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提出了一种用于LED准直照明的非球面透镜设计方法,该方法产生于对非球面几何光学特性分析和粒子群优化算法优越的寻优能力。用该方法设计了一个基于点光源准直的出光口径30 mm的非球面透镜,为了证明准直透镜的准直效果,用光线追迹方法模拟了准直透镜对于点光源的准直过程。模拟结果显示,点光源经准直透镜后出射光线的最大半视场角为0.004 60,0.8 mm×0.8 mm LED光源经准直透镜后出射光线的最大半视场角为4.91°,表明了粒子群算法用于非球面准直透镜设计的可行性和有效性。与现有的设计方法相比,该设计方法意义更直观,实施更简单。
An aspheric lens design method for LED collimating illumination is proposed. The method is based on the excellent ability of optimization of aspheric geometry and particle swarm optimization algorithms. In this method, an aspheric lens with a 30 mm aperture was designed based on the point light source collimation. In order to prove the collimation effect of the collimating lens, the collimation process of the collimating lens for the point light source was simulated by ray tracing method. The simulation results show that the maximum half field of view of the outgoing light source after passing through the collimator lens is 0.004 60,0.8 mm × 0.8 mm. The maximum half field of view of the emitted light after passing through the collimator lens is 4.91 °, indicating that the particle The feasibility and effectiveness of the group algorithm for aspheric collimating lens designs. Compared with the existing design methods, the design method is more intuitive and easier to implement.