板上芯片型LED光源均匀照明自由曲面透镜设计

发布时间：2018-04-02 02:14

本文选题：光学设计　切入点：非成像光学　出处：《激光与光电子学进展》2017年01期

【摘要】：提出了基于能量映射关系和易加工性约束的照度偏离量累加反馈优化算法,并设计了一款可实现照度均匀分布的基于板上芯片(COB)型发光二极管(LED)光源的自由曲面透镜。本算法将每次迭代反馈优化后的仿真光分布与目标光分布的照度偏离量,累加到预设目标光分布进行修正,并利用修正后的目标光分布结合能量映射关系重构自由曲面透镜模型;同时,从易加工性的角度提出在反馈优化过程中将透镜外曲面下半部分约束为竖直面。以Cree CXA1816COB LED为光源设计了相应的自由曲面透镜,结果表明,经过3次反馈优化后即可在距离光源1000mm、半径为1480mm的圆形区域实现均匀照度分布。根据设计结果加工了相应的透镜并进行照明效果的测试,实测的照度分布与仿真结果比较吻合。
[Abstract]:An accumulative feedback optimization algorithm for illumination deviation based on energy mapping and processability constraints is proposed. A free-form curved lens with uniform illumination distribution based on on-board COB type LED light source is designed.In this algorithm, the illumination deviation between the simulated light distribution and the target light distribution after each iteration feedback optimization is added to the preset target light distribution for correction.The free surface lens model is reconstructed by the modified light distribution and energy mapping relationship, and the lower half of the outer surface of the lens is constrained to a vertical plane in the feedback optimization process from the point of view of processability.The corresponding free-form curved lens is designed with Cree CXA1816COB LED as the light source. The results show that the uniform illumination distribution can be realized in the circular region with a radius of 1480mm and 1000mm distance from the light source after three times feedback optimization.According to the design result, the corresponding lens is manufactured and the illumination effect is tested. The measured illumination distribution is in good agreement with the simulation results.
【作者单位】：五邑大学应用物理与材料学院;五邑大学数学与计算科学学院;华南农业大学电子工程学院;
【基金】：广东省自然科学杰出青年基金(2014A030306005) 广东省高等学校人才引进专项(粤财教[2013]246,江财教[2014]10) 广东省高等学校优秀青年教师培养计划项目(粤教师函[2014]108) 广东省科研创新团队(2015KCXTD027) 江门市科技计划项目(江财工[2012]156,江科[2014]145) 大学生创新创业训练计划项目(教高司函[2014]58,粤教高函[2014]132)
【分类号】：TN312.8

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