LED beam shaping lens based on the near-field illumination.
LED beam shaping lens based on the near-field illumination.
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DOI：
10.1364/oe.17.023449
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发表时间：
2009-12
期刊：
影响因子：
3.8
通讯作者：
Jae-Young Joo;Chang Seog Kang;Soon-Sub Park;Sun-Kyu Lee
中科院分区：
文献类型：
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作者：
Jae-Young Joo;Chang Seog Kang;Soon-Sub Park;Sun-Kyu Lee
提出了一种基于氮化镓发光二极管（GaN LED）精确光学模型的近场光束整形新方法。利用蒙特卡罗光线追迹模拟计算了LED顶部附近的光子空间分布。通过分析近场的光线数据，小型化的透镜的轮廓被创建和加工与非球面表面和全内反射（TIR）菲涅耳小平面。原型透镜将LED的视角从150度减小到17.5度，同时将峰值发光强度增加10倍。所提出的具有CSP LED的透镜阵列展示了近场超薄均匀照明的可行性。
This paper presents a novel method in near-field beam shaping based on the precise optical modeling of a gallium nitride light-emitting diode (GaN LED). A Monte Carlo ray tracing simulation has been utilized to calculate the spatial photon distribution near the LED's top. By analyzing the ray data in near-field, the miniaturized lens profile is created and machined with aspherical surfaces and total internal reflection (TIR) Fresnel facets. The prototype lens reduce the viewing angle of the LED from 150 degrees to 17.5 degrees at full width half maximum (FWHM) while increasing the peak luminous intensity 10 times. The array of proposed lens with CSP LEDs exhibits feasibility of ultra thin uniform illumination in near-field.