發(fā)布時(shí)間：2018-06-19 16:38

  本文選題：LED + 自由曲面透鏡　； 參考：《光子學(xué)報(bào)》2016年02期

【摘要】：基于能量守恒定律和網(wǎng)格劃分法,設(shè)計(jì)了一種實(shí)現(xiàn)LED陣列近場(chǎng)均勻照明的自由曲面大角度透鏡,其內(nèi)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(guān)系,對(duì)光源和目標(biāo)面進(jìn)行網(wǎng)格劃分,并結(jié)合折射定律,迭代求解出外自由曲面數(shù)據(jù)點(diǎn).分析了橢圓形內(nèi)曲面的長(zhǎng)短軸比值對(duì)透鏡菲涅耳損耗和照度均勻性的影響.結(jié)果表明:短軸與長(zhǎng)軸的比值在0.35~0.55時(shí),出光效率和照度均勻性最佳.通過(guò)反饋優(yōu)化法對(duì)LED陣列進(jìn)行優(yōu)化,重新劃分網(wǎng)格,使疊加部分光照度減弱,提高了整體光照均勻性.仿真結(jié)果表明:僅對(duì)透鏡外自由曲面的面型數(shù)據(jù)點(diǎn)進(jìn)行優(yōu)化,在目標(biāo)面高度為80mm,透鏡出光角度為157°時(shí),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(xué)信息科學(xué)與工程學(xué)院福建省光傳輸與變換重點(diǎn)實(shí)驗(yàn)室;
【基金】：福建省科技計(jì)劃重點(diǎn)項(xiàng)目(No.2013I0004) 光傳輸與變化福建省重點(diǎn)實(shí)驗(yàn)室開(kāi)放課題(No.2014201)資助~~
【分類(lèi)號(hào)】：TN312.8

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本文編號(hào)：2040512