Secondary light distribution design for LED street light

Author

Yang, Kai ; Song, Jidong ; Chen, Yuqing ; Lin, Bin

Author_Institution

Coll. of Opt. & Electron. Technol., China JiLiang Univ., Hangzhou, China

Volume

2

fYear

2011

fDate

29-31 July 2011

Abstract

The secondary optics design is a critical issue for the light distribution and output efficiency of the LED street light. Traditional light distribution methods are simple but difficult to get high energy efficiency and illumination uniformity together. In this paper, the adoption of the unsymmetrical freeform surface lens can obtain a rectangular light distribution pattern just cover the road with little waste of light. In this paper, an unsymmetrical freeform optic lens is designed which is combining with theory of non-imaging optics and freeform surface. The result shows that light energy efficiency and illumination uniformity under the freeform surface lens can reach 81% and 77% respectively.

Keywords

lenses; light emitting diodes; street lighting; LED street light; energy efficiency; light emitting diode; nonimaging optics theory; rectangular light distribution pattern; secondary light distribution design; secondary optics design; uniformity illumination; unsymmetrical freeform surface lens design; Algorithm design and analysis; Lenses; Light emitting diodes; LED street light; energy efficiency; freeform surface; illumination uniformity;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics and Optoelectronics (ICEOE), 2011 International Conference on

Conference_Location

Dalian

Print_ISBN

978-1-61284-275-2

Type

conf

DOI

10.1109/ICEOE.2011.6013261

Filename

6013261