阵列LED均匀配光及渐变折射率透镜研究
发布时间：2019-04-24 17:19
【摘要】：针对直下式LED平板光源,本文分别对等边矩形阵列LED与蜂窝状阵列LED进行均匀配光。利用对照度图的对称性分析结果来构造配光曲线,设计出一款自由曲面透镜,实现整体照度均匀。在矩形阵列条件下,采用一种基于分段式线性配光曲线来生成配光透镜。设置距高比为4.1,以方形阵列排布的直下式LED平板光源为例,通过简单优化完成配光透镜的设计,仿真结果表明,目标面上照度的均匀度高于0.85,光效达到0.9以上,并适用于扩展光源。利用对称性分析可得到上述直下式LED平板光源出光面所能达到的均匀度上限,这对LED平板光源的光学设计具有指导意义。把矩形阵列LED平板光源的设计方法应用到蜂窝状阵列LED平板光源中。目标面上的配光曲线选择分段的余弦函数曲线。这比选择线性配光曲线所能达到的均匀度0.82要高。TracePro仿真后表明其光效约为0.92,均匀度可达到0.92以上。最后还介绍了渐变折射率光学(gradient index optics,GRIN)的发展历史及研究现状,根据光线追迹方程,利用MatLab实现光源到渐变折射率透镜(GRIN透镜),再到接收面的光线轨迹计算。并利用物理场仿真软件考证该算法的可行性。
[Abstract]:For the straight-down LED flat light source, the uniform distribution of light between the equilateral rectangular array (LED) and the honeycomb array (LED) is presented in this paper. A free-form surface lens is designed to construct the light distribution curve by using the symmetry analysis results of the contrast degree diagram, so as to achieve uniform illumination as a whole. Under the condition of rectangular array, a segment-based linear distribution curve is used to generate the light-distribution lens. Setting the height ratio of 4.1, taking the straight-down LED flat light source arranged by square array as an example, the design of the light distribution lens is completed by simple optimization. The simulation results show that the uniformity of illumination on the target surface is higher than 0.85, and the result of simulation shows that the uniformity of illuminance on the target surface is higher than 0.85. Light efficiency up to 0.9, and suitable for extended light source. Symmetry analysis can be used to obtain the upper limit of uniformity which can be achieved by the above-mentioned straight-down LED flat-panel light source, which has guiding significance for the optical design of LED flat-panel light source. The design method of rectangular array LED flat light source is applied to honeycomb array LED flat light source. The light distribution curve on the target surface selects the piecewise cosine function curve. This is higher than the uniformity of 0.82 which can be achieved by selecting the linear light distribution curve. The simulation results of TracePro show that the light efficiency is about 0.92 and the uniformity is more than 0.92. Finally, the development history and research status of gradient refractive index optics (gradient index optics,GRIN) are introduced. According to ray tracing equation, the light path from light source to gradient index lens (GRIN lens) and to receiving surface is calculated by MatLab. The feasibility of the algorithm is verified by physical field simulation software.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM923.34
本文编号：2464634
[Abstract]:For the straight-down LED flat light source, the uniform distribution of light between the equilateral rectangular array (LED) and the honeycomb array (LED) is presented in this paper. A free-form surface lens is designed to construct the light distribution curve by using the symmetry analysis results of the contrast degree diagram, so as to achieve uniform illumination as a whole. Under the condition of rectangular array, a segment-based linear distribution curve is used to generate the light-distribution lens. Setting the height ratio of 4.1, taking the straight-down LED flat light source arranged by square array as an example, the design of the light distribution lens is completed by simple optimization. The simulation results show that the uniformity of illumination on the target surface is higher than 0.85, and the result of simulation shows that the uniformity of illuminance on the target surface is higher than 0.85. Light efficiency up to 0.9, and suitable for extended light source. Symmetry analysis can be used to obtain the upper limit of uniformity which can be achieved by the above-mentioned straight-down LED flat-panel light source, which has guiding significance for the optical design of LED flat-panel light source. The design method of rectangular array LED flat light source is applied to honeycomb array LED flat light source. The light distribution curve on the target surface selects the piecewise cosine function curve. This is higher than the uniformity of 0.82 which can be achieved by selecting the linear light distribution curve. The simulation results of TracePro show that the light efficiency is about 0.92 and the uniformity is more than 0.92. Finally, the development history and research status of gradient refractive index optics (gradient index optics,GRIN) are introduced. According to ray tracing equation, the light path from light source to gradient index lens (GRIN lens) and to receiving surface is calculated by MatLab. The feasibility of the algorithm is verified by physical field simulation software.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM923.34
【参考文献】
相关期刊论文 前1条
1 李卓,朱崇恩,刘小鸿;固态发光器件前景光明[J];中国照明电器;2003年07期
，本文编号：2464634
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