npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041


Research Paper

New Phys.: Sae Mulli 2019; 69: 660-666

Published online June 28, 2019

Copyright © New Physics: Sae Mulli.

Optical Design for Development of LED Camping Lantern

캠핑용 LED 랜턴 개발을 위한 광학 설계에 관한 연구

Seung-Eun KIM1, Jong-Rak PARK1, Yu-Sin KIM2*

1Department of Photonic Engineering, Chosun University, Gwangju 61452, Korea

2SoakN Co., Gwangju 61452, Korea


Received: April 15, 2019; Revised: May 10, 2019; Accepted: May 10, 2019

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


We used illumination design software to perform optical simulations of a light-emitting diode (LED) camping lantern. One high-power LED chip was assumed to be employed as the light source of the LED camping lantern. A cone geometry was chosen as the light-deflecting structure for the light source, and two types of cone structures (hollow relief and relief) were investigated in terms of the optical efficiency (OE), the average illuminance (AI), and the uniformity of illuminance distribution (UID). For the hollow relief type, optimal optical performances (OE: 23.30%, AI: 69.91 lx, UID: 60.04%) were obtained when the diameter and the height of the structure were 8 and 6 mm, respectively. For the relief type, optimal optical performances (OE: 35.36%, AI: 106.16 lx, UID: 52.71%) were obtained when the diameter and the height were 6 and 6 mm, respectively. In addition, the feasibility of scaling up the optical output was considered by increasing the number of LED chip-and-cone pairs. We found that for both types of light-deflecting cones, the AI increased in proportion to the number of LED chip-and-cone pairs, whereas the OE and the UID were not altered.

Keywords: Optical design, LED lighting, LED lantern, Simulation

본 논문에서는 캠핑용 발광다이오드(light-emitting diode, LED) 랜턴에 대한 광학 시뮬레이션을 수행하였다. 광원으로는 한 개의 파워 LED 칩이 사용되는 것으로 가정하였고 광확산을 위한 구조물로는 원뿔체를 채택하였다. 음각 및 양각의 두 가지 확산 구조체에 대한 시뮬레이션을 수행하였으며, 구조체의 형상 변화에 따른 광효율, 평균조도 및 조도분포 균일도 변화에 대해 조사하였다. 음각 원뿔체의 경우 지름과 높이가 각각 8 mm와 6 mm일 때 최적의 광학성능(광효율: 23.30%, 평균조도: 69.91 lx, 조도분포 균일도: 60.04\%)을 보였으며, 양각 원뿔체의 경우 지름과 높이가 모두 6 mm일 때 최적의 광학성능(광효율: 35.36%, 평균조도: 106.16 lx, 조도분포 균일도: 52.71%)을 보였다. LED 랜턴의 광출력 확장 가능성을 알아보기 위해 LED 칩과 원뿔체 쌍의 개수를 증가시켜 광학 시뮬레이션을 수행하였다. 음각 및 양각 원뿔체 두 경우 모두 평균조도는 LED 칩과 원뿔체 쌍의 개수에 정비례하여 증가하였고, 광효율 및 조도분포 균일도는 거의 변화하지 않았다.

Keywords: 광학설계, LED 조명, LED 랜턴, 전산모사

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