Abstract

A method using a freeform surface lens for LED secondary optic design is proposed in this paper. By Snell’s Law, the differential equations are given to build the relationship between the normal direction of a freeform surface and its input/output ray vectors. Runge–Kutta formulas are used to calculate the differential equations to design the freeform surface. Moreover, the optical model for uniform illumination is simulated and optical performance is analyzed. A practical freeform surface lens for LED uniform illumination is fabricated using an injection molding method. By the process, our system demonstrates a uniform illumination with a divergence half-angle of 6° and an efficiency of 78.6%.

© 2009 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Freeform LED lens for uniform illumination

Yi Ding, Xu Liu, Zhen-rong Zheng, and Pei-fu Gu
Opt. Express 16(17) 12958-12966 (2008)

Ultra-compact LED lens with double freeform surfaces for uniform illumination

Shixiong Hu, Kang Du, Ting Mei, Lei Wan, and Ning Zhu
Opt. Express 23(16) 20350-20355 (2015)

Design of a novel freeform lens for LED uniform illumination and conformal phosphor coating

Run Hu, Xiaobing Luo, Huai Zheng, Zong Qin, Zhiqiang Gan, Bulong Wu, and Sheng Liu
Opt. Express 20(13) 13727-13737 (2012)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (15)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (15)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription