Gaofeng Qiu, Kan Wu, Xianyi Cao, Minglu Cai, Jianping Chen. Two-Dimensional Fast Beam Scanning Lidar System Based on FPGA Control[J]. Acta Optica Sinica, 2021, 41(11): 1101001
- Acta Optica Sinica
- Vol. 41, Issue 11, 1101001 (2021)
Fig. 1. Principle of lens assisted beam scanning
Fig. 2. Lens group and beam deflection. (a) Schematic of lens group; (b) beam deflection at different off-axis distances
Fig. 3. Setup and measurement of the beam scanning. (a) Setup of the lens assisted beam scanning; (b) measured phase shift versus different electrical voltage; (c) measured switching waveform; (d) output red spots for illustration purposes
Fig. 4. Setup of the lidar system
Fig. 5. Typical output waveform of the photodetector
Fig. 6. Setup of the electronic control system
Fig. 7. Waveform of PWM and filter voltage
Fig. 8. Rise time of voltage switching
Fig. 9. Setup of the four targets scanning experiment
Fig. 10. Returning pulses at four targets with different angles and distances
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Table 1. Comparison of optical and electrical complexity between OPA and our system (lens assisted beam scanning)
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