针对传统光束整形的窄带激光束能量主要集中在光束的中间部分，这种能量分布近似于高斯分布，无法满足大视场线阵推扫激光 3D成像雷达的技术要求。本文提出一种新型的光束整形技术来解决推扫式激光雷达需要窄带状激光束的问题。该方法根据锥镜的光学特性，采用双轴锥改变激光束的空间能量分布，再经过柱面镜后激光束整形为“ U”型窄带状激光束。实验结果表明，整形后的“ U”型窄带状激光束能够满足大视场线阵推扫激光三维成像雷达技术要求。

Energy is concentrated in the middle part of the beam for the traditional narrowband laser beam shaping. This energy distribution approximates a Gaussian distribution which can not meet the requirements of large field line Pushbroom 3D imaging laser radar technology. A novel beam shaping technology is proposed to solve the problem of Pushbroom lidar which needs a narrow strip of the laser beam. According to the optical properties of cone mirror, we use Biaxial Axicon to change the spatial energy distribution of the laser beam, and then energy distribution of the laser beam are shaped "U" through the cylindrical lens. Experimental results show that the "U" shaped narrowband of the laser beam can meet the requirements of large field of linear array push-broom imaging 3D laser radar.