Optical Design and Engineering

Complementary optimization method of freeform lens design for uniform illumination with extended light-emitting diode sources

[+] Author Affiliations
Te-Yuan Wang, Jin-Jia Chen

National Changhua University of Education, Department of Electrical Engineering, 2 ShiDa Road, Changhua 50074, Taiwan

Kuang-Lung Huang

Mingdao University, Department of Materials Science and Energy Engineering, 369 Wen Hwa Road, Peetow, Changhua 52345, Taiwan

Chuen-Ching Wang

Kao Yuan University, Department of Information Technology, 1821 Jhongshan Road, Lujhu District, Kaohsiung 82151, Taiwan

Opt. Eng. 54(9), 095102 (Sep 10, 2015). doi:10.1117/1.OE.54.9.095102
History: Received June 3, 2015; Accepted August 10, 2015
Text Size: A A A

Abstract.  A freeform lens design method based on energy mapping and complementary optimization approaches is proposed to achieve uniform illumination with extended light-emitting diode (LED) sources. This method is primarily derived from a simple source–a target energy mapping approach, while a complementary illuminance on the target plane is introduced to optimize the primary axisymmetric lens so that the profile of the lens can be reformed to produce uniform illumination when applying an extended LED source. By using this optimization method, the illuminance uniformity and optical efficiency of the lens can be improved, respectively, from 0.56 to 0.85 and from 92.4% to 94.3% for an LED light source with chip diameter of 8.9 mm, while the aspect ratio of the lens clear aperture to the source diameter is only 3.8.

© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Te-Yuan Wang ; Jin-Jia Chen ; Kuang-Lung Huang and Chuen-Ching Wang
"Complementary optimization method of freeform lens design for uniform illumination with extended light-emitting diode sources", Opt. Eng. 54(9), 095102 (Sep 10, 2015). ; http://dx.doi.org/10.1117/1.OE.54.9.095102


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

PubMed Articles
Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.