Design of non-imaging receiving system for large field of view lidar

Li, Qingyan; Wang, Chunhui; Wei, Xiangdong; Ye, Bin; Wang, Shuo; Chen, F; Gong, Hao

doi:10.1016/j.infrared.2023.104802

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…In addition, the pulse width of the emitted laser is only a few ns, so a very fast response speed and response bandwidth are required for the subsequent signal readout circuit, which is another great challenge [ 9 , 10 , 11 ]. On the other hand, the single-element gaze receiving system has a simple structure, which can greatly simplify the design of the system and achieve miniaturization.…”

Section: Introductionmentioning

confidence: 99%

Design of Lidar Receiving Optical System with Large FoV and High Concentration of Light to Resist Background Light Interference

Li,

Wang,

et al. 2024

Micromachines

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Lidar has the advantages of high accuracy, high resolution, and is not affected by sunlight. It has been widely used in many fields, such as autonomous driving, remote sensing detection, and intelligent robots. However, the current lidar detection system belongs to weak signal detection and generally uses avalanche photoelectric detector units as detectors. Limited by the current technology, the photosensitive surface is small, the receiving field of view is limited, and it is easy to cause false alarms due to background light. This paper proposes a method based on a combination of image-side telecentric lenses, microlens arrays, and interference filters. The small-area element detector achieves the high-concentration reception of echo beams in a large field of view while overcoming the interference of ambient background light. The image-side telecentric lens realizes that the center lines of the echo beams at different angles are parallel to the central axis, and the focus points converge on the same focal plane. The microlens array collimates the converged light beams one by one into parallel light beams. Finally, a high-quality aspherical focusing lens is used to focus the light on the small-area element detector to achieve high-concentration light reception over a large field of view. The system achieves a receiving field of view greater than 40° for a photosensitive surface detector with a diameter of 75 μm and is resistant to background light interference.

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Section: Introductionmentioning

confidence: 99%

Design of Lidar Receiving Optical System with Large FoV and High Concentration of Light to Resist Background Light Interference

Li,

Wang,

et al. 2024

Micromachines

Self Cite

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Wide Field-of-View Reception and Beam Direction Estimation Based on Liquid-Filled Optical Receiver

Huang,

Sun,

Liu

et al. 2024

IEEE Photon. Technol. Lett.

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Advancement on target ranging and tracking by four-quadrant photon counting lidar

Hou,

Hu,

Zhao

et al. 2024

Opt. Express

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Single-photon lidar stands out as a promising technology for long-distance lidar applications, owing to its attributes of single-photon sensitivity and high repetition rate. Existing single-photon lidar systems typically rely on single-point scanning for positioning and tracking, necessitating intricate and precise scanning control. In pursuit of a more concise and efficient positioning, we incorporate the four-quadrant theory to articulate the signal formula of photon detection, and propose a novel single-photon four-quadrant positioning method. Our method, which includes signal preprocessing, compensation for longitudinal motion, extraction of pixel intensity, and acquisition of lateral motion, facilitates motion acquisition and positioning for targets. Through simulation calculations, we analyze and compare the effectiveness of each step of the method. With longitudinal and lateral speeds of 100 m/s and 50 m/s, respectively, the trajectory error is 1.7%, and the average speed error is 1.8%. Moreover, for various verification experiments, the trajectory errors are all below 4.2%, and the average speed errors remain under 5.4%, effectively verifying the validity of our method in acquiring the motion information and positioning of targets. It provides an excellent option for acquiring motion information and tracking small moving targets over long distances.

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Design of non-imaging receiving system for large field of view lidar

Cited by 3 publications

References 20 publications

Design of Lidar Receiving Optical System with Large FoV and High Concentration of Light to Resist Background Light Interference

Design of Lidar Receiving Optical System with Large FoV and High Concentration of Light to Resist Background Light Interference

Wide Field-of-View Reception and Beam Direction Estimation Based on Liquid-Filled Optical Receiver

Advancement on target ranging and tracking by four-quadrant photon counting lidar

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