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Optical Design for Development of LED Camping Lantern
New Phys.: Sae Mulli 2019; 69: 660~666
Published online June 28, 2019;
© 2019 New Physics: Sae Mulli.

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

1Department of Photonic Engineering, Chosun University, Gwangju 61452, Korea
2SoakN Co., Gwangju 61452, Korea
Correspondence to:
Received April 15, 2019; Revised May 10, 2019; Accepted May 10, 2019.
cc 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.
PACS numbers: 42.15.Dp, 42.15.Eq, 42.79.-e
Keywords: Optical design, LED lighting, LED lantern, Simulation

June 2019, 69 (6)
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