Design method of diffuse transmission free-form surface combined with collimation lens array

Abstract

Lighting-emitting diodes are widely applied in lighting systems, and diffusers are commonly used in systems for indirect illumination. In this paper, a design method of diffuse transmission free-form surface combined with collimation lens array is proposed. Based on the Lambertian characteristics of lighting-emitting diodes and the principle of collimation lenses, a mathematical model of diffuser with ideal diffuse transmission free-form surface is established. We propose a method of the preset collimation surface to connect the free-form surface and the collimation lens array, and derive the nonlinear algebraic equation of the diffuse transmission free-form surface according to the connection effect of the preset collimation surface. Then, solving the equation numerically by MATLAB, the profile of the diffuse transmission free-form surface is obtained. Finally, the non-sequential ray tracing software TracePro is used to simulate the irradiance distribution of the target plane. The results show better uniformity and higher efficiency comparing with the lighting system using diffuse transmission free-form surface alone and the traditional diffuse transmission lighting system.

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References

Schubert

Kim

. Solid-state light sources getting smart. Science 2005; 308: 1274–1278.

Kim

Schubert

. Transcending the replacement paradigm of solid-state lighting. Optics Express 2009; 16: 21835–21842.

Ding

Liu

Zheng

. Freeform LED lens for uniform illumination. Optics Express 2008; 16: 12958–12966.

Jiang

Lee

. Optical design of a freeform TIR lens for LED streetlight. Optik Stuttgart 2010; 121: 1761–1765.

Wang

Liu

Chen

. Freeform LED lens for rectangularly prescribed illumination. Journal of Optics A Pure & Applied Optics 2009; 11: 105501–105501.

Heng

Zhang

. Double freeform surfaces lens design for LED uniform illumination with high distance-height ratio. Optics & Laser Technology 2015; 73: 166–172.

Run H, Gan Z, Luo X. Design of double freeform-surface lens by distributing the deviation angle for light-emitting diode uniform illumination: International Conference on Electronic Packaging Technology, 2013. New York: IEEE.

Hua

Benítez

. Design of compact and ultra efficient aspherical lenses for extended Lambertian sources in two-dimensional geometry. Optics Express 2016; 24: 5078–5078.

Wen

Lin

. Improvement of illumination uniformity for LED flat panel light by using micro-secondary lens array. Optics Express 2012; 20: A788–A798.

10.

Liu

Wang

. Uniform illumination design by configuration of LEDs and optimization of LED lens for large-scale color-mixing applications. Applied Optics 2013; 52: 3998–3998.

11.

Lee

Moreno

Sun

. High-performance LED street lighting using microlens arrays. Optics Express 2013; 21: 10612–140621.

12.

Chiang

Hsu

Pan

. Design and demonstration of high efficiency anti-glare LED luminaires for indoor lighting. Optics Express 2015; 23: A15–A15.

13.

Zhu

Jin

Yang

. Design of diffuse reflection freeform surface for uniform illumination. Journal of Display Technology 2014; 10: 7–12.

14.

Zhu

Liu

Chen

. The design of diffuse reflective free-form surface for indirect illumination with high efficiency and uniformity. IEEE Photonics Journal 2015; 7: 1–10.

15.

Zhu

Yuan

. LED diffused transmission freeform surface design for uniform illumination. Journal of Optics 2019.

16.

Chen

. Bidirectional scattering distribution function by screen imaging synthesis. Optics Express 2015; 20: 1268–1280.

17.

Moreno I, Sun CC. LED array: where does far-field begin? Proceedings of SPIE the International Society for Optical Engineering, 2008; 7058: 70580R-70580R-9.