Abstract
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.
| Original language | English |
|---|---|
| Title of host publication | LED and Display Technologies |
| Volume | 7852 |
| DOIs | |
| Publication status | Published - 2010 Dec 1 |
| Event | LED and Display Technologies - Beijing, China Duration: 2010 Oct 18 → 2010 Oct 19 |
Other
| Other | LED and Display Technologies |
|---|---|
| Country | China |
| City | Beijing |
| Period | 10-10-18 → 10-10-19 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
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Free-form lens design for LED indoor illumination. / Huang, Kuang Lung; Chen, Jin-Jia; Wang, Te Yuan; Huang, Li Lin.
LED and Display Technologies. Vol. 7852 2010. 78521D.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Free-form lens design for LED indoor illumination
AU - Huang, Kuang Lung
AU - Chen, Jin-Jia
AU - Wang, Te Yuan
AU - Huang, Li Lin
PY - 2010/12/1
Y1 - 2010/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=78751520815&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78751520815&partnerID=8YFLogxK
U2 - 10.1117/12.870647
DO - 10.1117/12.870647
M3 - Conference contribution
AN - SCOPUS:78751520815
SN - 9780819483829
VL - 7852
BT - LED and Display Technologies
ER -