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Acta Optica Sinica, Volume. 40, Issue 5, 0528002(2020)

An On-Board Autofocusing Method for Scanning Agile Remote Sensing Satellite

Wei Tan1,2、*, Wenwen Qi1,2, Hongyan He1,2, and Kun Xing1,2
Author Affiliations
  • 1Beijing Institute of Space Mechanics and Electronics, Beijing 100094, China
  • 2Beijing Key Laboratory of Advanced Optical Remote Sensing Technology, Beijing 100094, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (11)
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    References (21)
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    Figures & Tables(11)
    Imaging scheme of point light source for lens optical system

    Fig. 1. Imaging scheme of point light source for lens optical system

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    Imaging scheme of satellite during autofocusing period

    Fig. 2. Imaging scheme of satellite during autofocusing period

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    Scheme of simulated defocusing images under Worldview-1 gaze imaging mode. (a)-(f) Images with different focal planes

    Fig. 3. Scheme of simulated defocusing images under Worldview-1 gaze imaging mode. (a)-(f) Images with different focal planes

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    Comparison results of four refocusing evaluation functions

    Fig. 4. Comparison results of four refocusing evaluation functions

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    Schematic of simulated imaging experiment in laboratory

    Fig. 5. Schematic of simulated imaging experiment in laboratory

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    Examples of close-range imaging experiment. Target position No.: (a) 6; (b) 4; (c) 2; (d) 7; (e) 9; (f) 11

    Fig. 6. Examples of close-range imaging experiment. Target position No.: (a) 6; (b) 4; (c) 2; (d) 7; (e) 9; (f) 11

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    Comparison results of four refocusing evaluation functions

    Fig. 7. Comparison results of four refocusing evaluation functions

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    Image example of simulation experiment. Image No.: (a) 9; (b) 11; (c) 13; (d) 14; (e) 15; (f) 16

    Fig. 8. Image example of simulation experiment. Image No.: (a) 9; (b) 11; (c) 13; (d) 14; (e) 15; (f) 16

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    Comparison results of four refocusing evaluation functions

    Fig. 9. Comparison results of four refocusing evaluation functions

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    • Table 1. Relation between target position No. and defocusing amount

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      Table 1. Relation between target position No. and defocusing amount

      Target position No.0123456789101112131415
      Defocusing degree-5.0-4.0-3.0-2.0-1.0-0.500.51.02.03.04.05.06.07.08.0

    • Table 2. Relation among image No. defocusing degree and image motion amount

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      Table 2. Relation among image No. defocusing degree and image motion amount

      Image No.12345678
      Defocusing degree /DOF-4.02-3.04-2.04-1.54-1.04-0.84-0.64-0.32
      Image motion amount /pixel2622201816141210
      Image No.910111213141516
      Defocusing degree /DOF00.30.60.81.01.52.03.0
      Image motion amount /pixel042-2-424-6-8
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    Wei Tan, Wenwen Qi, Hongyan He, Kun Xing. An On-Board Autofocusing Method for Scanning Agile Remote Sensing Satellite[J]. Acta Optica Sinica, 2020, 40(5): 0528002

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    Paper Information

    Category: Remote Sensing and Sensors

    Received: Oct. 9, 2019

    Accepted: Nov. 27, 2019

    Published Online: Mar. 10, 2020

    The Author Email: Wei Tan (blacktanphay@126.com)

    DOI:10.3788/AOS202040.0528002

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology