本論文是使用LightTools光學軟體建立螢光粉之光學模型。首先分別以配光曲線儀與積分球量測藍光LED之配光曲線與光譜;其次建立紅、綠、黃之三種螢光粉光學模型，先以雷射粒徑分析儀分別量測紅、綠、黃螢光粉粒徑分佈與光譜儀量測此三種螢光粉之激發光譜與發射光譜等參數，將藍光LED配光曲線與光譜，螢光粉粒徑分佈、激發光譜、發射光譜，分別輸入LightTools軟體內，利用蒙地卡羅 (Monte-Carlo)法來模擬米氏散射 (Mie scattering)與光線追跡。再進一步計算螢光粉模型之吸收及輻射光線之特性。並針對藍光LED分別激發紅、綠螢光粉在不同重量百分濃度下進行實驗與模擬之輻射功率光譜分佈驗證，可達到歸一化相關係數(NCC) 0.9以上。並設計藍光LED激發黃色螢光粉之白光光源在4000K色點條件下之四種封裝模型，分析其螢光粉用量及出光效率，並應用在筒燈上照明分析。

This paper is using optical software LightTools to building a optical phosphor model.First,using light distribution curve instrument and integrating sphere to measure luminous intensity distribution curve and spectrum of blue LED, following, establish red, green ,yellow three kinds of optical phosphor model;using laser diffraction submicron partical size analyzer measure partical size distribution of phosphor,then ,using photon spectra luminous meter measure excitation and emission spectra and other spectra parameters of these three kinds of phosphor respectively.And input following data to LightTools respectively : luminous intensity distribution curve and spectrum of blue LED ,partical size distribution,excitation and emission spectrum,using Monte-Carlo method to simulate ray tracing with Mie scattering theory, advanced calculate the behavior of absorption and radiation of phosphor .In simulation and experiment ,against blue LED inspiring red ,green phosphor in different concentration verify spectrum distribution,reach normalized correlation coefficient (NCC) above 0.9. Design blue LED inspiring yellow phosphor to conform white source ,in condition color temperature 4000K, comparing four kinds of different package model,analyze its phosphor quantity and luminous efficiency,and applied in downlight illumination analysis.

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