建立了中继镜系统模型，根据中继镜系统两套自适应光学装置不同的工作条件和用途，分析了宜选用的系统类型，结果显示光源处的自适应光学装置宜选用共轭式；飞行平台处的自适应光学装置宜选用优化式。在此基础上，使用Hafnagel-Valley 5/7大气湍流模型，建立载荷平台高度30 km、目标高度25 km、下行传输瞄准精度1 μrad的中继镜系统，分析说明了第二套自适应光学装置存在必要性及其对中继镜系统性能的影响；数值模拟了0阶、5阶、10阶、20阶、50阶校正精度条件下以及理想校正时中继镜系统的光束传输性能。计算结果显示：双自适应光学装置对中继镜系统光束传输性能提升具有重要影响；闭环理想校正时，中继镜系统上行链路能量耦合效率由58.82%提升至81.27%，靶面光斑0.5 cm桶中功率比例由1.07%提升至15.85%。

A typical model of the relay mirror system is established, and the appropriate styles of the two adaptive optics installations used in a relay mirror system are analyzed according to the different working conditions and different uses. It is recognized that the adaptive optics installation located at the light source may use the conjugate adaptive optics, the adaptive optics installation located on the platform may use the optimization algorithm based adaptive optics. Based on a laser relay mirror system under the Hufnagel-Valley 5/7 at atmospheric turbulence model condition and with target height of 25 km, platform height of 30 km, and downlink aiming precision of 1 μrad, necessarity of the second adaptive optics installation its influence on the system performance is analyzed. Performances of beam propagation through the relay mirror system with certain correction precisions of 0, 5th, 10th, 20th and 50th order as well as ideal correction condition are simulated, results show that the two adaptive optics installations have a great impact on the system performance improvement, uplink power efficiency can be improved from 58.82% to 81.27% and power proportion in 0.5 cm bucket at the target can be improved from 1.07% to 15.85% under closed-loop mode with ideal adaptive optics precision.