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Optical design of rectangular illumination with freeform lenses for the application of LED road lighting

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Abstract

We present a freeform lens for application to light-emitting diodes (LED) road lighting. We propose a simple source-target luminous intensity mapping method based on Snell’s law and geometric-optics analysis. We calculated different contours of cross-sections to construct a freeform lens with a smooth surface. The computer simulation results show that the lighting performance of a single freeform lens is not sufficient for road lighting. For the road lamp simulation, we adopted an oval arrangement of freeform lenses on a printed circuit board. In addition, we performed tolerance analysis to determine the tolerance limits of manufacturing and installation errors. A road lamp at a height of 12 m can create rectangular illumination with an area of 40 m × 12 m, 69.7% uniformity, and average illuminance of 24.6 lux. This lighting performance can fully comply with the urban road lighting design standard.

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DOI:doi 10.1007/s12200-017-0707-7

所属栏目:RESEARCH ARTICLE

基金项目:This work was supported by Science and TechnologyInnovation Foundation of Shenzhen (Nos. ZDSYS201604211455119, andJSGG20160229115108346).

收稿日期:2017-02-24

修改稿日期:2017-07-01

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Chunyun XU:China Aerospace Academy of Systems Science and Engineering, Beijing 100048, ChinaJoint Research Center for Optomechatronics Engineering, School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, ChinaShenzhen Research Institute, Beijing Institute of Technology, Shenzhen 518057, China
Haobo CHENG:Joint Research Center for Optomechatronics Engineering, School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, ChinaShenzhen Research Institute, Beijing Institute of Technology, Shenzhen 518057, China
Yunpeng FENG:Joint Research Center for Optomechatronics Engineering, School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, ChinaShenzhen Research Institute, Beijing Institute of Technology, Shenzhen 518057, China

联系人作者:Haobo CHENG(chenghaobo@tsinghua.org.cn)

备注:Chunyun Xu is currently an engineer at the China Aerospace Academy of Systems Science and Engineering. She received her Ph.D. degree at the Beijing Institute of Technology. Her present research work involves optical system design.

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引用该论文

Chunyun XU,Haobo CHENG,Yunpeng FENG. Optical design of rectangular illumination with freeform lenses for the application of LED road lighting[J]. Frontiers of Optoelectronics, 2017, 10(4): 353-362

Chunyun XU,Haobo CHENG,Yunpeng FENG. Optical design of rectangular illumination with freeform lenses for the application of LED road lighting[J]. Frontiers of Optoelectronics, 2017, 10(4): 353-362

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