Publisher : The Korean Institute of Electrical and Electronic Material Engineers
DOI : 10.4313/TEEM.2015.16.4.201
Title & Authors
Study on the Design of a High Condensing LED Searchlight Kim, Tae-Seong; Kim, Jin-Wook; Kim, Sun-Jae; Kil, Gyung-Suk;
This paper dealt with the condensing technology of an LED light source that uses a parabolic reflector to replace a searchlight equipped with a xenon lamp. A ray-tracing simulation was conducted to analyze the influence of the diameter of the reflector and the size of the light source on light condensing. The combination of a parabolic reflector with a diameter of 620 mm and a focal distance of 220 mm, and a 9 mm multi-chip package (MCP) with a luminous flux of 7,000 lm showed the narrowest beam angle. The luminous intensity at the center was measured at 7.7×106 cd. The distance between the light source and the point where the illuminance was 1 lx was calculated to be 2.8 km. The power consumption of the system was 95 W, which is only 9.5% of that of the 1 kW xenon searchlight, and the beam angle was 1.03°. In a site experiment, it was confirmed that the light ray reflected from the LED searchlight proceeds forward without any diffusion because of the narrow beam angle.
LED searchlight;Light condensing;Luminous intensity;Beam angle;Parabolic reflector;
S. J. Park and Y. L. Lee, Trans. Electr. Electron. Mater., 15, 201 (2014). [DOI: http://dx.doi.org/10.4313/TEEM.2014.15.4.201]
E. D. Jung and Y. L. Lee, Trans. Electr. Electron. Mater., 15, 270 (2014). [DOI: http://dx.doi.org/10.4313/TEEM.2014.15.5.270]
M. K. Kim and J. H. Park, The Current Trend and Industrial Strategies of Next LED, Proc. of KICS Winter Conference (Korean Institute of Communications and Information Sciences, 2010) p. 635-636.
C. H. Tsuei, J. W. Pen and W. S. Sun, Opt Express, 16, 18692 (2008). [DOI: http://dx.doi.org/10.1364/OE.16.018692]
E. R. Vidal, D. Otaduy, D. Ortiz, F. Gonzalez, F. Moreno, and J. M. Saiz, Optik, 125, 1657 (2014). [DOI: http://dx.doi.org/10.1016/j.ijleo. 2013.09.064]
R. Winston, J. C. Minano, and P. G. Benitez, Nonimaging Optics (Schools of Engineering & Natural Science University of California, 2008) p. 24.
L. Infante and S. Maci, IEEE Antennas Wirel Propag Lett., 2, 273 (2003). [DOI: http://dx.doi.org/10.1109/LAWP.2003.820685]
D. Jenkins and R. Winston, J. Opt. Soc. Am., 13, 2106 (1996). [DOI:http://dx.doi.org/10.1364/JOSAA.13.002106]
S. Zhao, K. Wang, F. Chen, and S. Liu, International Conference on Electronic Packaging Technology and High Density Packaging, 1491 (2012). [DOI: http://dx.doi.org/10.1109/ICEPTHDP.2012.6474889]
C. H. Peng, X. N. Li, L. L. Xiong, P. Zhang, X. S. Liu, J. W. Wang, and X. S. Liu, Advances in Optoelectronics and Micro/Nano-Optics, 1 (2012). [DOI: http://dx.doi.org/10.1109/AOM.2010.5713510]