微型光纤光谱仪的波长定标分析

为了提高光纤光谱仪的测量精度,采用标准汞氩灯谱线和最小二乘法的3阶线性拟合,取得了完整的波长定标方案。结果表明,算术平均误差小于0.167nm,标准差小于0.217nm,波长与像素的拟合相关程度较高;定标后波长不确定度优于0.11nm,误差小于0.15nm,波长重复性可达0.01nm。这一结果对提高光谱仪实际应用中的测量精度是非常有益的。

Wavelength calibration for miniature fiber optical spectrometers

In order to improve the measurement accuracy of the miniature fiber spectrometer, a complete calibration scheme was obtained based on the standard emission spectrum of mercury and argon lamp and three-order linear fitting of the least squares. Calibration results show that the arithmetic mean error is less than 0.167nm, standard deviation is less than 0.217nm and the fitting related degree is high. Test results show that after calibration the wavelength uncertainty is better than the 0.11nm, the error is less than 0.15nm, and the wavelength repeatability can reach 0.01nm. This result is beneficial for improving the measurement precision of spectrometers in the practical applications.