Volume 42 Issue 1
Feb.  2014
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Sun Xiuhui, Du Jinglei, Yin Shaoyun, Deng Qiling, Du Chunlei. Free-form lens design method based on the modulation of the aspheric inner surface for uniform illumination[J]. Infrared and Laser Engineering, 2013, 42(1): 163-166.
Citation: Sun Xiuhui, Du Jinglei, Yin Shaoyun, Deng Qiling, Du Chunlei. Free-form lens design method based on the modulation of the aspheric inner surface for uniform illumination[J]. Infrared and Laser Engineering, 2013, 42(1): 163-166.

Free-form lens design method based on the modulation of the aspheric inner surface for uniform illumination

  • Received Date: 2012-05-12
  • Rev Recd Date: 2012-06-11
  • Publish Date: 2013-01-25
  • In the free-form surface construction process, the solution deviation is produced, which will lead to the poor illumination performance of the traditional free-form lens. To make the illumination performance better and increase energy efficiency, a free-form lens design method based on the modulation of the aspheric inner surface was proposed. The aspheric inner surface was used to modify the deviation of the free-form surface. With a proper aspheric inner surface, the expected illumination performance was obtained and the energy efficiency was increased. By calculating the deviation of the free-form surface, the relationship between the incident ray and the slope of the inner surface was built. Taking an LED street light as an example, by using the method, the uniformity of illumination improved from 0.66 to 0.73, and the light usage efficiency is improved from 47.3% to 63.2%.
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    [17] Liu dong, Yang Yongying, Tian Chao, et al. Partial null lens for general aspheric testing[J]. Infrared and Laser Engineering, 2009, 38(2): 322-325. (in Chinese)
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Free-form lens design method based on the modulation of the aspheric inner surface for uniform illumination

  • 1. Department of Physics,Sichuan University,Chengdu 610065,China;
  • 2. Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China

Abstract: In the free-form surface construction process, the solution deviation is produced, which will lead to the poor illumination performance of the traditional free-form lens. To make the illumination performance better and increase energy efficiency, a free-form lens design method based on the modulation of the aspheric inner surface was proposed. The aspheric inner surface was used to modify the deviation of the free-form surface. With a proper aspheric inner surface, the expected illumination performance was obtained and the energy efficiency was increased. By calculating the deviation of the free-form surface, the relationship between the incident ray and the slope of the inner surface was built. Taking an LED street light as an example, by using the method, the uniformity of illumination improved from 0.66 to 0.73, and the light usage efficiency is improved from 47.3% to 63.2%.

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