危险化学品泄漏, 公共场所爆炸等安全问题时刻威胁公众安全, 亟需研究用于危化品现场检测的便携、快速、准确的探测装置。虽然现有的检测装置能够实现对样品的识别, 但由于体积大, 需要预处理, 不适合现场快检。因此, 提出了将拉曼系统与手机融合, 使其更加便捷, 便于实现对危险化学品的现场快速识别。该仪器采用了大数值孔径镜头(F/2.0)替换传统反射光谱仪中凹面反射镜(F/4.0), 光学收集效率提高了近4倍, 同时利用体相位全息光栅和狭缝空间耦合技术, 提高了系统的灵敏度。文中利用设计的拉曼系统对10种易燃易爆危险化学样品进行光谱测试, 实现了对危化品的现场检测, 10种危化品与数据库的匹配系数能达到95%以上, 具有快速、准确、无损的优势, 对日后的安检应用领域具有重要意义。

Due to the public safety was always threatened by the safety problems such as leakage of hazardous chemicals and explosions in public places, it was urgent to develop a portable, rapid and accurate detection device for on-site detection of hazardous chemicals. Although the existing detection devices were able to identify the samples, because of the large volume and the demand of pretreatment, they cannot be applied in on-site quick inspection. Therefore, the fusion the Raman system and smart phone were integrated to make it more convenient and easy to fast recognition hazardous chemicals on- site. The instrument adopts big aperture lens (F/2.0) replaced the concave reflector (F/4.0) in traditional reflectance spectromete and the optical collection efficiency has increased by nearly 4 times. At the same time, the volume phase holographic transmission grating (VPG) and slit coupling technology were adopted to improve the sensitivity of the system. There were ten kinds of flammable and explosive dangerous chemical samples tested by this Raman spectroscopy system, which help to realize the on-site inspection and has the advantages of rapidity, accuracy and non-destructibility. The matching coefficient between the ten dangerous chemicals and the database can reach more than 95%. It was of great significance to the future security application.