Current Issue

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 33 , No. 1

[Paper List]


[ Papers ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 2, pp. 127-133
Abbreviation: J. Korean Soc. Manuf. Technol. Eng.
ISSN: 2508-5107 (Online)
Print publication date 15 Apr 2020
Received 21 Feb 2020 Revised 07 Apr 2020 Accepted 13 Apr 2020
DOI: https://doi.org/10.7735/ksmte.2020.29.2.127
균제도 구현을 위한 비구면 조명렌즈 설계 연구
김세민^a^{, *} ; 박정우^a ; 전언찬^b


Design of an Aspherical Illumination Lens for Realization of Uniformity
Se Min Kim^a^{, *} ; Joung Woo Park^a ; Eon Chan Jeon^b
aDepartment of Mechanical Engineering, Graduate School, Dong-A UNIV.
bDepartment of Mechanical Engineering, Dong-A UNIV.
Correspondence to : ^*Tel.: +82-51-200-6992 E-mail address: semin.kim75@gmail.com (Se Min Kim).

Abstract

This paper discusses the design and application of an aspherical lens to increase the light uniformity of light source modules having a light emitting diode (LED) on their bottom surface. Lenses are designed based on the light emission of the LED light source. However, as the actual light emission of the LEDs differs from the theoretical one, we modified the profile of the designed lens. Additionally, a study was conducted to increase the light uniformity through a light source simulation program using the modified profile. An aspherical lens was used in conjunction with a COB (Chip-On-Board) LED light source, resulting in an increase in the uniformity value to 0.93.


Keywords: Uniformity (Emin/Em (Uo)), Aspheric lens, Simulation, COB (Chip On Board), Fitting

References


1.	Kim, H. S., Park, K. Y., Jeon, J. U., 2005, Reverse Engineering of an Aspheric Lens Curvature, Journal of the Korean Society for Precision Engineering, 22:10 144-149.
2.	Ding, Y., Liu, X., Zheng, Z., Gu, P., 2008, Freeform LED Lens for Uniform Illumination, OPTICS EXPRESS, 16:17 12958-12966.
3.	Wang, K., Chen, F., Liu, Z., Luo, X., Liu, S., 2010, Design of Compact Freeform Lens for Application Specific Light-emitting Diode Packaging, OPTICS EXPRESS, 18:2 413-425.
4.	Chen, J., Wang, T., Huang, K., Liu, T., 2012, Freeform Lens Design for LED Collimating Illumination, OPTICS EXPRESS, 20:10 10984-10995.
5.	Wang, K., Liu, S., Chen, F., Qin, Z., Liu, Z., 2009, Freeform LED Lens for Rectangularly Prescribed Illumination, Journal of Optics A: Pure and Applied Optics, 11:10/10551 1-10.
6.	Hu, R., Luo, X., Zheng, H., Qin, Z., Gan, Z., 2012, Design of a Novel Freeform Lens for LED Uniform Illumination and Conformal Phosphor Coating, OPTICS EXPRESS, 20:13 13727-13737.
7.	Ma, D., Feng, Z., Liang, R., 2015, Freeform Illumination Lens Design Using Composite Ray Mapping, APPLIED OPTICS, 54:3 498-503.
8.	Ries, H., Muschaweck, J., 2002, Tailored Freeform Optical Surfaces, Journal of the Optical Society of America A, 19:3 590-595.
9.	Wu, R., Xu, L., Peng, L., Zhang, Y., Zheng, Z., 2013, Freeform Illumination Design: A Nonlinear Boundary Problem for the Elliptic Monge-Ampére Equation, Optics Letters, 38:2 229-231.
*10.*	Feng, Z., Luo, Y., Han, Y., 2010, Design of LED Freeform Optical System for Road Lighting with High Luminance_Illuminance Ratio, OPTICS EXPRESS, 18:21 22020-22031.
*11.*	Zhao, S., Wang, K., Chen, F., Wu, D., Liu, S., 2011, Lens Design of LED Searchlight of High Brightness and Distant Spot, Journal of the Optical Society of America A, 28:5 815-820.
*12.*	Moiseev, A., Doskolovich, L., Kazanskiy, N., 2011, Design of High-efficient Freeform LED Lens for Illumination of Elongated Rectangular Regions, OPTICS EXPRESS, 19:S3 A225-A233.
*13.*	Wang, K., Liu S., Chen, F., Liu, Z., Luo, X., 2009, Effect of Manufacturing Defects on Optical Performance of Discontinuous Freeform Lenses, OPTICS EXPRESS, 17:7 5457-5465.
*14.*	Chen, J. J., Huang, Z. Y., Liu, T. S., Tsai, M. D., Huang, K. L., 2015, Freeform Lens Design for Light-emitting Diode Uniform Illumination by Using a Method of Source-target Luminous Intensity Mapping, Applied Optics, 54:28 E146-E152.

Se Min Kim

Ph.D. candidate in the Department of Mechanical Engineering, Dong-A University.His research interest is Machining.

E-mail: semin.kim75@gmail.com

Joung Woo Park

Ph.D. in the Department of Mechanical Engineering, Dong-A University.His research interest is Optical science.

E-mail: jwnarada@hanmail.net

Eon Chan Jeon

Professor in the Department of Mechanical Engineering, Dong-A University.His research interest is Machining.

E-mail: ecjeon@dau.ac.kr