Volume 5 Issue 5
Oct.  2012
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WANG Yao, LIU Hua, LU Zhen-wu, FANG Chao, JING Lei. Design of lens for LED rear turn lamps of motor vehicles based on nonimaging optics[J]. Chinese Optics, 2012, 5(5): 499-504. doi: 10.3788/CO.20120505.0499
Citation: WANG Yao, LIU Hua, LU Zhen-wu, FANG Chao, JING Lei. Design of lens for LED rear turn lamps of motor vehicles based on nonimaging optics[J]. Chinese Optics, 2012, 5(5): 499-504. doi: 10.3788/CO.20120505.0499

Design of lens for LED rear turn lamps of motor vehicles based on nonimaging optics

doi: 10.3788/CO.20120505.0499
  • Received Date: 21 Jun 2012
  • Rev Recd Date: 23 Aug 2012
  • Publish Date: 10 Oct 2012
  • A lens for a Light Emitting Diode (LED) rear turn lamp of motor vehicles is designed to increase the accuracy of light distribution and energy efficiency of the lamp. According to the nonimaging optical principle and Snell's law, the lens design is obtained by an iterative solution, and the height and the diameter of the lens are 8.32 mm and 12.64 mm, respectively. By using the optical software TracePro, the LED and the lens of rear turn lamp are traced and simulated. The results show that in a rectangular range from -80? to 80? in the x direction and from -80? to 80? in the y direction, the luminous intensity is greater than 1.6 cd. Moreover, in the rectangular range from -20皌o 20癷n the x direction and from -10皌o 10癷n the y direction, the luminous intensity distribution is approximatly rectangular, and the luminous intensity of each test point meets the requirements of GB17905-2008. The lens can control the LED light precisely, which is beneficial to improve the performance of the light distribution and energy efficiency of the rear turn lamp.

     

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