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

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Analysis of Performance on Asymmetric LED Lens Design Using Three-Dimensional Free-Form Surface Expression

3차원 자유곡면식을 이용한 LED 비대칭 렌즈 설계 및 성능 비교 분석

  • Lee, Chang Soo (Graduate School of Knowledge-based Technology & Energy (Opto-Nanotronics), Korea Polytechnic University) ;
  • Lee, Soo Young (Graduate School of Knowledge-based Technology & Energy (Opto-Nanotronics), Korea Polytechnic University) ;
  • Hyun, Dong Hoon (Graduate School of Knowledge-based Technology & Energy (Opto-Nanotronics), Korea Polytechnic University)
  • Received : 2017.04.06
  • Accepted : 2017.06.01
  • Published : 2017.06.15
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Abstract

The exit surface of a lens is designed using a three-dimensional free-form expression in order to easily modify a curved surface. This enables the design of numerical values and mathematical things using three-dimensional free-form expression, and enhances precision because it can be fine-tuned via numerical control. The standard of "Classification of Luminaire Light Distribution" for outdoor lighting fixtures by IESNA is adopted in order to examine the correlation between three-dimensional free-form surface expression and lighting performance. The variation of light distribution type and range is analyzed using the values of maximum light intensity and 50% light intensity. The actual tolerance occurs owing to parameters such as the thickness of the lens, the distance between LEDs, and the movement of the center of the incident surface; the effects of changes in these parameters on the performance are compared and analyzed.

Keywords

References

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