Journal of the Korean Society of Manufacturing Technology Engineers (한국생산제조학회지)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Study on Design Parameters of LED Secondary Lens with Very Close Range

초근접 LED 2차 렌즈의 설계 변수에 관한 연구

  • Kim, Jang Yun (Department of Nano-Optical Engineering, Korea Polytechnic University) ;
  • Hyun, Dong Hoon (Department of Nano-Optical Engineering, Korea Polytechnic University) ;
  • Hong, Cheol Ui (Department of Nano-Optical Engineering, Korea Polytechnic University)
  • Received : 2014.11.03
  • Accepted : 2015.01.22
  • Published : 2015.04.15
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Abstract

In this paper, the performance of a system was analyzed according to the design parameters of a LED secondary lens that can be applied at a very close range, e.g., for direct lighting or display systems. We designed the secondary lens of the very-close-range LED using an aspheric equation and analyzed its performance-particularly the angle of the beam spread, central luminous intensity, and light uniformity-with respect to the thickness of lens, radius, conic constant, and asphericity (4th). Our analysis shows that four parameters affect the performance. The simulation results indicate an optimal thickness of 1 mm and show that a larger radius yields higher performance. The optimal range for the conic constant was determined as -1.21 to -1.25, the optimal range for the asphericity was determined as 0.0047xx to 0.0049xx (4th).

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References

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