基于剪切模式的快速共焦拉曼光谱探测方法  

Fast confocal Raman detection system based on Crop Mode

作　　者：马寒 邱丽荣[1] 赵维谦[1] 王允[1] 王瑞石 MA Han;QIU Lirong;ZHAOWeiqian;WANG Yun;WANG Ruishi(MIIT Key Laboratory of Complex-field Intelligent Exploration,School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China;Sensor Intelligence Technology Innovation Center,Advanced Technology Research Institute,Beijing Institute of Technology,Jinan 250300,China)

机构地区：[1]北京理工大学光电学院“复杂环境智能感测技术”工信部重点实验室,北京100081 [2]北京理工大学前沿技术研究院传感智能技术创新中心,山东济南250300

出　　处：《光学技术》2023年第5期562-567,共6页Optical Technique

基　　金：国家自然科学基金青年科学基金(62105021);国家重大科研仪器研制项目(61827826)。

摘　　要：针对弱散射样品的拉曼光谱信号弱,探测时间长的问题,提出了一种基于剪切模式的快速激光共焦拉曼光谱探测方法,该方法通过减少信号传输单元来减小曝光时间,通过只采集信号靶面单元有效拉曼光斑区域的方式,在保证拉曼信号强度的基础上同时提升拉曼光谱探测信噪比,进而减少所需探测时间,实现弱散射样品的快速拉曼光谱探测。实验表明,与传统共焦拉曼光谱探测系统相比,文章采用的剪切模式可将硅拉曼光谱探测速度提升37.5倍以上,为共焦拉曼光谱显微技术的快速探测提供了一种新的技术途径。Aiming at the problems of weak Raman spectrum signal and long detection time of weakly scattered samples,a fast laser confocal Raman spectrum detection method based on Crop Mode is proposed.The method reduces the exposure time by reducing the signal transmission unit,and only collects the effective Raman spot area of the signal target unit.On the basis of guaranteeing the intensity of Raman signal,the signal-to-noise ratio of Raman spectral is also improved to reduce the required detection time and realize fast Raman spectral imaging of weakly scattered samples.Experiments show that compared with the traditional confocal Raman spectral detection system,the Crop mode adopted in this paper can improve the imaging speed of confocal Raman spectrum by more than 60 times,which provides a new technical way for the rapid detection of confocal Raman spectral microscopy technology.

关 键 词：拉曼光谱 探测速度 EMCCD 剪切模式 

分 类 号：TP742[自动化与计算机技术—检测技术与自动化装置]