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LED Uniform Illumination Using Double Linear Fresnel Lenses for Energy Saving

Author

Listed:
  • Ngoc Hai Vu

    (Department of Information and Communication Engineering, Myongji University, San 38-2 Nam-dong, Yongin 449-728, Korea)

  • Thanh Tuan Pham

    (Department of Information and Communication Engineering, Myongji University, San 38-2 Nam-dong, Yongin 449-728, Korea)

  • Seoyong Shin

    (Department of Information and Communication Engineering, Myongji University, San 38-2 Nam-dong, Yongin 449-728, Korea)

Abstract

We present a linear Fresnel lens design for light-emitting diode (LED) uniform illumination applications. The LED source is an array of LEDs. An array of collimating lens is applied to collimate output from the LED array. Two linear Fresnel lenses are used to redistribute the collimated beam along two dimensions in the illumination area. Collimating lens and linear Fresnel lens surfaces are calculated by geometrical optics and nonimaging optics. The collimated beam output from the collimating lens array is divided into many fragments. Each fragment is refracted by a segment of Fresnel lens and distributed over the illumination area, so that the total beam can be distributed to the illumination target uniformly. The simulation results show that this design has a compact structure, high optical efficiency of 82% and good uniformity of 76.9%. Some consideration of the energy savings and optical performance are discussed by comparison with other typical light sources. The results show that our proposed LED lighting system can reduce energy consumption five-times in comparison to using a conventional fluorescent lamp. Our research is a strong candidate for low cost, energy savings for indoor and outdoor lighting applications.

Suggested Citation

  • Ngoc Hai Vu & Thanh Tuan Pham & Seoyong Shin, 2017. "LED Uniform Illumination Using Double Linear Fresnel Lenses for Energy Saving," Energies, MDPI, vol. 10(12), pages 1-15, December.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:12:p:2091-:d:122405
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    Citations

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    Cited by:

    1. Marcin Leśko & Antoni Różowicz & Henryk Wachta & Sebastian Różowicz, 2020. "Adaptive Luminaire with Variable Luminous Intensity Distribution," Energies, MDPI, vol. 13(3), pages 1-22, February.
    2. Yi-Chieh Hsu & Jing-Yuan Lin & Charlie Chung-Ping Chen, 2018. "Area-Saving and High-Efficiency RGB LED Driver with Adaptive Driving Voltage and Energy-Saving Technique," Energies, MDPI, vol. 11(6), pages 1-12, June.
    3. Thanh Tuan Pham & Ngoc Hai Vu & Seoyong Shin, 2019. "Novel Design of Primary Optical Elements Based on a Linear Fresnel Lens for Concentrator Photovoltaic Technology," Energies, MDPI, vol. 12(7), pages 1-20, March.

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