论文标题
在基于axicon的反向散射配置中，使用拉曼光谱法进行透过的威士忌感测和分类
Through-Bottle Whisky Sensing and Classification using Raman Spectroscopy in an Axicon-Based Backscattering Configuration
论文作者
论文摘要
非侵入性检测系统有可能通过各种透明玻璃和塑料容器来表征材料。食物和饮料掺假越来越有问题，代表了严重的健康风险以及经济问题。对于诸如苏格兰威士忌之类的酒精烈酒，这通常是针对欺诈活动的。我们已经开发了一种带有新颖的激发和收集几何形状的拉曼系统，从axicon镜头中利用了光束的传播，导致环形梁变为样品中的贝塞尔照明。这有助于从瓶子内的酒精烈酒中有效地获取拉曼信号，同时避免收集瓶墙产生的自动荧光信号。因此，该技术提供了一种非破坏性和非接触式检测的方法，可以精确地分析内容，而无需打开瓶子。
Non-intrusive detection systems have the potential to characterise materials through various transparent glass and plastic containers. Food and drink adulteration is increasingly problematic, representing a serious health risk as well as an economic issue. This is of particular concern for alcoholic spirits such as Scotch whisky which are often targeted for fraudulent activity. We have developed a Raman system with a novel geometry of excitation and collection, exploiting the beam propagation from an axicon lens resulting in an annular beam that transforms to a Bessel illumination within the sample. This facilitates the efficient acquisition of Raman signals from the alcoholic spirit contained inside the bottle, while avoiding the collection of auto-fluorescence signals generated by the bottle wall. Therefore, this technique provides a way of non-destructive and non-contact detection to precisely analyse the contents without the requirement to open the bottle.
