Abstract
In this work, a design method of a freeform-Fresnel composite surface lens is proposed, which can be applied on LED lighting optics to realize uniform and collimated light output in a single lens element. The lower lens surface is of freeform type, which transforms the light distribution from the LED sources to a uniform one, and the upper lens surface is of the Fresnel type, which further transforms the lights to a collimated beam. Through the optimization of lens parameters, the obtained lens has the advantages of compact volume, wide acceptance angle, high light extraction efficiency, and high design accuracy.
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
Xiong Hui, Jian Zhang, Jiajia Gao, and Haobo Lin
Appl. Opt. 57(29) 8686-8691 (2018)
Zheng Zhenrong, Hao Xiang, and Liu Xu
Appl. Opt. 48(35) 6627-6634 (2009)
Shixiong Hu, Kang Du, Ting Mei, Lei Wan, and Ning Zhu
Opt. Express 23(16) 20350-20355 (2015)