LIU Hong-xing, REN Jian-wei, LI Xian-sheng, SUN Jing-xu, YE Zhao, ZHAO Wen-cai. Screening of LED for spectrum-tunable light source[J]. Journal of Applied Optics, 2013, 34(1): 56-61.
Citation: LIU Hong-xing, REN Jian-wei, LI Xian-sheng, SUN Jing-xu, YE Zhao, ZHAO Wen-cai. Screening of LED for spectrum-tunable light source[J]. Journal of Applied Optics, 2013, 34(1): 56-61.
shu

Screening of LED for spectrum-tunable light source

  • 1.

    Changchun Institute of Optics,Fine Mechanics and Physics,CAS,Changchun 130033,China;

  • 2.

    Graduate University of Chinese Academy of Sciences,Beijing 100039,China

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    • Abstract
  • In order to meet the requirements for lifetime and spectrum consistency of LED used in LED-based spectrum-tunable light source, 29 kinds of LEDs were seasoned for 200 hours separately under the accelerated current condition, and a spectral consistency screening algorithm was proposed. Results of ageing test indicate that the values of radiant flux attenuation of 3 kinds of LEDs, whose peak wavelengths are 385 nm, 400 nm and 420-1 nm, are 24.8%, 10.7% and 25.6%,respectively, so they are not suitable for LED-based spectrum-tunable light source. The values of radiant flux attenuation of the remaining 26 kinds of LEDs are all below 3.5%, and they are all suitable for LED-based spectrum-tunable light source. The spectral consistency screening algorithm is based on the LED-s spectroscopic data, and the relative spectral deviation among the same kinds of LEDs can be calculated. The relative spectral deviations of 26 kinds of LEDs are all below 4.5%, the spectral consistency of the screened LED can be ensured.
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