空间偏移拉曼光谱信号探测及增强技术

Signal Detection and Enhancement Technology in Spatially Offset Raman Spectroscopy

  • 摘要: 空间偏移拉曼光谱技术是一种新型拉曼光谱探测技术,具有无损、快速检测不/半透明介质覆盖下隐藏的内层成分的拉曼光谱的优势。文章开展了空间偏移激光拉曼光谱信号探测及增强技术研究,实现了NaNO3、Na2SO4等多种隐藏成分的探测,并基于该技术现存探测信号微弱有待提高的问题,进行了探测系统的建立及优化,针对信号相对强度随偏移距离、探测深度等重要参数的变化关系进行了分析研究,有效增强了探测信号强度比,为其后续在安检、医疗、生物、考古等方面的应用研究打下基础。

     

    Abstract: Spatially offset Raman spectroscopy (SORS) technology is a new type of Raman spectroscopy technology, which can detect the medium concealed in the opaque or sub-transparent material fast and nondestructively. In this paper, the signal detection and enhancement technology based on SORS was studied, and the detection of various hidden components was realized. Based on the problem of weak detection signals, the detection system was established and optimized. Meanwhile, the relationship between the relative strength of signals and important parameters such as offset distance and detection depth was analyzed and studied. The study effectively enhances the intensity of detection signals, and it lays the foundation for the subsequent detection of explosives, biological diagnosis and other applications.

     

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