针对目前采用单个球面镜压缩激光时存在发散角效 果差或者球面镜片数过多的问题，通过ABCD矩阵法从理论上对高斯光束经过单透镜时的传输特性进行了分析，得出了单透镜无法实现半导体激光光束 理想准直的结论。提出了一种基于ZEMAX的半导体光源准直镜的设计方案，并给出了设计与优化方法。结合工程中常用的808 nm半导体激光器，设 计了双片型808 nm半导体激光准直镜，并在ZEMAX中使用合适的优化函数和权重对像差进行了校正。通过采用非球面镜获得了较好的准直效 果，发散角达到了0.032 mrad。该设计使用的镜片数较少，结构简单。

When a single spherical mirror is used to compress laser beams, there usually is a problem that the poor divergence can be resulted in or too many spherical lenses have to be used. By using a ABCD matrix method to analyze the Gauss beam passing through a single lens in theory, a conclusion that the beam from a semiconductor laser can not be collimated ideally with a single lens is drew. A design scheme based on ZEMAX is proposed for the collimation of a semiconductor laser source. The design and optimization method is given. For a 808 nm semiconductor laser commonly used in engineering, a collimator with two lenses is designed and its aberration is corrected by using the proper optimization function and weight in ZEMAX. By using a non-spherical surface, fine collimation is implemented at a divergence angle of 0.032 mrad. This design has the features of less lenses and simple structure.