Far-field outdoor experimental demonstration of down-looking synthetic aperture ladar

Guangyuan Li; Zhiyong Lu; Yu Zhou; Jianfeng Sun; Qian Xu; Chenzhe Lao; Hongyu He; Guo Zhang; Liren Liu

doi:doi:10.3788/COL201715.082801

Chinese Optics Letters, 2017, 15 (8): 082801, Published Online: Jul. 20, 2018

Far-field outdoor experimental demonstration of down-looking synthetic aperture ladar Download： 799次

Guangyuan Li ^1,2Zhiyong Lu ¹Yu Zhou ¹Jianfeng Sun ^1,*Qian Xu ¹Chenzhe Lao ^1,2Hongyu He ^1,2Guo Zhang ^1,2Liren Liu ¹

Author Affiliations

¹ Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

² University of Chinese Academy of Sciences, Beijing 100049, China

Figures & Tables

Fig. 4. Simulation results: (a) compressed image in the orthogonal direction and (b) the imaging result.

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Fig. 5. Optical corner cube target and imaging result of down-looking SAIL over 6 km: (a) the optical corner cubes and (b) the imaging result.

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Fig. 6. Compressed image in the orthogonal direction over 6 km: (a) without alignment and (b) with alignment.

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Table1. System Parameters of Down-Looking SAIL

Parameters	Values
Wavelength $λ$	1030 nm
Vibrant angle	$\pm 7 °$
Beam diameter	$4 m \times 4 m$
Vibrant frequency	760 Hz
Focus length of launch/receive lens	1.2 m
Imaging distance	6800 m
The rotation speed of the rotary table	$0.1 ° / s$
Modulation length	5 mm
Sampled frequency in orthogonal direction	31.25 MHz
Sampled frequency in azimuthal direction	1520 Hz
Cylindrical lens focal length	60 and $- 60 mm$
$Range \times Azimuthal$ resolutions	$28.8 mm \times 21.9 mm$
Laser power	30 W
Sampling duty cycle	58.91%

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Guangyuan Li, Zhiyong Lu, Yu Zhou, Jianfeng Sun, Qian Xu, Chenzhe Lao, Hongyu He, Guo Zhang, Liren Liu. Far-field outdoor experimental demonstration of down-looking synthetic aperture ladar[J]. Chinese Optics Letters, 2017, 15(8): 082801.

Far-field outdoor experimental demonstration of down-looking synthetic aperture ladar Download： 799次

Fig. 1. Experimental structure for down-looking SAIL.

Fig. 2. Outdoor experimental photo of down-looking SAIL.

Fig. 3. Errors of the phase modulation module: side-to-side vibrant angle.

Fig. 4. Simulation results: (a) compressed image in the orthogonal direction and (b) the imaging result.

Fig. 5. Optical corner cube target and imaging result of down-looking SAIL over 6 km: (a) the optical corner cubes and (b) the imaging result.

Fig. 6. Compressed image in the orthogonal direction over 6 km: (a) without alignment and (b) with alignment.

Table1. System Parameters of Down-Looking SAIL

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Far-field outdoor experimental demonstration of down-looking synthetic aperture ladar Download： 799次

Fig. 1. Experimental structure for down-looking SAIL.

Fig. 2. Outdoor experimental photo of down-looking SAIL.

Fig. 3. Errors of the phase modulation module: side-to-side vibrant angle.

Fig. 4. Simulation results: (a) compressed image in the orthogonal direction and (b) the imaging result.

Fig. 5. Optical corner cube target and imaging result of down-looking SAIL over 6 km: (a) the optical corner cubes and (b) the imaging result.

Fig. 6. Compressed image in the orthogonal direction over 6 km: (a) without alignment and (b) with alignment.

Table1. System Parameters of Down-Looking SAIL

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