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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 28, Iss. 5 — May. 1, 2011
  • pp: 815–820

Lens design of LED searchlight of high brightness and distant spot

Shuang Zhao, Kai Wang, Fei Chen, Dan Wu, and Sheng Liu  »View Author Affiliations

JOSA A, Vol. 28, Issue 5, pp. 815-820 (2011)

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The study related in this paper is the design of a ship-mounted LED of high brightness and distant spot. The freeform lens design obeying the edge ray principle and Snell’s law is presented first. Then, to fit the illumination requirement of the searchlight, we designed a freeform lens to collimate all the light rays coming from the LED. However, theoretical analysis proves that there is a critical angle for incident rays beyond which the rays cannot be collimated, and 55% is the light-efficiency limit for polymethyl methacrylate freeform lens. We then designed a combination of a freeform lens–coupled parabolic reflector that improved light efficiency to 70%. In this paper, the design of the freeform lens–coupled parabolic reflector is given in detail. In addition, tolerance analysis and the effect of manufacturing defect are presented.

© 2011 Optical Society of America

OCIS Codes
(220.3620) Optical design and fabrication : Lens system design
(230.3670) Optical devices : Light-emitting diodes
(220.2945) Optical design and fabrication : Illumination design
(080.4298) Geometric optics : Nonimaging optics

ToC Category:
Optical Devices

Original Manuscript: February 16, 2011
Manuscript Accepted: February 22, 2011
Published: April 20, 2011

Shuang Zhao, Kai Wang, Fei Chen, Dan Wu, and Sheng Liu, "Lens design of LED searchlight of high brightness and distant spot," J. Opt. Soc. Am. A 28, 815-820 (2011)

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  1. W. Chi and N. George, “Light-emitting diode illumination design with a condensing sphere,” J. Opt. Soc. Am. A 23, 2295–2298(2006). [CrossRef]
  2. M. R. Krames, O. B. Shchekin, R. M. Mach, G. O. Mueller, L. Zhou, G. Harbers, and M. G. Craford, “Status and future of high-power light-emitting diodes for solid-state lighting,” J. Display Technol. 3, 160–175 (2007). [CrossRef]
  3. Z. R. Zhen, X. Hao, and X. Liu, “Freeform surface lens for LED uniform illumination,” Appl. Opt. 48, 6627–6634 (2009). [CrossRef]
  4. K. Wang, S. Liu, F. Chen, Z. Y. Liu, and X. B. Luo, “Optical design for LED lighting,” presented at the 5th China International Exhibition and Forum on Solid State Lighting, Shenzhen, China, 24–26 July 2008.
  5. W. A. Parkyn and D. G. Pelka, “New TIR lens applications for light-emitting diodes,” Proc. SPIE 3139, 135–140 (1997). [CrossRef]
  6. W. A. Parkyn and D. G. Pelka, “TIR lenses for fluorescent lamps,” Proc. SPIE 2538, 93–103 (1995). [CrossRef]
  7. J. S. Schruben, “Formulation of a reflector-design problem for a lighting fixture,” J. Opt. Soc. Am. 62, 1498–1501 (1972). [CrossRef]
  8. H. Ries and A. Rabl, “Edge-ray principle of nonimaging optics,” J. Opt. Soc. Am. A 11, 1256–1259 (1994). [CrossRef]
  9. F. Chen, S. Liu, K. Wang, X. B. Luo, and Z. Y. Liu, “Free-form lenses for high illumination quality light-emitting diode MR16 lamps” Opt. Eng. 48, 123002 (2009). [CrossRef]
  10. Y. Ding, X. Liu, Z. R. Zheng, and P. F. Gu, “Freeform LED lens for uniform illumination,” Opt. Express 16, 12958–12966(2008). [CrossRef] [PubMed]
  11. K. Wang, S. Liu, F. Chen, Z. Y. Liu, and X. B. Luo, “Effect of manufacturing defects on optical performance of discontinuous freeform lenses,” Opt. Express 17, 5457–5465 (2009). [CrossRef] [PubMed]

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