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CLC number: O43

On-line Access: 2013-10-08

Received: 2013-01-31

Revision Accepted: 2013-06-15

Crosschecked: 2013-09-16

Cited: 1

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Journal of Zhejiang University SCIENCE C 2013 Vol.14 No.10 P.785-791

10.1631/jzus.C1300032


Ray targeting for optimizing smooth freeform surfaces for LED non-rotational illumination


Author(s):  Reng-mao Wu, Peng Liu, Ya-qin Zhang, Zhen-rong Zheng, Hai-feng Li, Xu Liu

Affiliation(s):  State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   wrmshu@163.com, zzr@zju.edu.cn

Key Words:  Illumination design, Freeform surface, Non-imaging optics, Computation methods


Reng-mao Wu, Peng Liu, Ya-qin Zhang, Zhen-rong Zheng, Hai-feng Li, Xu Liu. Ray targeting for optimizing smooth freeform surfaces for LED non-rotational illumination[J]. Journal of Zhejiang University Science C, 2013, 14(10): 785-791.

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author="Reng-mao Wu, Peng Liu, Ya-qin Zhang, Zhen-rong Zheng, Hai-feng Li, Xu Liu",
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doi="10.1631/jzus.C1300032"
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%A Reng-mao Wu
%A Peng Liu
%A Ya-qin Zhang
%A Zhen-rong Zheng
%A Hai-feng Li
%A Xu Liu
%J Journal of Zhejiang University SCIENCE C
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.C1300032

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T1 - Ray targeting for optimizing smooth freeform surfaces for LED non-rotational illumination
A1 - Reng-mao Wu
A1 - Peng Liu
A1 - Ya-qin Zhang
A1 - Zhen-rong Zheng
A1 - Hai-feng Li
A1 - Xu Liu
J0 - Journal of Zhejiang University Science C
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Y1 - 2013
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.C1300032


Abstract: 
We propose an effective optimization method for generating smooth freeform surfaces for light-emitting diode (LED) non-rotational illumination based on ray targeting. This method begins with a starting design and goes through two optimization steps. An initial estimate is determined using a partial differential equation (PDE) method and a variable separation mapping. In the first optimization step the merit function is developed with ray targeting to ensure the shape of the illumination pattern. The purpose of the second optimization is to further improve the optical performance by constructing the merit function with uniformity and efficiency. Smooth freeform reflective and refractive surfaces, which can produce a uniform rectangular illumination without rotational symmetry, are designed using this method. The results show that uniform rectangular illumination is achieved and that smooth freeform surfaces are obtained. With ray targeting, the design efficiency can be significantly enhanced, and excellent optical performance can be achieved.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1]Cvetkovic, A., Dross, O., Chaves, J., Benitez, P., Miñano, J.C., Mohedano, R., 2006. Etendue-preserving mixing and projection optics for high-luminance LEDs, applied to automotive headlamps. Opt. Expr., 14(26):13014-13020.

[2]Ding, Y., Liu, X., Zheng, Z.R., Gu, P.F., 2008. Freeform LED lens for uniform illumination. Opt. Expr., 16(17):12958-12966.

[3]Fournier, F.R., Cassarly, W.J., Rolland, J.P., 2010. Fast freeform reflector generation using source-target maps. Opt. Expr., 18(5):5295-5304.

[4]Koshel, R.J., 2005. Simplex optimization method for illumination design. Opt. Lett., 30(6):649-651.

[5]Luo, Y., Feng, Z.X., Han, Y.J., Li, H.T., 2010. Design of compact and smooth free-form optical system with uniform illuminance for LED source. Opt. Expr., 18(9):9055-9063.

[6]Michaelis, D., Schreiber, P., Bräuer, A., 2011. Cartesian oval representation of freeform optics in illumination systems. Opt. Lett., 36(6):918-920.

[7]Oliker, V., 2000. Mathematical Aspects of Design of Beam Shaping Surfaces in Geometrical Optics. In: Kirkilionis, M., Krömker, S., Rannacher, R., et al. (Eds.), Trends in Nonlinear Analysis. Springer Verlag, Germany, p.193-224.

[8]Oliker, V., 2007. Optical design of freeform two-mirror beam-shaping systems. J. Opt. Soc. Am. A, 24(12):3741-3752.

[9]Piegl, L., Tiller, W., 1997. The NURBS Books (2nd Ed.). Springer Verlag, Germany, p.100-101.

[10]Ries, H.R., Winston, R., 1994. Tailored edge-ray reflectors for illumination. J. Opt. Soc. Am. A, 11(4):1260-1264.

[11]Rubinstein, J., Wolansky, G., 2007. Intensity control with a free-form lens. J. Opt. Soc. Am. A, 24(2):463-469.

[12]Wang, K., Chen, F., Liu, Z.Y., Luo, X.B., Liu, S., 2010. Design of compact freeform lens for application specific light-emitting diode packaging. Opt. Expr., 18(2):413-425.

[13]Wu, R.M., Li, H.F., Zheng, Z.R., Liu, X., 2011. Freeform lens arrays for off-axis illumination in optical lithography system. Appl. Opt., 50(5):725-732.

[14]Wu, R.M., Li, H.F., Zheng, Z.R., Liu, X., 2012. Optimization design of irradiance array for LED uniform rectangular illumination. Appl. Opt., 51(13):2257-2263.

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