Optimal Design of Secondary Optics for Narrowing the Beam Angle of an LED Lamp with a Large-Area COB-type LED Package (대면적 COB-type LED 패키지를 포함한 LED 램프의 좁은 광속각 구현을 위한 2차 광학계 최적 설계)
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- Korean Journal of Optics and Photonics
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- v.25 no.2
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- pp.78-84
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- 2014