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Proceedings Paper

Fast and high-accuracy spectral measurements of LED by linear CCD sensor and software calibration
Author(s): Donghui Wang; Hui Qian; Xin Yuan
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Paper Abstract

The paper discusses practical aspects of LED measurements and problems about how to improve the measurement accuracy of LED spectral properties when using linear CCD sensor. Designed and implemented an instrument for LED spectral measurement based on linear CCD sensor. The CCD sensor has 2048 pixels and ultra-high sensitivity. The duration of one measurement is about 10ms. For reducing the effect of CCD output noise, a software filtering method is introduced. After software calibration, the accuracy of color temperature is 40K in the range of 1300K to 25000K, and accuracy of wavelength is 0.2nm in the range of 360nm to760nm. The accuracy of chromaticity coordinated (x, y) or (u, v) is better than 0.003.

Paper Details

Date Published: 20 January 2005
PDF: 7 pages
Proc. SPIE 5633, Advanced Materials and Devices for Sensing and Imaging II, (20 January 2005); doi: 10.1117/12.577176
Show Author Affiliations
Donghui Wang, Zhejiang Univ. (China)
Hui Qian, Zhejiang Univ. (China)
Xin Yuan, Zhejiang Univ. (China)

Published in SPIE Proceedings Vol. 5633:
Advanced Materials and Devices for Sensing and Imaging II
Anbo Wang; Yimo Zhang; Yukihiro Ishii, Editor(s)

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