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Design of an Optical System for a Medium Luminous-Intensity Aircraft-Warning Light Using a LED Light Source and a Fresnel Lens
New Phys.: Sae Mulli 2018; 68: 1268~1274
Published online November 30, 2018;
© 2018 New Physics: Sae Mulli.

Hyeon Joon PARK1, Seong Won CHOI2, Jong Tae KIM*2

1 Department of LED Convergence Engineering, Pukyong National University, Busan 48513, Korea
2 Department of LED Convergence Engineering and Image Science and Display Engineering, Pukyong National University, Busan 48513, Korea
Correspondence to:
Received August 29, 2018; Revised October 12, 2018; Accepted October 17, 2018.
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.
Aircraft-warning lights are lights that are used to inform pilots in flight about the presence of buildings or dangerous objects. Currently, the light sources of most aircraft-warning lights have been replaced by light-emitting diodes (LEDs). However, the aircraft-warning lights that are installed do not meet the optical performance standards and may cause airplane collisions. Therefore, the use of such light poses a risk to aviation safety. In order to solve this problem, we designed a Fresnel lens with the same luminous intensity distribution ovef 360$^\circ$ direction; thus, we collimated the light beam from the LED light source with a narrow beam divergence angle in the form of an array of aspheric pieces. After that, we designed and simulated an aircraft-warning-light optical system with a center luminous intensity of 20,000 cd and a vertical divergence angle of 3$^\circ$ or more by optimizing the lens' tilt and the distance between the LED and the Fresnel lens.
PACS numbers: 42.15.Eq, 42.82.Bq
Keywords: Aircraft warning light, Fresnel lens, LED, Optical system design

February 2019, 69 (2)
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