Development of multiple-surface optical elements for road lighting.

The development of LED secondary optics for road illumination is quite a challenging problem. Optical elements developed for this kind of application should have maximal efficiency, provide high luminance and illuminance uniformity, and meet many other specific requirements. Here, we demonstrate that the usage of the supporting quadric method modification enables generating free-form optical solution satisfying all these requirements perfectly. As an example, two optical elements for different roadway types are computed, manufactured by injection molding, and then measured in a photometry bench. Experimental data demonstrate that the obtained light distributions meet ME1 class requirements of EN 13201 standard. The obtained directivity patterns are universal and provide high performance with different configurations of luminaires' arrangement: the ratio of pole altitude to distance can vary from 2.5 up to 3.6.

[1]  Mali Gong,et al.  Designing double freeform optical surfaces for controlling both irradiance and wavefront. , 2013, Optics express.

[2]  Ching-Cherng Sun,et al.  High-performance LED street lighting using microlens arrays. , 2013, Optics express.

[3]  Vladimir Oliker,et al.  Computational algorithms for constructing reflectors , 2003 .

[4]  Leonid L Doskolovich,et al.  Design of LED refractive optics with predetermined balance of ray deflection angles between inner and outer surfaces. , 2015, Optics express.

[5]  Leonid L Doskolovich,et al.  Design of high-efficient freeform LED lens for illumination of elongated rectangular regions. , 2011, Optics express.

[6]  L. Doskolovich,et al.  Design of efficient LED optics with two free-form surfaces. , 2014, Optics express.

[7]  Julio Chaves,et al.  Simultaneous multiple surface optical design method in three dimensions , 2004 .

[8]  Jacob Rubinstein,et al.  Supporting quadric method in optical design of freeform lenses for illumination control of a collimated light , 2015, Adv. Appl. Math..

[9]  Xiaobing Luo,et al.  Design of double freeform-surface lens for LED uniform illumination with minimum Fresnel losses , 2013 .

[10]  Jochen Stollenwerk,et al.  High resolution irradiance tailoring using multiple freeform surfaces. , 2013, Optics express.

[11]  Xiaojia Hu,et al.  Optimal design of optical system for LED road lighting with high illuminance and luminance uniformity. , 2013, Applied optics.

[12]  Jochen Stollenwerk,et al.  Algorithm for irradiance tailoring using multiple freeform optical surfaces. , 2012, Optics express.

[13]  Sławomir Zalewski.  Design of optical systems for LED road luminaires. , 2015, Applied optics.

[14]  Yi Luo,et al.  Discontinuous free-form lens design for prescribed irradiance. , 2007, Applied optics.