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

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Development of Surface-mount-type Crown-shaped Lens for Reducing Glare Effect of Light-emitting Diode Light Source

LED 광원의 눈부심 현상을 감소시키기 위한 표면 실장형 CR 렌즈 개발

  • Park, Yong Min (Department of Mechanical and Mechatronics Engineering, Kangwon National University) ;
  • Bang, Hyun Chul (Department of Mechanical and Mechatronics Engineering, Kangwon National University) ;
  • Seo, Young Ho (Department of Mechanical and Mechatronics Engineering, Kangwon National University) ;
  • Kim, Byeong Hee (Department of Mechanical and Mechatronics Engineering, Kangwon National University)
  • Received : 2014.01.06
  • Accepted : 2014.02.14
  • Published : 2014.02.15
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Abstract

This paper introduces the use of a crown-shaped (CR) lens to effectively diffuse the light from a light-emitting diode (LED) without any loss in the light intensity, in contrast to polymer-bulb-type diffusers. The diffusion lens was designed based on the Snell's law, which describes the physical path of a ray passing through the boundary between different media. CR lenses were fabricated by polydimethylsiloxane (PDMS) casting and UV-embossing processes, which used a pre-designed metal mold and UV-curable resin, respectively. Through experiments and optical evaluations, it was verified that the newly proposed CR lens not only decreased the vertical light strength and glare effect from an LED light source but also improved the diffusion characteristics while maintaining the quality of the LED's light intensity.

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References

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