为使太阳模拟器的接收靶得到高能流高均匀度光斑，需要对聚光系统进行优化设计。提出利用非共轴椭球面聚光镜优化光斑质量的方法，使光斑的能流分布均匀度有明显改善。利用蒙特卡罗光线追迹方法，设计了聚集型高焦比太阳模拟器。在第二焦面处，80 mm直径的接收靶面上可接收10 kW的辐射光能，光斑对称性和均匀性好，系统的传递效率为23.81%，80 mm直径靶面内的平均能流密度为2 MW/m2，50 mm直径靶面内平均能流密度达到3.64 MW/m2，对应的理论色温超过2800 K。采用非共轴椭球面聚光镜，成功研制了由电源控制系统、冷却系统、氙灯光源和聚光系统构成的太阳能模拟器。经实验测试，太阳模拟器的聚光光斑与光学仿真软件TracePro模拟光斑符合得很好。

To get a high-flux and high-uniformity spot in the target of solar simulator, the design and optimization of reflector are needed. Using non-coaxial ellipsoidal reflector to improve the quality of spot, the flux uniformity of spot is improved obviously. By using Monte-Carlo ray tracing method, a high flux concentrating solar simulator is designed. The target of 80 mm diameter can receive 10 kW radiative power on the second focal plane. The symmetry and uniformity of radiative spot are good, and the transfer efficiency of system from source to target is 23.81%. The average flux is 2 MW/m2 in the 80 mm diameter target and the flux can get 3.64 MW/m2 in the 50 mm diameter target which corresponds to a theoretical stagnation temperature of 2800 K. Non-coaxial ellipsoidal reflector is used to manufacture a solar simulator making up of supply control system, cooling system, xenon lamps and a condenser system. The focusing spot of solar simulator obtained in experiment test accords with the model spot by optical design simulation software TracePro.