LED照明系统自由曲面透镜设计分析  

Design for Freeform Surface Lens of LED Lighting System

作　　者：梁立君[1,2] 牛萍娟[1,2,3] 邢海英[1,2,3] 

机构地区：[1]天津工业大学电子与信息工程学院,天津300387 [2]天津工业大学半导体照明工程研发中心,天津300387 [3]天津工业大学大功率半导体照明应用系统教育部工程研究中心,天津300387

出　　处：《激光与光电子学进展》2013年第9期159-165,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61204008);天津市应用基础及前沿技术研究计划(10JCZDJC15400);国家863计划(2010AA03A1A7)

摘　　要：通过设计基于LED光源的自由曲面透镜实现均匀圆形光斑的实例,提出一种快速建立光学器件模型的方法。该方法根据几何光学和非成像光学理论建立透镜的数学方程,由Matlab实现透镜面型数据的数值计算,由TracePro编程完成透镜建模,以动态数据交换(DDE)协议为基础建立Matlab与TracePro间的会话,可在TracePro中自动创建透镜实体模型。仿真结果表明,光通量为100lm,光源尺寸1mm×1mm,视角120°的LED朗伯型光源在5m远处的目标面上形成半径为3m的圆形光斑,光斑照度均匀性可达0.7,透镜效率为87%。与传统实现透镜实体模型的设计方法对比,本方法可以简化设计过程,节省设计时间,进一步证明其准确性和可靠性。By the example of designing freeform lens based on LED light source to achieve uniform circular spot, a new method of establishing optical device model is proposed. According to geometrical optics and non-imaging optics theory, the mathematical model of lens is derived. Numerical calculation of lens surface data is obtained by Matlab, and by TracePro programming the lens modeling is completed, then a conversation between Matlab and TracePro is created with the dynamic data exchange （DDE） protocol. In TracePro, the lens model is automatically created. The ray-tracing simulation results reveal that, the circular spot with the radius of 3 m on the target placed 5 m away is achieved by a LED Lambertian light source which has the luminous flux of 100 lm, size of 1 mm× 1 mm and a viewing angle of 120°. The uniformity of illumination reaches 0.7, and the lens efficiency can reach 87%. This method can simplify the design process and save time compared with conventional methods of lens entity model, which further proves its accuracy and reliability.

关 键 词：光学设计 LED照明系统 非成像光学 动态数据交换 

分 类 号：O439[机械工程—光学工程]