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고동현(Dong Hyun Go),이윤철(Yoon Chul Lee) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.11
In this paper, we propose the optical system design for a medium sized LED marine lanterns which simplifies the multi-layer structure into a single structure. In order to satisfy the target fixed intensity(35,000cd) and vertical divergence(-2.5°∼-4.0°, +2.5°∼+4.0°), we use the total internal reflection collimator lens. And a Monte Carlo simulation has been utilized to optimize a condition of a LED package, TIR lens and outside lens. The computer simulation results indicated that this LED marine lanterns can produce of a fixed intensity(35,382cd) and vertical divergence(-3.1°∼+2.5°). Using the this optical system, we achieve the target value of LED lanterns.