Edge artifact improvement in multipixel LiDAR imaging via tailored optical beam shaping

IF 2.5 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-09-18 DOI:10.1016/j.optcom.2025.132488

Xingyu Yang , Peifeng Li , Xianlei Meng , Dandan Qi , Tongyao Jia , Huifang Wang , Xuejun Wang

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引用次数: 0

Abstract

In push-broom topographic mapping using area-array lidar, due to the Gaussian energy distribution of the laser beam leads to edge information loss and black borders in the resulting images. To mitigate these issues, the system employs a microlens array to expand the beam's field angle and a double-layer lens for collimating the output, forming a “U”-shaped planar laser beam. The “U"-shaped planar laser beam exhibits Lambertian reflection when interacting with the target surface. Subsequently, the collimated echo beam scatters from the target surface, passes through a double-mirror system for optical path folding and pointing calibration, and ultimately produces a square spot with high uniformity through a double-stage microlens array and Fourier lens homogenization system. Mathematical models for both the output and receiving optical paths are formulated, scrutinized, and validated through imaging experiments. The outcomes demonstrate a notable enhancement in edge information detection efficiency by approximately 22.9 % within the proposed system, leading to the acquisition of more comprehensive target information and significantly elevating the imaging quality of multipixel area-array lidar.

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通过定制光束整形改善多像素激光雷达成像中的边缘伪影

在使用区域阵列激光雷达进行推帚式地形测绘时，由于激光束的高斯能量分布导致了图像边缘信息的丢失和黑色边界的产生。为了缓解这些问题，该系统采用微透镜阵列来扩大光束的视场角度，并采用双层透镜来准直输出，形成“U”形平面激光束。“U”型平面激光束与目标表面相互作用时表现出朗伯反射。随后，准直后的回波波束从目标表面散射出来，经过双镜系统进行光路折叠和指向标定，最终通过双级微透镜阵列和傅立叶透镜均匀化系统产生均匀度高的方形光斑。数学模型的输出和接收光路制定，审查，并通过成像实验验证。结果表明，在该系统中，边缘信息检测效率显著提高了约22.9%，从而获得了更全面的目标信息，显著提高了多像素区域阵列激光雷达的成像质量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.