光纤扫描激光雷达技术

Fiber scanner ladar technology

简单介绍了新体制光纤扫描激光雷达的原理及组成,包括两套对称的光纤束,分别用作激光束的发射和接收系统。介绍了该雷达系统光束扫描范围、光束发散角及物镜的有效通光口径等参数的设定,前两者主要由传能光纤的孔径、摆布位置、透镜物镜的焦距等确定,这三者的关系是密切相关、互相制约的。分析了光纤扫描激光雷达关键技术,即如何提高空间自由光与光纤的耦合效率,详细分析了影响激光光纤耦合效率的因素,包括光纤耦合条件、高精度光纤面板加工、激光发射与扫描电机同步控制。指出实现光纤扫描激光雷达的现实性。

The working principle and components of the new fiber scanner ladar were introduced briefly, which include two sets of symmetry fiber bundles used as transmitting and receiving system of laser beam. The parameters determining such as scanning field, divergent angle of beam and effective clear aperture object lens were described in detail. The front two factors were determined by the aperture of the fiber, distributed position, focus length of object lens etc. The parameters relations were correlative and restrictive. The key technology was analyzed, that is how to improve coupling efficiency between space free light and fiber. The factors effecting coupling efficiency were analyzed, including coupling conditions, high precision machining of the fiber panel, synchronously controlling of laser transmitting and electrical machine scanning. The possibility of new fiber scanner ladar system was also discussed.