Infrared and Laser Engineering, Volume. 51, Issue 3, 20210250(2022)
High precision ranging lidar based on pseudorandom code modulation
Figures & Tables(13)
Fig. 3. Relationship between angle with the reflected light of the sun and SNR
Fig. 7. Relationship between range detection accuracy and echo signal to noise ratio
Fig. 8. Range detection results （The cumulative number of times is 50）
Fig. 9. Relationship between cumulative times and distance accuracy
Fig. 10. Relationship between accumulated times of correlation value and distance accuracy
Fig. 11. Configuration and internal structure of ranging lidar system
Table 1. Main specifications of ranging lidar
View tableView in ArticleTable 1. Main specifications of ranging lidar
No. Parameter Value 1 Ranging range/km 20 2 Ranging accuracy/m 0.1 3 Data update rate/Hz 10 4 Target size 2 m×2 m×2 m 5 Target reflectivity 0.3 6 Wavelength/nm 1 550 7 Weight/kg 10 8 Volume/L 30
Table 2. Main specifications of long distance space ranging lidar
View tableView in ArticleTable 2. Main specifications of long distance space ranging lidar
Composition Item Specification Laser and transmitting optical system Wavelength/nm 1 550 Modulation frequency/MHz 100 Pulse width/ns 10 Laser pulse energy/nJ 20 Numerical aperture 0.09 Divergence angle/mrad 0.1 Mode-field diameter/mm 23 Receiving optical system Receiver aperture/mm 100 Optical efficiency 50% Optical band width/nm 5 Focal length/mm 354 Photon counting Detection probability ≥18% Photon counting rate/MHz 200 Dark count rate/kHz 20 Range resolution/m 3 Cumulative frequency 214−1
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Xu Han, Zhi Li, Yaojun Wu, Zhimin Zhang, Jianbin Huang, Longfei Huang. High precision ranging lidar based on pseudorandom code modulation[J]. Infrared and Laser Engineering, 2022, 51(3): 20210250
Paper Information
Category: Lasers & Laser optics
Received: Apr. 19, 2021
Accepted: --
Published Online: Apr. 8, 2022
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