Infrared and Laser Engineering, Volume. 50, Issue 3, 20210033(2021)
Recent advancements of the lidar technique based on the Scheimpflug imaging principle (Invited)
Fig. 1. Optical layout of the Scheimpflug imaging principle.
is the focal length of the receiving telescope
沙氏成像原理示意图。
Fig. 2. (a) Relationships between the pixel and the measurement distance with different optical configurations; (b) Relationship between the range resolution and the measurement distance. System parameters:
Fig. 3. (a) Architecture of the Scheimpflug atmospheric lidar system based on a Newtonian telescope; (b) Typical pixel-intensity lidar signal; (c) Range-intensity lidar signal transferred by pixel-range lidar signal
Fig. 4. (a) Measurement geometry, (b) physical diagram of the pulsed lidar system, and (c) physical diagram of the Scheimpflug lidar system. The rain-proofed SLidar system was placed on the rooftop while the pulsed lidar system was located inside a laboratory
Fig. 5. Time-range evolution maps of range-corrected log-scale lidar signals measured by (a) the pulsed lidar system and (b) the SLidar system while slope measurement from 11th June 2019 to 12th June 2019. The elevation angle was about 30˚
Fig. 6. Time-space evolution map of the atmospheric backscattering signals measured by an 808 nm all-day SLidar system
Fig. 7. Measurement principles of atmospheric polarization lidar. (a) Dual-channel pulsed polarization lidar, (b) Polarization Scheimpflug lidar based on the time-division multiplexing scheme, (c) Polarization-sensitive imaging lidar utilizing a polarized image sensor
Fig. 8. Time-space map of the linear volume depolarization ratio measured by the polarization-sensitive imaging lidar in Dec. 2019
Fig. 9. (a) Portable SLidar atmospheric system based on a refracting telescope. Transmitter:
Fig. 10. (a) Atmospheric backscattering intensity distribution map and (b) atmospheric extinction coefficient retrieving map measured by a scanning SLidar system. The SLidar system was placed on the roof of a shopping mall in Changli, Qinhuangdao City, Hebei Province
Fig. 11. (a) Schematic and (b) photograph of the three-wavelength polarization SLidar system developed at Dalian University of Technology
Fig. 12. (a) Time-range evolution map of the linear volume depolarization ratio at 808 nm,(b) Temporal evolution curves of the median of linear volume depolarization ratio and the median of Ångström exponent
Fig. 13. Schematic of NO2 absorption spectrum, the and laser spectra NO2吸收光谱及激光器发射光谱示意图
Fig. 14. (a) Architecture of the 2D fluorescence SLidar principle; (b) Data cloud reconstruction result of a grapefruit tree with the 2D fluorescence SLidar 5 m away, the dot cloud intensity represents the signal intensity ratio of red channel to blue channel of image sensor
Fig. 15. Architecture of the inelastic scattering hyperspectral SLidar system
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Liang Mei, Zheng Kong, Hongze Lin, Ruonan Fei, Yuan Cheng, Zhenfeng Gong, Ke Chen, Kun Liu, Dengxin Hua. Recent advancements of the lidar technique based on the Scheimpflug imaging principle (Invited)[J]. Infrared and Laser Engineering, 2021, 50(3): 20210033
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Received: Jan. 5, 2021
Accepted: --
Published Online: Jul. 15, 2021
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