Free-form microlens for illumination applications

被引：50

作者：

Sun, Liwei ^{[1
,2
,3
]}

Jin, Shangzhong ^{[1
,2
,3
]}

Cen, Songyuan ^{[3
]}

机构：

[1] China Jiliang Univ, Coll Optoelect Engn, Zhejiang Prov Key Lab Modern Measurement Technol, Hangzhou 310018, Peoples R China

[2] China Jiliang Univ, Instrumentat Lab, Hangzhou 310018, Zhejiang, Peoples R China

[3] China Jiliang Univ, Coll Optoelect Engn, Lighting Res Ctr, Hangzhou 310018, Peoples R China

来源：

APPLIED OPTICS | 2009年 / 48卷 / 29期

关键词：

EDGE-RAY PRINCIPLE; NONIMAGING OPTICS; SURFACES; LENSES; DESIGN;

D O I：

10.1364/AO.48.005520

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

To abandon restrictions from the multiple and irregular radiation patterns of many existing LED products, the free-form microlens optics is designed based on Snell's law and the "edge-ray principle." This secondary optics can redistribute any LED radiation onto the target surfaces to achieve prescribed uniform illuminations without concern for the initial radiation patterns of LED sources. According to practical illumination requirements, the surface shape of the single free-form microlens can be calculated by using the ray tracing method and B-spline fitting. Some modules of free-form microlens optics were constructed to achieve rectangular illumination as well as other styles of illumination. The simulation results show that the illumination achieved has high uniformities and precise illuminating shapes as prescribed. The free-form microlens optics is very applicable in LED lighting, with cogent competitive advantages. (C) 2009 Optical Society of America

引用

页码：5520 / 5527

页数：8

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