Abstract

We apply the previously proposed double pole ray mapping technique to design a non-symmetrical optical surface for generating an off-axis rectangular illumination pattern, which is aimed for road luminaire. This paper explores the methods to determine the edges of an unsymmetrical collection solid angle in the source space for different target requirements as well as the mechanical structures of optical surfaces. By sampling source grids within the defined region in a double pole coordinate system, we achieve nearly perfect mapping between source and target with a high uniformity for the off-axis rectangular illumination pattern. The testing result of the prototyped free-form lens also shows good illumination performance, which is consistent with our simulation result. Besides, the tolerance analysis of the luminaire system is performed to understand the sensitivity of the LED’s position on illumination performance.

© 2017 Optical Society of America

Catadioptric freeform optical system design for LED off-axis road illumination applications

Zhengbo Zhu, Donglin Ma, Qiaomu Hu, Yongqian Tang, and Rongguang Liang
Opt. Express 26(2) A54-A65 (2018)

Designing an LED luminaire with balance between uniformity of luminance and illuminance for non-Lambertian road surfaces

Tun-Chien Teng, Wen-Shing Sun, and Jhih-Li Lin
Appl. Opt. 56(10) 2604-2613 (2017)

Tailoring freeform illumination optics in a double-pole coordinate system

Donglin Ma, Zexin Feng, and Rongguang Liang
Appl. Opt. 54(9) 2395-2399 (2015)

Optimal design of optical system for LED road lighting with high illuminance and luminance uniformity

Xiaojia Hu and Keyuan Qian
Appl. Opt. 52(24) 5888-5893 (2013)

Design of LED freeform optical system for road lighting with high luminance/illuminance ratio

Zexin Feng, Yi Luo, and Yanjun Han
Opt. Express 18(21) 22020-22031 (2010)