A generalized approach to modeling radiation pattern measurement methods for high-power LEDs

Gao Wei Chang*, Chia Cheng Liao, Yung Chang Chen


研究成果: 書貢獻/報告類型會議論文篇章

1 引文 斯高帕斯(Scopus)


The rapid growth of high-power light-emitting diode (LED) technologies has gained momentum in developing accurate tools and methods to measure performances of such products. For instance, it is widely recognized that confirming the photobiological safety is extremely important since the light of the high-power products may be shone directly into people's eyes. For many years, the international standard organizations, such as CIE, and researchers have been developing guidelines and/or improving methods for measuring the LED radiation patterns, respectively. However, the difficulties in LED measurements have been still highlighted by discrepancies in the experimental results among different laboratories. In this paper, we first propose a mathematical formulation for the existing approaches, such as those using two- and three-dimensional goniometers. Then, generalization of the measurement methods is presented to improve the system measurement accuracy, through making a connection between a predicted accuracy and the parameters of the optical setups (such as aperture size and working distance). To verify the effectiveness of our approach, the experiments are conducted to evaluate and compare the performances of the proposed approach. The measurement results indicate that our approach is consistent from theory to practice.

主出版物標題Optical Modelling and Design
出版狀態已發佈 - 2010
事件Optical Modelling and Design - Brussels, 比利时
持續時間: 2010 4月 132010 4月 15


名字Proceedings of SPIE - The International Society for Optical Engineering


其他Optical Modelling and Design

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 電腦科學應用
  • 應用數學
  • 電氣與電子工程


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