基于LED光源的新型准直透镜的设计  

New Design of Collimating Lens Based on LED Light Source

作　　者：白莹[1] 谢国庆[2] 林文硕[1] 钟勇[3] 

机构地区：[1]福建工程学院数理系,福建福州350108 [2]福建师范大学软件学院,福建福州350108 [3]福建工程学院机械与汽车工程学院,福建福州350108

出　　处：《激光与光电子学进展》2014年第5期165-170,共6页Laser & Optoelectronics Progress

基　　金：福建省闽台合作重点项目(2011I0001);福建省教育厅项目(JA09184)

摘　　要：利用复合抛物面与自由曲面相结合的方法,设计出一款体积小、能效高的LED光源准直配光透镜。将LED光源发出的光线分两部分分别进行配光设计。光源发出的一部分发散角为0o^20o的光线经过球冠折射收缩发散角后再利用自由曲面准直;光源发出的另一部分发散角为20o^80o的光线经过复合抛物面折射收缩发散角后再经自由曲面准直。结果显示,LED光线经此复合型准直透镜后光束发散角小于4o,光能利用率达90%,可满足目前对光源远距离准直需求。By combining the compound paraboloid with free-form surfaces, a small, energy-efficient collimating lens based on LED light source is designed. The optical design is carried on in two parts separately. One part of the light, whose divergence angle between 0° and 20°, is collimated through a spherical cap contracted the divergence angle and a free-form surface. The other part of light, whose divergence angle between 20° and 80°, is collimated through a compound paraboloid contracted the divergence angle and a free-form surface. The results show that, light angle is less than 4° through this complex collimating lens, and the efficiency of light energy utilization is up to 90%, which could meet requirements for light collimation in current distance.

关 键 词：光学设计 准直 复合抛物面 自由曲面 

分 类 号：O435.2[机械工程—光学工程]