本文選題：LED + 自由曲面透鏡��； 參考：《光子學報》2016年02期

【摘要】：基于能量守恒定律和網格劃分法,設計了一種實現(xiàn)LED陣列近場均勻照明的自由曲面大角度透鏡,其內曲面為橢圓形曲面、外曲面為自由曲面.根據(jù)能量守恒定律建立映射關系,對光源和目標面進行網格劃分,并結合折射定律,迭代求解出外自由曲面數(shù)據(jù)點.分析了橢圓形內曲面的長短軸比值對透鏡菲涅耳損耗和照度均勻性的影響.結果表明:短軸與長軸的比值在0.35~0.55時,出光效率和照度均勻性最佳.通過反饋優(yōu)化法對LED陣列進行優(yōu)化,重新劃分網格,使疊加部分光照度減弱,提高了整體光照均勻性.仿真結果表明:僅對透鏡外自由曲面的面型數(shù)據(jù)點進行優(yōu)化,在目標面高度為80mm,透鏡出光角度為157°時,優(yōu)化后的整體光照均勻度由優(yōu)化前的0.40提高到0.84,出光效率大于0.9.
[Abstract]:Based on the law of conservation of energy and the method of grid division, a large angle lens of free form surface is designed to realize uniform illumination of the near field of LED array. The inner surface is an oval surface and the outer surface is a free surface. According to the law of conservation of energy, the mapping relation is set up. The grid of the light source and the target surface is divided, and the law of refraction is iteratively solved. The effect of the ratio of the length and length of the elliptical surface to the Fresnel loss and illumination uniformity of the lens is analyzed. The results show that the ratio of the short axis to the long axis is the best when the ratio of the long axis to the long axis is 0.35~0.55. The feedback optimization method is used to optimize the LED array and remesh the mesh to make the superposition part of the light. The overall illumination uniformity is improved. The simulation results show that the optimization of the surface data point of the free surface of the lens is only with the target surface height of 80mm and the angle of the lens output is 157 degrees. The overall illumination uniformity after optimization is increased from 0.40 before the optimization to 0.84, and the output efficiency is greater than 0.9..
【作者單位】： 華僑大學信息科學與工程學院福建省光傳輸與變換重點實驗室;
【基金】：福建省科技計劃重點項目(No.2013I0004) 光傳輸與變化福建省重點實驗室開放課題(No.2014201)資助~~
【分類號】：TN312.8

【相似文獻】

相關期刊論文 前10條

1 沈華;李嘉;朱日宏;榮四海;;基于點源陣列的自由曲面非零位干涉檢測系統(tǒng)設計方法[J];光學學報;2013年12期

2 逄永濤;張愛武;;自由曲面三維激光測量系統(tǒng)設計與開發(fā)[J];系統(tǒng)仿真學報;2008年S1期

3 程發(fā)超;牛麗紅;蘇秉華;蘇禹;;基于微分方程數(shù)值解的自由曲面透鏡的設計[J];光學技術;2013年03期

4 于莉媛;;LED路燈自由曲面二次光學透鏡的設計[J];能源與節(jié)能;2011年09期

5 張成亮;;一種實現(xiàn)LED均勻圓斑照明透鏡的自由曲面設計[J];電子科技;2014年09期

6 樊露青;李湘寧;王瑜;劉杰;;基于自由曲面的LED全反射準直透鏡的設計[J];應用光學;2013年02期

7 朱進;高志山;袁群;葉井飛;張聰e，

本文編號：2040512