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Proceedings Paper

The design of optical module of LED street lamp with non-axial symmetrical reflector
Author(s): Ming-Jun Lu; Chi-An Chen; Yi-Yung Chen; Allen Jong-Woei Whang
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Paper Abstract

In recently, many research focus on the LED applications for environmental protection so a number of LED street lamps are presented. Although LED has many advantages for environmental protection, its special optical characteristics, such as intensity distribution, always limit the advantages in many applications. Therefore, we always need to do the secondary optical design for LED street lamp to replace the traditional optical designs that are designed for high-pressure sodium lamps and mercury lamps. According to the situation, we design an optical module of LED street lamp with LEDs and secondary optical design. First, the LEDs are placed on freeform reflector for the specific illuminated conditions. We design the optical module of street lamp with the two conditions that include the uniformity and the ratio of length to width in the illuminated area and without any light pollution. According to the simulation with the designed optical module, the uniformity in the illuminated area is about 0.6 that is better than the general condition, 0.3, and the ratio of length to width in the illuminated area is 3:1 in which the length is 30 meters and the width is 10 meters. Therefore, the design could let LED street lamp fits the two conditions, uniformity and ratio in the illuminated area.

Paper Details

Date Published: 14 May 2010
PDF: 8 pages
Proc. SPIE 7717, Optical Modelling and Design, 771713 (14 May 2010); doi: 10.1117/12.853509
Show Author Affiliations
Ming-Jun Lu, National Taiwan Univ. of Science and Technology (Taiwan)
Chi-An Chen, National Taiwan Univ. of Science and Technology (Taiwan)
Yi-Yung Chen, National Taiwan Univ. of Science and Technology (Taiwan)
Allen Jong-Woei Whang, National Taiwan Univ. of Science and Technology (Taiwan)


Published in SPIE Proceedings Vol. 7717:
Optical Modelling and Design
Frank Wyrowski; John T. Sheridan; Jani Tervo; Youri Meuret, Editor(s)

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