针对台灯照明的高均匀性要求，设计一个自由曲面透镜对 LED光源进行二次光学配光。根据非成像光学理论，在已知入射光强分布与所需配光效果的前提下，建立关于透镜自由曲面面型的偏微分方程，并采用相应的数值解法，得到自由曲面面型数据。通过在建模软件 Rhinoceros中建立光学透镜的模型，并在 Tracepro中进行光学仿真，得出仿真结果，验证此设计方法的可行性。

According to high uniformity requirements of desk lamp lighting, a free curved surface lens is de.signed to perform the secondary light distribution of light emitting diode (LED) light source. Based on the theory ofnon-imaging optics, at the condition of known incident light intensity distribution and required light distribution effect,partial differential equations related to the shape of free curved surface are established. And corresponding numericalvalue algorithm is adopted to obtain the data of the shape of free curved surface. The models of optical lens are builtthrough simulation software Rhinoceros. And optical simulation is performed in Tracepro. The simulation results areobtained to verify the feasibility of the design method.