An uncertainty evaluation is presented for the spectroradiometric measurement of the averaged LED intensity (ALI), which is a standardized photometric quantity of LEDs introduced by the Commission Internationale de l'Eclairage. Using a spectral irradiance standard lamp as a calibration source for the spectroradiometer, 12 uncertainty components are sorted out and their propagation formulated with correlations between the components taken into account. The procedure of uncertainty evaluation is demonstrated for four LED samples of different colors; red, green, blue, and white. The relative uncertainties of the ALI of the test samples are determined to be in a range from 4.1percent to 5.5percent (k velence 2), but most of their dominant uncertainty components turn out to be systematic and correlated. In conclusion, correlations between the uncertainty components critically affect the overall uncertainty of the LED measurement using a spectroradiometer.
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机译:针对平均LED强度(ALI)的光谱辐射测量,提出了不确定性评估,这是由国际照明委员会(Commission Internationale de l'Eclairage)引入的标准化的LED光度计量标准。使用光谱辐照度标准灯作为光谱辐射计的校准源,可以分选出12个不确定度分量,并考虑这些分量之间的相关性来确定其传播。演示了对四个不同颜色的LED样品进行不确定度评估的过程。红色,绿色,蓝色和白色。确定样品的ALI的相对不确定度在4.1%至5.5%的范围内(第2列),但事实证明,它们的大多数主要不确定度成分都是系统性的且相关的。总之,不确定度分量之间的相关性会严重影响使用分光辐射计测量LED的总体不确定度。
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