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Volume 45 Issue 4
Apr.  2023
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WANG Chuyue, YANG Lifeng, HE Daogang. Modeling and Verification of Ground Point Source for Mid-Wave Infrared Detection[J]. Infrared Technology , 2023, 45(4): 357-363.
Citation: WANG Chuyue, YANG Lifeng, HE Daogang. Modeling and Verification of Ground Point Source for Mid-Wave Infrared Detection[J]. Infrared Technology , 2023, 45(4): 357-363.
shu

Modeling and Verification of Ground Point Source for Mid-Wave Infrared Detection

  • 1.

    Shanghai Institute of Technical Physics of the Chinese Academy of Sciences, Shanghai 200083, China

  • 2.

    University of Chinese Academy of Sciences, Beijing 100049, China

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  • Received Date: March 25, 2021
  • Revised Date: June 30, 2021
    Graphical Abstract
    • Abstract
  • The detection of anomalous heat source point targets in a wide range of infrared systems requires a balance between the pixel resolution and temperature sensitivity. Given that the scale of the detector is stable, the existing space-borne infrared payloads have insufficient sensitivity when the amplitude is large and small amplitude when the spatial resolution is high. In response to these problems, in this study, we propose a preliminary plan for detecting heat sources at abnormal points in a large field of view using a time-delay integration (TDI) algorithm to process images. Under certain conditions, the temperature sensitivity requirements for detection can be satisfied and a theoretical width of 217 km × 122 km can be achieved. A set of high-sensitivity infrared imaging experimental systems was built, and testing and simulation-based detection experiments were conducted. The results show that the sensitivity performance of this scheme is approximately 37 mK when a width of 202 km× 114 km is realized, which fulfills the requirements for detecting a large-scale abnormal point heat source. Considering the solar reflectance of the target and background, a pixel resolution of 200 m is used in practical applications, which corresponds to a width of 128 km×102 km.
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    • References (13)
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