日盲紫外拉曼光谱遥测系统及其检测实验  

Solar-Blind Ultraviolet Raman Spectroscopic Remote Detection System and Its Detection Experiments

作　　者：王维林 郭一新 金伟其 裘溯[1] 何玉青 郭宗昱 杨书宁 WANG Wei-lin;GUO Yi-xin;JIN Wei-qi;QIU Su;HE Yu-qing;GUO Zong-yu;YANG Shu-ning(MOE Key Lab of Photoelectronic Imaging Technology and System,School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China;Science and Technology on Low-Light-Level Light Vision Laboratory,Kunming Institute of Physics,Xi'an 710065,China)

机构地区：[1]北京理工大学光电学院光电成像技术与系统教育部重点实验室,北京100081 [2]昆明物理研究所微光夜视技术重点实验室,陕西西安710065

出　　处：《光谱学与光谱分析》2025年第3期706-711,共6页Spectroscopy and Spectral Analysis

基　　金：国家重点研发项目子课题(2016YFC0800904-Z02);微光夜视技术重点实验室基金项目(J20210101)资助。

摘　　要：拉曼光谱检测广泛应用于毒品、化学品泄漏、食品安全、爆炸物残留等领域,而传统可见光或近红外光的拉曼光谱系统受环境光影响大,通常需在封闭的样品盒或夜间条件下进行拉曼光谱检测;常规的紫外拉曼光谱检测则多以微距为主,难以在自然光条件下适应样品的遥测要求。面对自然光环境下特殊的拉曼光谱遥测需求,设计搭建了一套紫外拉曼光谱遥测实验系统,由266 nm激光光源、前置光学系统、信号接收系统和信号处理系统组成,采用发射光路与收集光路同轴半共用的光学系统设计,保证了系统对焦的灵活性,可对远距离物质快速对准聚焦并进行检测;前置光学系统与信号接收系统使用中继透镜、光纤、日盲紫外光谱仪耦合的方式传输与检测了拉曼光谱,保证了系统整体的灵活性。采用迭代差分自回归估计的拉曼光谱降噪算法IDAR对检测的拉曼光谱进行降噪,提升了对样本弱拉曼特征峰的分辨能力。通过在200~1500 mm距离、每隔100 mm设置检测点,对特氟龙(teflon)、碳酸氢钠(sodium bicarbonate)、葡萄糖酸钙(calcium gluconate)、罗红霉素(roxithromycin)以及布洛芬(ibuprofen)等五种典型物质进行了重复多组不同积分时间、不同距离的拉曼光谱遥测实验,并与15 mm微距紫外拉曼光谱检测系统的测试结果进行了对比,实验结果表明:遥测系统可对距离1500 mm处的特氟龙进行有效检测,对碳酸氢钠、布洛芬、葡萄糖酸钙以及罗红霉素等四种样本的遥测距离达到600 mm,证明日盲紫外拉曼光谱遥测实验系统具有自然环境光下较好的遥测能力,遥测距离可满足部分现场安全检测、毒品检测、爆炸物残留检测以及食品安全检测等应用场景要求。Raman spectroscopy is widely used to detect drugs,chemical leaks,food safety,explosive residue,and other fields.However,traditional Raman spectroscopy systems using visible or near-infrared light are greatly affected by environmental light.They typically require Raman spectroscopy in closed sample boxes or under nighttime conditions.Conventional UV Raman spectroscopy is mostly based on micro-distances and is difficult to adapt to the remote detection requirements of samples under natural light conditions.This paper designs and builds a UV Raman spectroscopy remote detection experimental system to meet the special remote Raman spectroscopy requirements under natural light environments.It comprises a 266 nm laser light source,front-end optical system,signal reception system,and signal processing system.The optical system design uses a coaxial semi-common optical system for the emission and collection of light paths,ensuring the system s focusing flexibility.It can quickly align and focus on distant substances for detection.The front-end optical system and signal reception system use relay lenses and fibers and are coupled with a blind UV spectrometer for transmission and detection of Raman spectroscopy signals,ensuring the system s overall flexibility.Based on iterative differential auto-regression estimation,the Raman spectroscopy denoising algorithm IDAR is used to denoise the detected Raman spectra,enhancing the resolution of weak Raman characteristic peaks in samples.The paper sets detection points at intervals of 100 mm from 200 to 1500 mm.It conducts repeated multiple sets of Raman spectroscopy remote detection experiments on five typical substances:Teflon,sodium bicarbonate,calcium gluconate,erythromycin,and ibuprofen.The experiments are conducted at different integration times and distances,and the results are compared with those of a 15 mm micro-distance UV Raman spectroscopy detection system.The experimental results show that the remote detection system can effectively detect Teflon at a distance of 1500

关 键 词：拉曼光谱 日盲紫外 遥测 系统设计 

分 类 号：O657.37[理学—分析化学]