针对当前太阳模拟器辐照均匀性难以提高的问题，设计了一种新型集束式光学积分器。在对称式光学积分器理论分析的基础上，介绍了集束式光学积分器的设计过程，用LightTools 软件对太阳模拟器光学系统进行模拟仿真。结果表明，使用集束式光学积分器后，太阳模拟器不均匀度显著降低，在Φ 50 mm 范围内小于0.2%，Φ (50~120) mm 范围内小于1.5%，满足高辐照均匀性的使用要求。

In view of the difficulty in improving the irradiation uniformity of the current solar simulator, the paper introduces a new type of cluster- type optical integrator. The process of the cluster- type optical integrator based on the theoretical analysis of the symmetric optical integrator is introduced. The solar simulator optical system is simulated with LightTools software. The results show that: after using the cluster-type optical integrator, the irradiation non uniformity of solar simulator is significantly improved, irradiation non-uniformity in the range of Φ 50 mm is less than 0.2%, and in the range of Φ (50~120) mm is less than 1.5%. The results satisfy the requirements of high irradiation uniformity.