陣列LED均勻配光及漸變折射率透鏡研究
發(fā)布時(shí)間：2019-04-24 17:19
【摘要】：針對直下式LED平板光源,本文分別對等邊矩形陣列LED與蜂窩狀陣列LED進(jìn)行均勻配光。利用對照度圖的對稱性分析結(jié)果來構(gòu)造配光曲線,設(shè)計(jì)出一款自由曲面透鏡,實(shí)現(xiàn)整體照度均勻。在矩形陣列條件下,采用一種基于分段式線性配光曲線來生成配光透鏡。設(shè)置距高比為4.1,以方形陣列排布的直下式LED平板光源為例,通過簡單優(yōu)化完成配光透鏡的設(shè)計(jì),仿真結(jié)果表明,目標(biāo)面上照度的均勻度高于0.85,光效達(dá)到0.9以上,并適用于擴(kuò)展光源。利用對稱性分析可得到上述直下式LED平板光源出光面所能達(dá)到的均勻度上限,這對LED平板光源的光學(xué)設(shè)計(jì)具有指導(dǎo)意義。把矩形陣列LED平板光源的設(shè)計(jì)方法應(yīng)用到蜂窩狀陣列LED平板光源中。目標(biāo)面上的配光曲線選擇分段的余弦函數(shù)曲線。這比選擇線性配光曲線所能達(dá)到的均勻度0.82要高。TracePro仿真后表明其光效約為0.92,均勻度可達(dá)到0.92以上。最后還介紹了漸變折射率光學(xué)(gradient index optics,GRIN)的發(fā)展歷史及研究現(xiàn)狀,根據(jù)光線追跡方程,利用MatLab實(shí)現(xiàn)光源到漸變折射率透鏡(GRIN透鏡),再到接收面的光線軌跡計(jì)算。并利用物理場仿真軟件考證該算法的可行性。
[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.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM923.34
本文編號：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.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM923.34
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 李卓,朱崇恩,劉小鴻;固態(tài)發(fā)光器件前景光明[J];中國照明電器;2003年07期
，本文編號：2464634
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