Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel Lenses
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...
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MDPI AG
2020-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/9/3257 |
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| author | Hoang Vu Ngoc Minh Kieu Do Thi Gam Seoyong Shin Tran Quoc Tien Ngoc Hai Vu |
| author_facet | Hoang Vu Ngoc Minh Kieu Do Thi Gam Seoyong Shin Tran Quoc Tien Ngoc Hai Vu |
| author_sort | Hoang Vu |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T19:59:22Z |
| format | Article |
| id | doaj.art-6bf1761d06ce4e4ca6f7b736a9f789bf |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T19:59:22Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-6bf1761d06ce4e4ca6f7b736a9f789bf2023-11-19T23:42:29ZengMDPI AGApplied Sciences2076-34172020-05-01109325710.3390/app10093257Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel LensesHoang Vu0Ngoc Minh Kieu1Do Thi Gam2Seoyong Shin3Tran Quoc Tien4Ngoc Hai Vu5Department of Information and Communication Engineering, Myongji University, 116 Myongji-ro, Cheoin-gu, Yongin, Gyeonggi-do 17058, KoreaInstitute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 1000, VietnamVietnam Academy of Science and Technology, Center for High Technology Development, Hanoi 11307, VietnamDepartment of Information and Communication Engineering, Myongji University, 116 Myongji-ro, Cheoin-gu, Yongin, Gyeonggi-do 17058, KoreaInstitute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 1000, VietnamFaculty of Electrical and Electronics Engineering and Phenikaa Institute for Advanced Study, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 12116, VietnamRedistribution 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.https://www.mdpi.com/2076-3417/10/9/3257geometric optical designillumination designlight-emitting diodesnon-imaging optics |
| spellingShingle | Hoang Vu Ngoc Minh Kieu Do Thi Gam Seoyong Shin Tran Quoc Tien Ngoc Hai Vu Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel Lenses Applied Sciences geometric optical design illumination design light-emitting diodes non-imaging optics |
| title | Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel Lenses |
| title_full | Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel Lenses |
| title_fullStr | Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel Lenses |
| title_full_unstemmed | Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel Lenses |
| title_short | Design and Evaluation of Uniform LED Illumination Based on Double Linear Fresnel Lenses |
| title_sort | design and evaluation of uniform led illumination based on double linear fresnel lenses |
| topic | geometric optical design illumination design light-emitting diodes non-imaging optics |
| url | https://www.mdpi.com/2076-3417/10/9/3257 |
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