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Raman Chemical Imaging of Threat Agents Using Pulsed Laser Excitation and Time-Gated Detection

机译:使用脉冲激光激发和时间门控检测对威胁剂进行拉曼化学成像

摘要

The disclosure provides for a system and method for detecting a threat agent. A sample is illuminated to produce photons Raman scattered and emitted by the sample. The Raman scattered photons are collected using time-gated detection without collecting the emitted photons. A Raman spectroscopic data set is generated from said Raman scattered photons wherein said Raman spectroscopic data comprises at least one of a Raman spectrum and a Raman chemical image. The Raman spectroscopic data is assessed to thereby determine the presence or absence of a threat agent in the sample. The sample may be in a target area. The sample may be illuminated using a pulsed laser or an intensity modulated laser. The illumination source may be synchronized with a gating element that enables time-gated detection.
机译:本公开提供了一种用于检测威胁代理的系统和方法。照射样品以产生由样品散射和发射的光子拉曼。拉曼散射光子使用时间门控检测收集,而不收集发射的光子。从所述拉曼散射光子产生拉曼光谱数据集,其中所述拉曼光谱数据包括拉曼光谱和拉曼化学图像中的至少一个。评估拉曼光谱数据,从而确定样品中威胁剂的存在与否。样品可以在目标区域中。可以使用脉冲激光器或强度调制激光器来照射样品。照明源可以与启用时间门控检测的门控元件同步。

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