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Article

Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel Lenses

1
Department of Information and Communication Engineering, Myongji University, 116 Myongji-ro, Cheoin-gu, Yongin, Gyeonggi-do 17058, Korea
2
Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 1000, Vietnam
3
Vietnam Academy of Science and Technology, Graduate University of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 11307, Vietnam
4
Vietnam Academy of Science and Technology, Center for High Technology Development, Hanoi 11307, Vietnam
5
Faculty of Electrical and Electronics Engineering and Phenikaa Institute for Advanced Study, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 12116, Vietnam
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2020, 10(9), 3257; https://doi.org/10.3390/app10093257
Submission received: 31 March 2020 / Revised: 29 April 2020 / Accepted: 4 May 2020 / Published: 7 May 2020
(This article belongs to the Collection Optical Design and Engineering)

Abstract

Redistribution of LED radiation in lighting is necessary in many applications. In this article, we propose a new optical component design for LED lighting to achieve a higher performance. The design consists of a commercial collimator and two linear Fresnel lenses. The LED radiation is collimated by a collimator and redistributed by double linear Fresnel lenses to create a square-shaped, uniform distribution. The linear Fresnel lenses design is based on Snell’s law and the “edge-ray principle”. The optical devices are made from poly methyl methacrylate (PMMA) using a high-speed computer numerical control (CNC) machine. The LED prototypes with complementary optics were measured, and the optical intensity distribution was evaluated. The numerical results showed we obtained a free-form lens that produced an illumination uniformity of 78% with an efficiency of 77%. We used the developed LED light sources for field experiments in agricultural lighting. The figures of these tests showed positive effects with control flowering criteria and advantages of harvested products in comparison with the conventional LED sources. This allows our approach in this paper to be considered as an alternative candidate for highly efficient and energy-saving LED lighting applications.
Keywords: geometric optical design; illumination design; light-emitting diodes; non-imaging optics geometric optical design; illumination design; light-emitting diodes; non-imaging optics
Graphical Abstract

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MDPI and ACS Style

Vu, H.; Kieu, N.M.; Gam, D.T.; Shin, S.; Tien, T.Q.; Vu, N.H. Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel Lenses. Appl. Sci. 2020, 10, 3257. https://doi.org/10.3390/app10093257

AMA Style

Vu H, Kieu NM, Gam DT, Shin S, Tien TQ, Vu NH. Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel Lenses. Applied Sciences. 2020; 10(9):3257. https://doi.org/10.3390/app10093257

Chicago/Turabian Style

Vu, Hoang, Ngoc Minh Kieu, Do Thi Gam, Seoyong Shin, Tran Quoc Tien, and Ngoc Hai Vu. 2020. "Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel Lenses" Applied Sciences 10, no. 9: 3257. https://doi.org/10.3390/app10093257

APA Style

Vu, H., Kieu, N. M., Gam, D. T., Shin, S., Tien, T. Q., & Vu, N. H. (2020). Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel Lenses. Applied Sciences, 10(9), 3257. https://doi.org/10.3390/app10093257

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