Range imaging pulsed laser sensor with two-dimensional scanning of transmitted beam and scanless receiver using high-aspect avalanche photodiode array for eye-safe wavelength

Tsuji, Hiroyuki; Imaki, Masaharu; Hirai, Akihito; Nakaji, M.; Kameyama, Shumpei

doi:10.1117/1.oe.56.3.031216

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…The MEMS mirror has been widely used in the LiDAR system due to its advantage including small size, fast scanning speed, low power consumption, low price, and strong anti-interference. The MEMS scanning LiDAR has become the main application direction of today's LiDAR imaging system [15,16]. However, in the actual detection process, the obtained point cloud has obvious distortion, which seriously affects the application performance of the MEMS LiDAR, reduces the coverage of the detected target, and causes the loss of target information.…”

Section: Introductionmentioning

confidence: 99%

A Study of Correction to the Point Cloud Distortion Based on MEMS LiDAR System

Guo

Wang

et al. 2021

Applied Sciences

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Active imaging technology can perceive the surrounding environment and obtain three-dimensional information of the target. Among them, light detection and ranging (LiDAR) imaging systems are one of the hottest topics in the field of photoelectric active imaging. Due to the small size, fast scanning speed, low power consumption, low price and strong anti-interference, a micro-electro-mechanical system (MEMS) based micro-scanning LiDAR is widely used in LiDAR imaging systems. However, the imaging point cloud will be distorted, which affects the accurate acquisition of target information. Therefore, in this article, we analyzed the causes of distortion initially, and then introduced a novel coordinate correction method, which can correct the point cloud distortion of the micro-scanning LiDAR system based on MEMS. We implemented our coordinate correction method in a two-dimensional MEMS LiDAR system to verify the feasibility. Experiments show that the point cloud distortion is basically corrected and the distortion is reduced by almost 72.5%. This method can provide an effective reference for the correction of point cloud distortion.

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Section: Introductionmentioning

confidence: 99%

A Study of Correction to the Point Cloud Distortion Based on MEMS LiDAR System

Guo

Wang

et al. 2021

Applied Sciences

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“…Among them, the MEMS mirror has been used in several LiDARs due to its small size, fast speed, low power consumption etc. [9]- [11]. However, the MEMS mirror based scanning LiDAR suffers from two main limitations; a small scanning angle of MEMS mirror itself, slow imaging speed/frame rate as introduced by point-to-point scanning for the development of high resolution wide view image.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Enhancement of Scanning Area and Imaging Speed for a MEMS Mirror Based High Resolution LiDAR

Choudhury

Lee

2020

IEEE Access

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High speed imaging with improved resolution and wide area scanning are the ultimate targets for designing a MEMS mirror based LiDAR. Simultaneous improvements of above parameters are critical and yet pose design tradeoff among system complexity, cost and compatibility. Here, we propose a high resolution LiDAR for wide area scanning with improved frame rate by allowing minimum design constrains. Extended area scanning is achieved by simplified transmitter design with off-the-shelf low cost optics such as a beam splitter cube and a plane mirror. In addition, an effective scanning strategy is applied to improve the imaging speed for the extended coverage area, which involves sub-pixel imaging of selectively and sequentially shined target areas. Then, a high resolution image can be reconstructed after merging all the sub-pixel values. The proposed architecture is experimentally demonstrated to reconstruct a high resolution image of 1020 × 500 pixels at the fast refresh rate of 20 fps in extended FoV 52 • × 26 •. The system is also characterized in terms of linearity of extended optical angles, intensity distribution of light beam profile at several angular positions, and quality of scanned objects in the high resolution reconstructed image. INDEX TERMS Light detection and ranging (LiDAR), optical imaging, microelectromechanical-system (MEMS), laser scanning, image reconstruction.

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3D pulsed chaos lidar system

Cheng

Chen

et al. 2018

Opt. Express

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We develop an unprecedented 3D pulsed chaos lidar system for potential intelligent machinery applications. Benefited from the random nature of the chaos, conventional CW chaos lidars already possess excellent anti-jamming and anti-interference capabilities and have no range ambiguity. In our system, we further employ self-homodyning and time gating to generate a pulsed homodyned chaos to boost the energy-utilization efficiency. Compared to the original chaos, we show that the pulsed homodyned chaos improves the detection SNR by more than 20 dB. With a sampling rate of just 1.25 GS/s that has a native sampling spacing of 12 cm, we successfully achieve millimeter-level accuracy and precision in ranging. Compared with two commercial lidars tested side-by-side, namely the pulsed Spectroscan and the random-modulation continuous-wave Lidar-lite, the pulsed chaos lidar that is in compliance with the class-1 eye-safe regulation shows significantly better precision and a much longer detection range up to 100 m. Moreover, by employing a 2-axis MEMS mirror for active laser scanning, we also demonstrate real-time 3D imaging with errors of less than 4 mm in depth.

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Range imaging pulsed laser sensor with two-dimensional scanning of transmitted beam and scanless receiver using high-aspect avalanche photodiode array for eye-safe wavelength

Cited by 4 publications

References 10 publications

A Study of Correction to the Point Cloud Distortion Based on MEMS LiDAR System

A Study of Correction to the Point Cloud Distortion Based on MEMS LiDAR System

Simultaneous Enhancement of Scanning Area and Imaging Speed for a MEMS Mirror Based High Resolution LiDAR

3D pulsed chaos lidar system

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