A study of correction method to the pincushion distortion based on dual galvanometer LiDAR scanning system

Li, Yunxi; Cui, Tongfei; Li, Qingyan; Zhang, Bin; Bai, Yuru; Wang, Chunhui

doi:10.1016/j.ijleo.2018.12.054

Cited by 19 publications

(14 citation statements)

References 6 publications

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“…Other applications include laser scanning microscopy, LiDAR, etc. [9,10]. Although affordable, the cost ranges from a few thousand US dollars to more than ten US dollars [5]; therefore, galvanometer scanners are usually not considered as a low-cost option.…”

Section: Introductionmentioning

confidence: 99%

Low-Cost 3D-Printed Electromagnetically Driven Large-Area 1-DOF Optical Scanners

et al. 2022

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In this paper, we demonstrate 3D-printed 1-DOF (one torsional axis; 1 degree of freedom) optical scanners with large mirror areas (up to 20 × 20 mm2). Each device consists of an aluminum-coated square silicon substrate serving as the mirror, two miniature permanent magnets, an electromagnet, and a 3D-printed structure including the mirror frame, torsion springs, and base. One device can reach a static half optical scan angle of 14.8 deg., i.e., a full optical scan angle of 29.6 deg., at 12 VDC; this particular device exhibits a mechanical resonance frequency of 84 Hz. These scanners can be a potential, low-cost alternative to the expensive conventional galvanometer scanners.

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Section: Introductionmentioning

confidence: 99%

Low-Cost 3D-Printed Electromagnetically Driven Large-Area 1-DOF Optical Scanners

et al. 2022

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“…[11] It can meet the requirements of the laser radar scanning system for the scanner. [12] Li et al [13] presented a method for correcting distortion to achieve the effect of correcting distortion.…”

Section: Introductionmentioning

confidence: 99%

A scanning distortion correction method based on X – Y galvanometer Lidar system*

Qi¹,

Wang²,

Guo³

et al. 2021

Chinese Phys. B

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Aiming at the problem of scanning distortion in X–Y galvanometer light detecting and ranging (Lidar) scanning system, we propose a method of image scanning distortion correction with controllable driving voltage compensation. Firstly, the geometrical optics vectors model is established to explain the principle of pincushion distortion in the galvanometer scanning system, and the simulation result of scanning trajectory is consistent with experiments. The linear relationship between the driving voltage and the scanning angle of the galvanometer is verified. Secondly, the relationship between the deflection angle of the galvanometer and the scanning trajectory and the driving voltage is deduced respectively, and an image scanning correction algorithm with controllable driving voltage compensation is obtained. The simulation experiment results of the proposed method show that the root-mean-square error (RMSE) and the corresponding curve between the scan value and the actual value at different distances, have a good correction effect for the pincushion distortion. Finally, the X–Y galvanometer scanning Lidar system is established to obtain undistorted two-dimensional scanned image and it can be applied to the three-dimensional Lidar scanning system in the actual experiments, which further demonstrates the feasibility and practicability of our method.

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“…Laser technology has been widely used in various fields, such as laser communication, lidar, laser ranging, and space optical communication. [1][2][3][4][5] The system's requirements for laser beams are also becoming stricter, requiring the laser beam spot energy to be concentrated and the divergence angle in far-field to be small. The laser beam divergence angle is an important parameter of laser quality.…”

Section: Introductionmentioning

confidence: 99%

Dynamic measurement of beam divergence angle of different fields of view of scanning lidar*

Li¹,

Yan²,

Zhang³

et al. 2021

Chinese Phys. B

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The laser beam divergence angle is one of the important parameters to evaluate the quality of the laser beam. It can not only accurately indicate the nature of the beam divergence when the laser beam is transmitted over a long distance, but also objectively evaluate the performance of the laser system. At present, lidar has received a lot of attention as a core component of environment awareness technology. Micro-electromechanical system (MEMS) micromirror has become the first choice for three-dimensional imaging lidar because of its small size and fast scanning speed. However, due to the small size of the MEMS micromirror, the lidar scanning system has a small field of view (FOV). In order to achieve a wide range of scanning imaging, collimating optical system and wide-angle optical system are generally added to the system. However, due to the inherent properties of the optical lens, it is impossible to perfect the imaging, so the effects of collimating and expanding the beam will be different at different angles. This article aims to propose a measurement system that dynamically measures the divergence angles of MEMS scanning lidar beams in different fields of view to objectively evaluate the performances of scanning lidar systems.

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A study of correction method to the pincushion distortion based on dual galvanometer LiDAR scanning system

Cited by 19 publications

References 6 publications

Low-Cost 3D-Printed Electromagnetically Driven Large-Area 1-DOF Optical Scanners

Low-Cost 3D-Printed Electromagnetically Driven Large-Area 1-DOF Optical Scanners

A scanning distortion correction method based on X – Y galvanometer Lidar system*

Dynamic measurement of beam divergence angle of different fields of view of scanning lidar*

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