反射式激光聚焦系统使激光推力器具备了推力矢量控制能力, 并且聚焦系统不存在球差, 具有广阔的应用前景。针对三种二次反射聚焦方式, 抛物面-双曲面、平面-抛物面、抛物面-平面, 在建立的聚焦系统坐标系下, 通过几何光学方法分析了两个反射面母线参数之间的数学关系, 以及聚焦特征参数与两个反射面母线参数的关系, 并建立了程序设计流程。针对特定的聚焦特征参数设计要求, 在光学软件ZEMAX中进行了反射面的建模和聚焦效果的验证, 为下一步开展聚焦性能的研究打下了基础。

Laser thrusters adopting reflecting laser focusing systems feature thrust vector control and eliminate spherical aberration, which have extensive application prospect. Three focusing methods, the paraboloidhyperboloid, the paraboloidplane and the planeparaboloid, are presented. Through building the coordination of the focusing system, the mathematic relationship of the bus parameters of the reflectors is analyzed by the geometrical optics approach. And the relationship of the bus parameters and the focusing parameters is built. The program design process of the focusing system is built. The models of the reflectors are constructed in ZEMAX and the focusing effectiveness is verified, which would support the consequential researches on the focusing performance.