Free-form lens design for LED indoor illumination

Kuang Lung Huang, Jin-Jia Chen, Te Yuan Wang, Li Lin Huang

研究成果: Conference contribution

6 引文 斯高帕斯(Scopus)


This paper presents a free-form lens design for indoor illumination. The lens consists of a TIR (total internal reflection) surface on the sidewall, a refractive surface on the front side, and a concave surface on the rear side. The TIR surface is decorated with a free-form profile that light rays emitted from the LED with a larger spread angle to the axis will experience a total internal refection and output from the front refractive surface. While the central part of the front refractive surface has a convex surface that makes light rays closing to the optical axis more evenly distributed. The purpose of the rear concave surface is to let light rays emitted from the LED enter the lens straightforwardly. With this lens light rays from a Lambertian-type LED light source can be redistributed so that a uniform illumination can be achieved. The optical simulation results show that the measured optical efficiency is 75% while the uniformity is 80% on a target plane of 6-m diameter and at 2.5-m away.

主出版物標題LED and Display Technologies
出版狀態Published - 2010 十二月 1
事件LED and Display Technologies - Beijing, China
持續時間: 2010 十月 182010 十月 19


OtherLED and Display Technologies

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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    Huang, K. L., Chen, J-J., Wang, T. Y., & Huang, L. L. (2010). Free-form lens design for LED indoor illumination. 於 LED and Display Technologies (卷 7852). [78521D]