Optics and Precision Engineering, Volume. 30, Issue 2, 191(2022)

Design of auto-exposure imaging circuit under complex illuminance of Mars in Tianwen-1 high-resolution camera

Jingtao HUANG*... Xiaodong WANG, Zhenya SUN, Dali ZHOU and Pengji ZHOU |Show fewer author(s)
Author Affiliations
  • Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun130033, China
  • show less
    Figures & Tables(14)
    Block diagram of imaging circuit
    TDI CCD real figure
    Framework of TID CCD
    Pre-magnification circuit of the CCD
    Auto-exposure test in laboratory
    Image before and after auto-exposure
    MTF test image before auto-exposure
    MTF test image after auto-exposure
    Actual scene image before auto-exposure
    Actual scene image after auto-exposure
    • Table 1. Main technical indicators of TDI CCD

      View table
      View in Article

      Table 1. Main technical indicators of TDI CCD

      波段像元尺寸/μm像元数量

      最大像元读出

      速率/MHz

      最大行转移

      速率/KHz

      光谱谱段/nm

      最大积分

      级数

      抗辐照

      指标

      全色8.75×8.756144≥25≥26450~90096级
      B117.5×17.53072≥25≥14450~52064级
      B217.5×17.53072≥25≥14520~60048级>30 Krad(Si)
      B317.5×17.53072≥25≥14630~69032级
      B417.5×17.53072≥25≥14760~90032级
    • Table 2. Main technical indicators of CMOS

      View table
      View in Article

      Table 2. Main technical indicators of CMOS

      参数参考值
      像元尺寸11 μm×11 μm
      有效像元数2 048(H)×2 048(V)
      快门类型电子卷帘快门
      主时钟速率20 MHz~30 MHz
      帧频24 fps@HDR,48 fps@STD
      数据率2.4 Gbit/s at 25 MHz
      满阱电荷120 ke
      暗噪声1.47e
      动态范围>96 dB(HDR模式)
      功耗<600 mW
    • Table 3. MTF corresponding to each integral series

      View table
      View in Article

      Table 3. MTF corresponding to each integral series

      轨道高度/km行频/Hz增益级数MTF
      2658 078.477180.093
      160.1
      320.097
      480.104
      640.1
      960.092
    • Table 4. MTF value comparison before and after adaptive automatic exposure

      View table
      View in Article

      Table 4. MTF value comparison before and after adaptive automatic exposure

      成像模式积分级数增益行频/HzMTF
      默认成像参数818 078.4770.092
      自适应调光4818 078.4770.105
    Tools

    Get Citation

    Copy Citation Text

    Jingtao HUANG, Xiaodong WANG, Zhenya SUN, Dali ZHOU, Pengji ZHOU. Design of auto-exposure imaging circuit under complex illuminance of Mars in Tianwen-1 high-resolution camera[J]. Optics and Precision Engineering, 2022, 30(2): 191

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Received: Nov. 12, 2020

    Accepted: --

    Published Online: Mar. 4, 2022

    The Author Email: HUANG Jingtao (3511643@163.com)

    DOI:10.37188/OPE.20223002.0191

    Topics