仿生学视场的微动扫描光学系统  

Micro moving scanning optical system of bionic field of view

作　　者：余振康 梁海锋[1] 张杨博文 YU Zhenkang;LIANG Haifeng;ZHANGYANG Bowen(Xi'an Technological University,School of Optoelectronic Engineering,Xi'an 710021,China)

机构地区：[1]西安工业大学光电工程学院,陕西西安710021

出　　处：《光学技术》2024年第4期406-410,共5页Optical Technique

基　　金：西安市创新能力强基计划项目(21XJZZ0028)。

摘　　要：为满足车载激光雷达对大视场的需求,设计了一种基于微动非均匀阵列微透镜的光束扫描系统。该系统采用仿生学视场设计,并引入微透镜加折射棱镜的扫描结构,实现对大视场的有效分割和拼接。通过设计微透镜和折射棱镜的空间分布,实现视场的无缝连接。通过压电陶瓷驱动微透镜与折射棱镜的微小位移实现对光束的偏转,完成扫描光学系统对大视场的扫描。扫描光学系统工作波长为905nm,压电陶瓷位移量为200μm时,水平视场为112.5°,垂直视场为25°,出射光束均方根(RMS)半径均小于0.277°,其中高分辨率区域RMS半径均小于0.081°,方案具有体积小、扫描视场大、中心分辨率高等优点,为车载激光雷达扫描系统的小型化提供了参考。To meet the requirements for a wide field of view in vehicle-mounted LiDAR systems,a beam scanning system based on micro-motion non-uniform array microlenses has been designed.This system adopts a biomimetic field of view design and incorporates a scanning structure of microlenses and refractive prisms to effectively segment and stitch the wide field of view.By designing the spatial distribution of the microlenses and refractive prisms,a seamless connection of the field of view is achieved.The deflection of the beam is accomplished by the slight displacement of the microlenses and refractive prisms driven by piezoelectric ceramics,completing the scanning of the optical system over a wide field of view.The working wavelength of the scanning optical system is 905nm,and when the displacement of the piezoelectric ceramics is 200μm,the horizontal field of view is 112.5°,and the vertical field of view is 25°.The root-mean-square(RMS)radius of the exit beam is less than 0.277°,and in areas of high resolution,the RMS radius is less than 0.081°.This solution offers the advantages of compact size,large scanning field of view,and high central resolution,providing a reference for the miniaturization of vehicle-mounted LiDAR scanning systems.

关 键 词：应用光学 扫描光学系统 仿生学视场 阵列微透镜 

分 类 号：TN958.98[电子电信—信号与信息处理] TN256[电子电信—信息与通信工程]