在测量领域中需要使具有高稳定性及良好光谱匹配性的人工模拟太阳光谱标准灯.本文提出一种基于多种不同峰值波长LED光源的方法来准确模拟AM1.5的光谱分布.以最小二乘法和高斯分布数学模型为基础，在理论上实现了非均匀间隔峰值波长的光谱拟合，从而指导LED的种类选择及其所需的驱动电流值，并通过实验论证其可行性.结果表明：在300~1100nm的范围内，使用较少LED种类的情况下，此方法光谱失配误差小于±2.76％.此算法可精确地分辨标准太阳光谱AM1.5的吸收谷，且应用于AM0的拟合时获得小于±1.67％的光谱失配度.在工程实践中，该算法对快速、准确获得标准太阳光谱灯具有良好的指导意义.

In order to achieve a LEDbased solar simulator or a standard spectrum lamp with high stability and good spectral matching that can be used in measurement, a method is proposed to accurately simulate the spectral power distribution (SPD) of AM1.5 by adopting many different peak wavelength LEDs. Least square (LS) method and the characteristics of Gaussian distribution are considered during the process of simulation. This approach theoretically achieves a spectral synthesize in order to guide the LED types selection and the drive current value. Experimental result proves its feasibility and show that: in the range of 300~1 100 nm, the spectral mismatch error is less than ±2.76%, and less LED species are adopted. This algorithm can accurately distinguish the absorption valleys of standard solar spectrum AM1.5. When applied to AM0, it results in the spectral mismatch less than ± 1.67%. For engineering application, the algorithm gives a good guiding significance to access standard solar spectrum lamp.