Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Fabrication of Silicone Resin TIR Linear Lens and Development of 365 nm Wavelength UV LED Light Source

실리콘 수지 TIR 선형 렌즈 제작 및 365 nm 파장대역 UV LED 조사기 광원 개발

  • Sung, Jun Ho (Department of Electronic Engineering, Sunmoon University) ;
  • Yu, Soon Jae (Department of Electronic Engineering, Sunmoon University) ;
  • Anil, Kawan (Department of Electronic Engineering, Sunmoon University)
  • 성준호 (선문대학교 전자공학과 광전자반도체연구실) ;
  • 유순재 (선문대학교 전자공학과 광전자반도체연구실) ;
  • Received : 2018.05.04
  • Accepted : 2018.06.28
  • Published : 2018.09.01
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Abstract

A total internal reflection (TIR) linear lens of size $190(W){\times}5(D){\times}2.1(H)mm^3$ has a directivity of $25^{\circ}$ and was made of a polydimethysiloxane (PDMS) silicone resin with a refractive index of 1.4 and a transmittance of 93% at 365 nm UV wavelength. A light source with a size of $190{\times}25.5mm^2$ was fabricated by installing a TIR linear lens on a chip on board (COB) type LED module mounted with a $1.1{\times}1.1mm^2$ size UV LED. The optical characteristics of the light source showed a maximum irradiation density of $3,840mW/cm^2$ at a working distance of 5 mm and a high uniformity of 91.6% over a $150{\times}25mm^2$ irradiation area. The thermal characteristics of the light source were measured at a supply current of 500 mA. The saturation temperature was reached after 30 min of operation, and measured to be $95^{\circ}C$.

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References

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