不同激發光螢光粉光學模型之分析;The analysis of different blue light sources for YAG phosphor model

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/54236

Title:	不同激發光螢光粉光學模型之分析;The analysis of different blue light sources for YAG phosphor model
Authors:	郭冠廷;Kuo,Kuan-Ting
Contributors:	光電科學研究所
Keywords:	發光二極體;螢光粉;吸收係數;轉換效率;YAG;Phosphor;Absorption coefficient;Conversion efficiency;LED
Date:	2012-08-21
Issue Date:	2012-09-11 18:40:31 (UTC+8)
Publisher:	國立中央大學
Abstract:	在本論文中，為了探討不同波長之激發光搭配YAG 螢光粉封裝成白光LED 的光學特性，因此建立了不同激發光YAG 螢光粉光學模型，而我們利用蒙地卡羅 (Monte-Carlo) 光追跡法結合米氏散射(Mie Scatter) 原理來模擬光線在YAG 螢光粉內的散射行為，並藉由二次光追跡來得到吸收係數和轉換效率。由於藍光經過YAG螢光粉後會發生形變，所以引入β參數結合螢光粉吸收頻譜來修正藍光頻譜形變的情形，並利用線性疊加的方式還原其頻譜，最後藉由實際半球封裝白光LED來驗證光學模型的準確性。In order to explore the property of white light LED, we build the phosphor model which is encapsulated with different LED wavelength. we use the Monte-Carlo ray tracing method with Mie scattering theory to simulate the scattering behavior in YAG phosphor, and obtain absorption coefficient and transfer efficiency by 2-nd ray tracing. Because the spectrum of blue light will distort by YAG phosphor, we introduced a coefficient β to compensate the distortion of blue light spectrum, and recover the original spectrum by superposition. At last, we verified the accuracy of model by experiment.
Appears in Collections:	[Graduate Institute of Optics and Photonics] Electronic Thesis & Dissertation

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