为了满足半导体激光器线阵的远距离应用要求，需要对激光束进行准直处理。提出了一种由垂直双半圆柱透镜组合阵列构成的准直器，采用光线追迹的方法推导了激光束通过准直器的传输方程，分析了光线出射角与透镜阵列参数之间的关系，得出了准直器的最优设计参数，然后在Zemax-EE 非序列模式下仿真了此准直器的三维效果图以及探测器成像效果，得到的激光光斑接近于矩形，非相干照度集中在中央区域，并且经过准直器后的发散角大约为3 mrad。设计的准直透镜可以同时压缩快慢轴的激光束发散角，制作简单，安装方便。

In order to expend the application of the laser diode linear array in the far field, the collimation system is required. A collimation system is designed by vertical double half micro-cylindrical lens combination array. Ray-tracing method is used to analyze the transmission equation of the laser beam and the divergence angle changing with some parameters of the lens is analyzed to get the optimization design. Then, the shaded model picture and the detector viewer are simulated in non-sequential tracing by Zemax-EE, and the laser spot is gotten which is close to rectangle. The incoherent irradiance concentrates in the center-weighted area, and the divergence angle of the beam after the collimation system is about 3 mrad. The collimation system can collimate the diverse angle of two directions simultaneously, and the fabrication and installation is easy.