Статья

Off-Axis Four-Reflection Optical Structure for Lightweight Single-Band Bathymetric LiDAR

Guoqing ZhouGuangxi Key Laboratory of Spatial Information and Geomatics, the College of Earth Sciences, the College of Geomatics and Geoinformation, and the College of Mechanical and Control Engineering, Guilin University of Technology, Guilin, ChinaJiasheng XuCollege of Earth Sciences and the Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin, ChinaHaocheng HuDepartment of Precision Instrument, Tsinghua University, Beijing, ChinaZhexian LiuCollege of Mechanical and Control Engineering and the Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin, ChinaHaotian ZhangCollege of Information Science and Engineering and the Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin, ChinaChao XuCollege of Mechanical and Control Engineering and the Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin, ChinaXiang ZhouSchool of Microelectronics, Tianjin University, Tianjin, ChinaJiazhi YangCollege of Information Science and Engineering, Guilin University of Technology, Guilin, ChinaXueqin Nong34th Research Institute, China Electronics Technology Group Corporation, Guilin, ChinaBo SongCollege of Earth Sciences and the Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin, ChinaNaihui SongCollege of Mechanical and Control Engineering and the Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin, ChinaKe GaoCollege of Mechanical and Control Engineering and the Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin, ChinaGuoshuai JiaCollege of Mechanical and Control Engineering and the Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin, ChinaHanjiang XiongState Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, ChinaYiqiang ZhaoSchool of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, China

2023en

ABI

Аннотация

A traditional bathymetric LiDAR (light detection and ranging) has disadvantages such as large volume, heavy weight, necessity for airport and runway, and high cost for operation. For these reasons, this paper presents an off-axis four-reflection optical structure for single-band (532 nm) bathymetric LiDAR carried on UAV (Unmanned Aerial Vehicle). This optical system fully considers characteristics of the laser echo energy under different water conditions, which relate with the optical system parameters, such as peak power of laser emission, field of view (FOV), receiver aperture area, etc. The proposed optical system designs the objective lens, which are composed of one APD detector and two PMT detectors, the primary mirror, the second mirror, the plane mirror and the third mirror, two split field mirrors that separate the echo signals from shallow water, medium water and deep water, respectively. This proposed optical system was verified in laboratory tank, swimming pool, Lijiang River, lake, and the Qiaogang Sea Bay. It is found that the maximum water depth measured can reach 25.0 m with an error less than 0.1 m averagely. The dimension and weight of this LiDAR reach 90mm×160mm×90mm, and 10.25 kg, respectively, which is lightest and smallest bathymetric LiDAR worldwide.

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Идентификаторы

DOI: 10.1109/tgrs.2023.3298531

Цитирования и источники

Цитирований: 3Использованных источников: 0

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