为实现高功率激光装置长程传输光路中反射镜法线指向的精密准直，分析了反射镜法线指向安装误差来源。针对高功率激光装置结构和安装特点，选取了预准直、模块姿态离线复制和柔性对接相结合的精密准直方案。对离线准直测量精度和复位精度进行了验证，实验数据证实了方案的可行性。该技术在神光-Ⅲ主机装置光传输系统安装调试中取得了良好的效果。

In order to realize the precise alignment of normal orientation of mirrors in the long-distance optical transmission path of high-power laser device, installation error sources based on mirror normal orientation are analyzed. As for the structural and installation features of high-power laser device, a precise alignment scheme which combines pre-collimation, module-pose off-line coping, and flexible joining is selected. The off-line collimation and reset precision are verified, and the experimental data confirms the feasibility of the above scheme. This technique has achieved favorable effectiveness in the assembly and debugging of transport system in Shenguang-Ⅲ laser driver.