Research on methods of enlarging field of view of the synthetic aperture lidar

Yiyi Zhao; Bin Xue; Xiaolong Ma; Yinghong He; Xingtao Yan; Juan Lv; Meng Xiang

doi:10.1117/12.2504949

11 January 2019 Research on methods of enlarging field of view of the synthetic aperture lidar

Yiyi Zhao, Bin Xue, Xiaolong Ma, Yinghong He, Xingtao Yan, Juan Lv, Meng Xiang

Proceedings Volume 10837, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 108370D (2019) https://doi.org/10.1117/12.2504949
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Synthetic aperture lidar is a new ultra-high resolution optical imaging instrument, but its reception field is very narrow which is subject to the "antenna theory". In this paper, the antenna efficiency theory is used to explain the antenna theory and the method of enlarging the field of view of the synthetic aperture laser radar. Then the increase range of the field angle of the three methods is deduced by heterodyne efficiency simulation. The simulation results show that the focal plane heterodyne detection optical path of the wide-beam local oscillator beam focal plane has the ability to improve the heterodyne efficiency of the edge field of view by reducing the heterodyne efficiency of the central field of view. The focal plane heterodyne detection optical path of the array detector requires the detector whose pixel size less than 3 times Airy spot radius covers the whole field of view, which can increase the maximum 1.83N times compared to the antenna theory. The effective field of the pupil plane heterodyne detection optical path of the array detector has nothing to do with the magnification of the telescope, the pupil diameter, the size of the detector, etc., which can be increased by N times as compared with the antenna theory.

Citation Download Citation

Yiyi Zhao, Bin Xue, Xiaolong Ma, Yinghong He, Xingtao Yan, Juan Lv, and Meng Xiang "Research on methods of enlarging field of view of the synthetic aperture lidar", Proc. SPIE 10837, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 108370D (11 January 2019); https://doi.org/10.1117/12.2504949

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KEYWORDS

Heterodyning

Sensors

Antennas

Detector arrays

Signal detection

Staring arrays

LIDAR

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