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Optical design of rectangular illumination with freeform lenses for the application of LED road lighting

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Abstract

We present a freeform lens for application to light-emitting diodes (LED) road lighting. We propose a simple source–target luminous intensity mapping method based on Snell’s law and geometric-optics analysis. We calculated different contours of cross-sections to construct a freeform lens with a smooth surface. The computer simulation results show that the lighting performance of a single freeform lens is not sufficient for road lighting. For the road lamp simulation, we adopted an oval arrangement of freeform lenses on a printed circuit board. In addition, we performed tolerance analysis to determine the tolerance limits of manufacturing and installation errors. A road lamp at a height of 12 m can create rectangular illumination with an area of 40 m × 12 m, 69.7% uniformity, and average illuminance of 24.6 lux. This lighting performance can fully comply with the urban road lighting design standard.

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Acknowledgements

This work was supported by Science and Technology Innovation Foundation of Shenzhen (Nos. ZDSYS201604211455119, and JSGG20160229115108346).

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Authors and Affiliations

  1. China Aerospace Academy of Systems Science and Engineering, Beijing, 100048, China

    Chunyun Xu

  2. Joint Research Center for Optomechatronics Engineering, School of Optoelectronics, Beijing Institute of Technology, Beijing, 100081, China

    Chunyun Xu, Haobo Cheng & Yunpeng Feng

  3. Shenzhen Research Institute, Beijing Institute of Technology, Shenzhen, 518057, China

    Chunyun Xu, Haobo Cheng & Yunpeng Feng

Authors
  1. Chunyun Xu
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  2. Haobo Cheng
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  3. Yunpeng Feng
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Corresponding author

Correspondence to Haobo Cheng.

Additional information

Chunyun Xu is currently an engineer at the China Aerospace Academy of Systems Science and Engineering. She received her Ph.D. degree at the Beijing Institute of Technology. Her present research work involves optical system design.

Haobo Cheng is currently a Professor and doctoral supervisor at the Beijing Institute of Technology. He received his Ph.D. degree at the Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences. He is also the dean of a research institute in Shenzhen and director of the joint research center for optomechatronics engineering. His present research work involves precision and ultra-precision manufacturing and testing.

Yunpeng Feng is currently a Master's degree supervisor at the Beijing Institute of Technology. He received his Ph.D. degree at the Beijing Institute of Technology and works at the joint research center for opto-mechatronics engineering. His present research work involves optical manufacturing and testing.

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Xu, C., Cheng, H. & Feng, Y. Optical design of rectangular illumination with freeform lenses for the application of LED road lighting. Front. Optoelectron. 10, 353–362 (2017). https://doi.org/10.1007/s12200-017-0707-7

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  • DOI: https://doi.org/10.1007/s12200-017-0707-7

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