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受自吸收等因素的影响,由发光二极管(LED)归一化光谱模型得到的光谱与实测LED光谱之间存在差异。为得到与实测LED光谱相吻合的归一化光谱模型,将由归一化光谱模型得到的理论光谱与实测光谱相减得到近似的自吸收谱。通过分析自吸收谱的峰值强度和半峰全宽与温度之间的关系以及其峰值能量与实测光谱峰值能量之间的定量关系,结合LED光谱的高斯模型和归一化光谱模型给出了自吸收谱的拟合表达式,并作为归一化光谱模型的修正项,对归一化光谱模型进行修正。在不同测试温度下的实验结果表明修正后的平均模型误差小于4%,证明由修正后的归一化光谱模型得到的光谱与实测光谱相吻合。
Affected by factors such as self-absorption, there is a difference between the spectrum obtained from the normalized spectral model of a light-emitting diode (LED) and the measured LED spectrum. In order to get the normalized spectral model which matches with the measured LED spectrum, the theoretical self-absorption spectrum obtained by subtracting the theoretical spectrum from the measured spectrum from the normalized spectral model is obtained. By analyzing the relationship between the peak intensity and the full width at half maximum of the self - absorption spectrum and the temperature, and the quantitative relationship between the peak energy and the peak energy of the measured spectrum, the Gaussian model and the normalized spectral model of the LED spectrum are given Absorb the fitted expression of the spectrum, and correct the normalized spectral model as a correction term of the normalized spectral model. The experimental results at different test temperatures show that the average error of the modified model is less than 4%, which proves that the spectrum obtained from the modified normalized spectral model agrees well with the measured spectra.