Chinese Optics Letters, Volume. 14, Issue 11, 111101(2016)
Three-dimensional imaging lidar system based on high speed pseudorandom modulation and photon counting
Figures & Tables(13)
Fig. 3. Coordinate system transformation of three-dimensional imaging.
Fig. 4. Photoelectron sequence when (a) detector efficiency is taken into account, (b) detector efficiency and gate are both taken into account, and (c) detector efficiency, gate, and dead-time are taken into account. (d) The results of 50 simulations and the mean values of actual detector efficiency.
Fig. 5. Experiment system of testing the actual detector efficiency.
Fig. 8. Top view of the point-cloud of the three-dimensional imaging (on the left), and a google map of the same place (on the right).
Fig. 9. Front view of point-cloud of the three-dimensional imaging (on the left), and a photograph of the same place (on the right).
Table 1. Simulation Parameters of Actual Detector Efficiency
View tableView in ArticleTable 1. Simulation Parameters of Actual Detector Efficiency
Parameters Value Ideal detector efficiency 10% Laser modulation frequency 1 GHz Gate repetition frequency 1 GHz Gate open time 300 ps The number of signal “1” in original PN code 512 The number of photons of every signal “1” in original PN code 1 Dead-time 10 ns
Table 2. Parameters of Outdoor Ranging Test
View tableView in ArticleTable 2. Parameters of Outdoor Ranging Test
Parameters Value Target distance 859.5 m Wavelength 1550 nm Environmental conditions bright Pulse repetition frequency 10 kHz Limiting resolution 0.15 m Actual detector efficiency 2.26% Transmitter average power 260 mW Telescope aperture 50 mm Bandwidth of filter 10 nm PN code bit rate 1 Gb/s PN code length 1024
Table 3. Parameters of Outdoor Three-Dimensional Imaging
View tableView in ArticleTable 3. Parameters of Outdoor Three-Dimensional Imaging
Parameters Value Imaging range 0–1200 m Horizontal scan angle resolution 0.07875° Vertical scanning angle resolution 0.23625° Pixel dwell time 100 μs Total measurement time 30 min Range resolution 0.15 m
Table 4. SNR of Landmark Target
View tableView in ArticleTable 4. SNR of Landmark Target
Target Distance (m) SNR (dB) Ground 110 17.46 Building ① 477 17.98 Building ② 595 16.65 Building ③ 799 13.62 Building ④ 871 13.74 Building ⑤ 914 13.74 Building ⑥ 963 9.14 Building 1181 5.4
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Yufei Zhang, Yan He, Fang Yang, Yuan Luo, Weibiao Chen, "Three-dimensional imaging lidar system based on high speed pseudorandom modulation and photon counting," Chin. Opt. Lett. 14, 111101 (2016)
Paper Information
Category: Imaging Systems
Received: Mar. 31, 2016
Accepted: Sep. 9, 2016
Published Online: Aug. 2, 2018
The Author Email: Yan He (heyan@siom.ac.cn), Weibiao Chen (wbchen@mail.shcnc.ac.cn)
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