基于差动共焦显微技术的微区拉曼光学系统构建与实验研究

doi:10.3969/j.issn.1000-1158.2020.04.002

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摘要研制了一种基于差动共焦显微技术的微区拉曼光学系统装置,对无机样品进行微区拉曼光谱探测。传统显微共焦拉曼光谱技术没有强调系统的定焦能力,而所研制的光学系统装置利用差动共焦曲线过零点与焦点位置精确对应的特性,采用反馈控制技术,具有长时间定焦功能。在微区拉曼散射信号收集时,采用多模光纤空间耦合技术,以光纤代替传统物理探测针孔,提高了环境抗干扰能力,优化了系统结构和装调性能。实验结果表明:该装置具有较高稳定性,可有效探测单壁碳纳米管在1581.510cm^-1、2708.065cm^-1特征峰处的拉曼频移及纯物质硫在153.113cm^-1、219.917cm^-1、473.322cm^-1特征峰处的拉曼频移并且实现碳管的单线检测,满足了光谱探测系统装置设计需求。

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	姜静子
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关键词 ：计量学, 差动共焦显微技术, 微区共焦拉曼光学系统, 光谱探测

Abstract：A micro-area Raman optical system based on differential confocal microscopy technology is developed to detect the micro-area Raman spectroscopy of inorganic samples. The traditional confocal Raman spectroscopy technology does not emphasize the focusing ability of the system, but the optical system device has the function of long-time focusing by using on the characteristic that the zero-crossing point of the differential confocal curve corresponds precisely to the focal point position and adopting feedback control technology. When collecting Raman scattering signals in micro-area, multi-mode optical fiber spatial coupling technology is used to replace traditional physical detection pinholes with optical fiber, which improves the anti-interference ability of the environment and optimizes the system structure and adjusting performance. The experimental results show that the device has high stability and can effectively detect the Raman frequency shift of single-walled carbon nanotubes at 1581.510cm^-1, 2708.065cm^-1 characteristic peaks and the Raman frequency shift of pure sulfur at 153.113cm^-1, 219.917cm^-1, 473.322cm^-1 characteristic peaksand realize the single-line detection of the carbontube. The device meets the design requirements of the spectral detection system.

Key words： metrology differential confocal microscopy techndogy micro-area confocal Raman optical system spectral detection

收稿日期: 2018-11-08

PACS:

TB92

基金资助:国家重点研发计划(2016YFF0200602);科技部国家重点研发专项(2016YFA0200901)

通讯作者: 高思田(1962-), 男, 天津人,中国计量科学研究院研究员, 博士, 研究方向为纳米测量、精密仪器测量。 Email: gaost@nim. ac. cn E-mail: gaost@nim.ac.cn

作者简介: 姜静子(1993-),女,浙江丽水人,浙江理工大学硕士研究生,主要研究方向为测试计量技术及仪器。Email: 18258244076@163.com

引用本文:

姜静子, 高思田, 黄鹭, 李琪, 连笑怡. 基于差动共焦显微技术的微区拉曼光学系统构建与实验研究[J]. 计量学报, 2020, 41(4): 399-405.
JIANG Jing-zi, GAO Si-tian, HUANG Lu, LI Qi, LIAN Xiao-yi. Construction and Experimental Study of Micro-area Raman OpticalSystem Based on Differential Confocal Microscopy Technology. Acta Metrologica Sinica, 2020, 41(4): 399-405.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2020.04.002 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2020/V41/I4/399

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