基于超连续光源与SPAD阵列的植被主动高光谱成像
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1南京航天航天大学 自动化学院,南京 211106;2国家高端航空装备技术创新中心,成都610074;3河海大学 力学与工程科学学院,南京 211100;4南京理工大学 自动化学院,南京 210094;5赫尔辛基大学 森林科学系,赫尔辛基 00014 芬兰;6国科大杭州高等研究院,杭州 310024;7南京工程学院 自动化学院,南京 211167

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S771.8

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国家自然科学基金;江苏省自然科学基金


Active hyperspectral imaging for vegetation based on a supercontinuum laser and SPAD array
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1College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;2National Center of Technology Innovation for Advanced Aviation Equipment, Chengdu 610074, China;3College of Mechanics and Engineering Science, Hohai University, Nanjing 211100, China;4School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China;5Department of Forest Sciences, University of Helsinki, Helsinki 00014, Finland;6Hangzhou Institute for Advanced Study, Hangzhou 310024, China;7School of Automation, Nanjing Institute of Technology, Nanjing 211167, China

Fund Project:

Supported by the National Natural Science Foundation of China (62573232, 62503224 61903190); the Natural Science Foundation of Jiangsu Province (BK20241388).

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    摘要:

    高光谱激光雷达是一种新兴的主动传感技术,可同时获取光谱和空间信息,用于定量遥感应用。然而,现有大多数HSL系统采用逐点采集方式,这限制了类图像高光谱数据和高密度三维点云的获取。本文提出了一种基于芯片级单光子雪崩二极管阵列(768 × 576)和超连续光源的高光谱成像激光雷达系统(SPAD-HSL)。该系统设计了可调焦发射结构以实现宽带照明,并构建了基于SPAD阵列的接收系统,通过光学滤波器实现波长选择性探测。基于所提SPAD-HSL系统,对共计12片叶片样本(包括5种不同植物及多种生理状态)在不同探测距离和角度下进行了高光谱测量。随后,将获得的光谱数据与光谱仪测量结果进行了对比,结果表明,该系统能够主动获取高光谱图像,并实现较高的光谱一致性。

    Abstract:

    Hyperspectral LiDAR (HSL) is an emerging active sensing technique that can simultaneously acquire spectral and spatial information for quantitative remote sensing applications. However, most existing HSL systems acquire spectral and spatial information point by point, which limits the acquisition of image-like hyperspectral data and dense 3D point clouds. In this paper, the authors presented a hyperspectral imaging LiDAR system based on a chip-scale single-photon avalanche diode (SPAD) array (768 × 576) and a supercontinuum laser source (SPAD-HSL). A focus-tunable emitting system was designed to provide broadband illumination, while a SPAD-array-based receiving system was developed to enable wavelength-selective detection using optical filters. Based on the proposed SPAD-HSL system, hyperspectral measurements were conducted on a total of 12 leaf samples, including 5 species and various physiological states, under different detection distances and angles. The acquired spectral data were subsequently compared with spectrometer measurements, demonstrating that the proposed system enables active hyperspectral imaging acquisition and achieves high spectral consistency.

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  • 收稿日期:2026-03-29
  • 最后修改日期:2026-05-25
  • 录用日期:2026-05-26
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