采用理论推导和计算仿真的方法对LED阵列光源的照明均匀性进行了研究。重点分析了LED阵列的空间角度辐射分布和平面照度分布，结合实验室辐射定标对光源均匀性的要求，设计了LED阵列光源模型，并利用LightTools软件对该模型的照明均匀性进行仿真。仿真结果表明LED阵列面均匀性可达98.3%，空间角度辐射均匀性可达98.2%。对Labsphere积分球进行均匀性测试，并将LED阵列模型的仿真结果与积分球测试结果进行了比较。对比结果表明，LED阵列仿真结果达到与积分球接近的指标，证明设计的LED阵列光源满足实验室辐射定标对光源均匀性的要求。

Illumination uniformity of LED arrays is studied through theoretical derivation and computing simulation. The spatial angle distribution and plane illuminance distribution are analyzed. A source model of LED arrays is designed based on the requirement of illumination uniformity of laboratory radiation calibration. The illumination uniformity of the model is simulated using LightTools. Simulation results show that the LED arrays′ irradiance uniformity is 98.3% and the spatial angle radiation uniformity is 98.2%. The Labsphere integrating sphere is tested and compared with simulation results. The simulation results are close to the test results of integrating sphere, which indicat that the designed LED arrays satisfy the requirement on source uniformity of laboratory radiation calibration.