Optical System and Detection Range Analysis of Synthetic Aperture Ladar

Li Daojing; Hu Xuan

doi:10.12000/JR18017

Volume 7 Issue 2

May 2018

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Article Navigation > Journal of Radars > 2018 > 7(2): 263-274

Zhang Ran, Feng Dejun, Xu Letao. Design and Polarization Characteristics Analysis of Dihedral Based on Salisbury Screen[J]. Journal of Radars, 2016, 5(6): 658-665. doi: 10.12000/JR16055

Citation:

Li Daojing, Hu Xuan. Optical System and Detection Range Analysis of Synthetic Aperture Ladar[J]. Journal of Radars, 2018, 7(2): 263-274. doi: 10.12000/JR18017

Zhang Ran, Feng Dejun, Xu Letao. Design and Polarization Characteristics Analysis of Dihedral Based on Salisbury Screen[J]. Journal of Radars, 2016, 5(6): 658-665. doi: 10.12000/JR16055

Citation:

Li Daojing, Hu Xuan. Optical System and Detection Range Analysis of Synthetic Aperture Ladar[J]. Journal of Radars, 2018, 7(2): 263-274. doi: 10.12000/JR18017

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Optical System and Detection Range Analysis of Synthetic Aperture Ladar

DOI: 10.12000/JR18017

Li Daojing^{1
,
,},
Hu Xuan^1,2

①.
Key Laboratory of Science and Technology on Microwave Imaging, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
②.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: The National Natural Science Foundation of China (61771449)

Received Date: 2018-02-10
Rev Recd Date: 2018-03-26
Publish Date: 2018-04-28

Abstract

Abstract

Optical system and detection range of Synthetic Aperture Ladar (SAL) are analyzed. According to the imaging characteristics of SAL, the concept that SAL uses non-imaging diffractive optical system are proposed, meanwhile, the phased array model is introduced to analyze its performance. In the condition of using binary optical element on the feeder and primary mirror, the phaser parameters and beam pattern are presented using simulation. The signal of 2° view field is introduced into fiber with the 300 mm aperture telescope and compressed optical path. The radar detection range equation of SAL is introduced, coherent detection and signal accumulation gain are analyzed, the conclusion is SAL has good ability of detecting weak signal. Aiming at application requirement, system parameters and working modes of airborne SAL are given with high resolution and long detection range. With 5 cm resolution, the airborne SAL can achieve 5 km detection range with 1.5 km swath in strip-map imaging mode and 10 km detection range with 1 km swath in sliding spotlight imaging mode.
- Synthetic Aperture Ladar (SAL),
- Ladar,
- Synthetic aperture imaging,
- Diffractive optical system,
- Radar equation,
- Phased array antenna

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References(23)

References

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