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针对三维成像多波束激光雷达系统微弧度量级激光发散角和多元并行收发条件下极高配准精度要求,进行了收发配准技术的研究和验证。提出了多波束激光雷达系统收发配准的方法,实现了一套基于光纤光学的收发光学系统分离的高精度收发光学系统;发射激光的单元发散角达到了近衍射极限的20μrad,接收视场达到60μrad,实现了1 064 nm近红外波段51元的线列并行收发,收发配准精度达到10μrad以下。实验验证结果显示,该收发配准的方法具有较好的可行性,配准的精度能达到理论分析要求。经过温度等环境因素的分析,系统在一定的温度范围内具有较好的稳定性,该温度范围较易控制,能够满足多波束激光雷达系统的工程应用要求。
Aiming at the requirements of very high registration accuracy of micro-arc-order laser beam divergence and multi-parallel receiving and dispatching conditions in three-dimensional imaging multi-beam laser radar system, the transceiver technology is researched and verified. A multi-beam Lidar system is proposed to send and receive signals. A high-precision optical transceiver system based on fiber optics is realized. The divergence angle of the laser beam reaches 20μrad near the diffraction limit, 60μrad, realizing the parallel transmission and reception of 51 yuan in the 1 064 nm near-infrared band with the accuracy of transceiving and registration below 10μrad. Experimental results show that the method of receiving and sending registration has a good feasibility and the accuracy of registration can reach the theoretical analysis requirements. After temperature and other environmental factors analysis, the system has good stability in a certain temperature range, the temperature range is easier to control, to meet the multi-beam laser radar system engineering requirements.