复合/单色光源检测红宝石吸收谱线的差异及分析

Differences and Analysis of Characteristic Peak of Ruby in Detection With Composite/Monochrome light

本文采用微型光纤光谱仪和复合光源联用的方式对红宝石样品进行了透过率光谱测试,并与紫外―可见光分光光度计测得的透过率光谱进行对比,发现红宝石透过率光谱在694nm主峰存在差异,并针对这一差异现象进行了荧光光谱实验。实验表明,复合光源中321nm～691nm波长的激发光可有效诱导红宝石产生以694nm为主峰的荧光,红宝石694nm处透过率光谱的形态由694nm光谱的发射与吸收程度共同决定。因此,采用复合光源的检测方式可得到与单色光检测方式不同的透过率光谱形态。本文对两种仪器的测量过程和其所用光源进行了对比分析,说明了光源能量分布对宝石光谱鉴定的影响,结果能够促进对宝石紫外可见吸收光谱鉴定的认识和改进。

In this article,the curve of measured transmission spectrum of ruby were analyzed by the Micro fiber spectrometer with composite light source,and compared with spectrum by ultraviolet-visible spectrophotometer （UV-VIS）.There were significant differences on 694 nm characteristic peak.According to differences,the experiment was performed using fluorescence spectrophotometer.Tests showed that the excitation light the Wavelength of which is 321 nm～691 nm in composite light can effectively arouse ruby to generate fluorescence the main peak of which is 694 nm.The curve of measured transmission spectrum was jointly determined by spectral intensity of absorption and Emission spectrum,so it is different from Monochrome light.Through the data contrast and analysis from two different kind of light and measurement process,It shows that energy distribution of light source can effect gemstone identification,and it can boost understand and improvement to gemstone identification.