26 September 2014 Optical design of low glare luminaire applied for tunnel light
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In this study, a low glare and high-efficient tunnel lighting design which consists of a cluster light-emitting diode and a free-form lens is presented. Most of the energy emitted from the proposed luminaire is transmitted onto the surface of the road in front of drivers, and the probability that the energy is emitted directly into drivers’ eyes is low. Compared with traditional fluorescent lamps, the proposed luminaire, of which the optical utilization factor, optical efficiency, and uniformity are, respectively, 44%, 92.5%, and 0.72, performs favorably in traffic safety, energy saving, and glare reduction.
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M. S. Tsai, M. S. Tsai, X. H. Lee, X. H. Lee, Y. C. Lo, Y. C. Lo, C. C. Sun, C. C. Sun, "Optical design of low glare luminaire applied for tunnel light", Proc. SPIE 9192, Current Developments in Lens Design and Optical Engineering XV, 91920T (26 September 2014); doi: 10.1117/12.2060362; https://doi.org/10.1117/12.2060362

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