Array Synthetic Aperture Ladar with High Spatial Resolution Technology

被引：0
作者：
Wang B. [1 ,2 ]
Zhao J. [1 ]
Li W. [1 ,2 ]
Shi R. [1 ,2 ]
Xiang M. [1 ,2 ]
Zhou Y. [3 ]
Jia J. [4 ]
机构：
[1] Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing
[2] University of Chinese Academy of Sciences, Beijing
[3] Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai
[4] Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai
来源：
Journal of Radars | 2022年 / 11卷 / 06期
关键词：
Array; High resolution; Synthetic Aperture Ladar (SAL); Wide swath;
D O I：
10.12000/JR22204
中图分类号：
学科分类号：
摘要：
By extending synthetic aperture technology from the microwave band to the laser wavelength, Synthetic Aperture Ladar (SAL) has long-distance imaging and extremely high spatial resolution independent of the target distance. Presently, the small field of view is the key constraint in SAL ground observation because of the laser diffraction limitation. In this paper, an array SAL technology is proposed. With high-power array transmission, array-balanced detection, and pulse-wise dynamic internal calibration, a multichannel coherent laser transceiver is realized. Meanwhile, the field of view has multiplied. The results of turntable experiments show that the imaging resolution is better than 3 cm (distance) × 1 cm (azimuth). This technology provides a scientific and technical approach to SAL with wider swath imaging in ground observation. © 2022 Institute of Electronics Chinese Academy of Sciences. All rights reserved.
引用
收藏
页码：1110 / 1118
页数：8
相关论文
共 14 条
  • [1] LEWIS T S, HUTCHINS H S., A synthetic aperture at optical frequencies[J], Proceedings of the IEEE, 58, 4, pp. 587-588, (1970)
  • [2] MARCUS S, COLELLA B D, GREEN T J., Solid-state laser synthetic aperture radar[J], Applied Optics, 33, 6, pp. 960-964, (1994)
  • [3] GREEN T J, MARCUS S, COLELLA B D., Synthetic-aperture-radar imaging with a solid-state laser[J], Applied Optics, 34, 30, pp. 6941-6949, (1995)
  • [4] BASHKANSKY M, LUCKE R L, FUNK E, Et al., Two-dimensional synthetic aperture imaging in the optical domain[J], Optics Letters, 27, 22, pp. 1983-1985, (2002)
  • [5] BECK S M, BUCK J R, BUELL W F, Et al., Synthetic-aperture imaging laser radar: Laboratory demonstration and signal processing[J], Applied Optics, 44, 35, pp. 7621-7629, (2005)
  • [6] KRAUSE B W, BUCK J, RYAN C, Et al., Synthetic aperture Ladar flight demonstration[C], Laser Science to Photonic Applications, pp. 1-2, (2011)
  • [7] GUO Liang, Study on experiment and algorithm of synthetic aperture imaging Lidar, pp. 43-62, (2009)
  • [8] LIU Liren, ZHOU Yu, ZHI Ya'nan, Et al., A large-aperture synthetic aperture imaging Ladar demonstrator and its verification in laboratory space, Acta Optica Sinica, 31, 9, (2011)
  • [9] WU Jin, YANG Zhaosheng, ZHAO Zhilong, Et al., Synthetic aperture Ladar imaging with one-way far-field diffraction[J], Journal of Infrared and Millimeter Waves, 32, 6, pp. 514-518, (2013)
  • [10] LI Guangzuo, WANG Ning, WANG Ran, Et al., Imaging method for airborne SAL data[J], Electronics Letters, 53, 5, pp. 351-353, (2017)
12