. 航空相机镜间快门对像移的影响分析[J]. 中国光学, 2020, 13(3): 616-626. doi: 10.3788/CO.2019-0127
YU Chun-feng, CHEN Zhi-chao, JIA Ping, WANG Nai-xiang, HOU Han. Analysis of the effect of lens shutter on image motion in aerial camera[J]. Chinese Optics, 2020, 13(3): 616-626. doi: 10.3788/CO.2019-0127
Citation: YU Chun-feng, CHEN Zhi-chao, JIA Ping, WANG Nai-xiang, HOU Han. Analysis of the effect of lens shutter on image motion in aerial camera[J]. Chinese Optics, 2020, 13(3): 616-626. doi: 10.3788/CO.2019-0127

航空相机镜间快门对像移的影响分析

doi: 10.3788/CO.2019-0127
详细信息
  • 中图分类号: TP73

Analysis of the effect of lens shutter on image motion in aerial camera

Funds: Supported by National Key R&D Program Funding Projects(No. 2016YFC0803000)
More Information
    Author Bio:

    YU Chun-feng (1979—), was born in Changchun, Jilin province. In 2013, he graduated from University of Chinese Academy of Sciences. Now he is working as an associate professor at Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences. His research interests are aerial imaging and measurement technology. E-mail: hou791016@163.com

    CHEN Zhi-chao (1979-), was born in Tieling, Liaoning province, Doctor, associate professor, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences. In 2016,graduated from University of Chinese Academy of Sciences, He research interests are automatic focusing technology of aerial camera. E-mail: 17522332@qq.com

    JIA Ping (1964-), Doctor, professor, Ph.D.supervisor, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences. He research interests are aerial imaging and measuring instrument technology. E-mail: jiap@ciomp,ac,cn

    Corresponding author: hou791016@163.com
  • 摘要: 为了提高航空遥感相机的摄影分辨率,获得高分辨率的航空图像,除了采用具有高传递函数的光学系统和高质量成像介质外,还要正确控制快门的曝光时间,以保证探测器能够获得合适的像移量。本文基于一种航空测绘相机镜间快门的结构形式及工作原理,以笛卡尔理论为基础,通过坐标变换方法,建立地面目标和影像之间的矩阵关系,从而确定快门曝光时间和像移量的关系,接着,结合相机速高比、像元尺寸等参数,对像移量及像移残差进行分析。根据相机的不同安装方式,以像移残差为1/3像元尺寸为标准,判定成像系统是否加入像移补偿机构,为相机设计提供理论依据。通过静态测试及飞行试验对分析进行验证。试验结果表明,相机分辨力达到36.8 lp/mm,航拍图像良好,满足指标要求。
  • Figure  1.  Photograph of shutter

    Figure  2.  Schematic diagram of blade scanning aperture

    Figure  3.  Forward image shift in camera mounted vertically

    Figure  4.  Image motion vector in camera mounted vertically

    Figure  5.  The relationship between exposure time and image motion value at difference speed-height ratios

    Figure  6.  Image motion in camera mounted tilting forward

    Figure  7.  Schematic and histogram of image motion vector in camera lean mounted forward

    Figure  8.  Schematic and histogram of forward residual image motion in camera mounted leaning forward

    Figure  9.  The relationship between exposure time and image shift at difference V/H and lean angle forward

    Figure  10.  Diagram of coordinate transformation relation

    Figure  11.  The schematic and histogram of image shift vectors caused by aircraft attitude changes

    Figure  12.  Schematic diagram of experimental device

    Figure  13.  Measuring setup

    Figure  14.  Photo of the dynamic target

    Figure  15.  Radial drone image in flight

    Table  1.   Imaging experiment results

    Measurement timesVisual resolution(lp/mm)
    136.5
    236.5
    337.2
    436.5
    537.2
    Average36.8
    下载: 导出CSV
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