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High-performance LED street lighting using microlens arrays.

Xuan-Hao Lee1, Ivan Moreno, Ching-Cherng Sun

  • 1Institute of Lighting and Display Science/Department of Optics and Photonics, National Central University, Chung-Li 320, Taiwan.

Optics Express
|May 15, 2013
PubMed
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This study presents an efficient LED street lamp with high optical efficiency and uniformity. The innovative design uses TIR lenses and a microlens sheet for superior light distribution and reduced glare.

Area of Science:

  • Optics and Photonics
  • Illumination Engineering

Background:

  • Traditional street lighting often suffers from low efficiency and poor light distribution.
  • Minimizing glare and maximizing uniformity are critical for effective road illumination.

Purpose of the Study:

  • To present an efficient LED street lamp with high optical quality.
  • To achieve uniform street illumination with low glare.

Main Methods:

  • Utilized a reflective box with a cluster of LEDs and Total Internal Reflection (TIR) lenses.
  • Incorporated a microlens sheet for uniform light distribution.
  • Verified design feasibility using Monte Carlo ray-tracing simulations.

Main Results:

  • The luminaire demonstrated high optical efficiency and a high optical utilization factor.

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  • Achieved uniform street illumination with significantly reduced glare.
  • Simulations confirmed feasibility for central, zigzag, and single-side pole arrangements.

    • Conclusions:

    • The presented LED luminaire design offers a simple yet effective solution for high-quality street lighting.
    • The combination of TIR lenses and a microlens sheet optimizes light distribution and efficiency.
    • This design is a viable option for various road lighting configurations.