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基于激光自混合干涉技術的單個微納顆粒探測

Single Micro-Nano Particle Detection Based on Laser Self-Mixing Interference Technology

張晨   陳濤   趙宇  
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摘要

提出了一種結構簡單、易準直、能探測單個微納顆粒的激光自混合干涉(SMI)探測方法。建立了單個顆粒產生的激光SMI信號模型,理論分析了干涉信號的特征,搭建了微流控顆粒探測系統。采用自主開發的LabVIEW程序進行聚苯乙烯顆粒的探測實驗和信號采集,并從時域和頻域兩方面分析了單個粒子的直徑。結果表明,本方法能有效探測和區分直徑為0.5~10 μm范圍內的聚苯乙烯微球顆粒。

Abstract

This paper proposes a laser self-mixing interference (SMI) detection method that simple structure, easy collimation, and can detect single micro-nano particle. A laser SMI signal model generated by a single particle is established, the characteristics of the interference signal are theoretically analyzed, and a microfluidic particle detection system is built. Self-developed LabVIEW program is used to carry out detection experiment and signal acquisition of polystyrene particles, and the diameter of a single particle is analyzed from both the time-domain and frequency-domain. The results show that the method can effectively detect and distinguish polystyrene microspheres with diameters ranging from 0.5--10 μm.

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中圖分類號:TN247

DOI:10.3788/LOP57.192803

所屬欄目:遙感與傳感器

基金項目:國家自然科學基金、北京自然科學基金、北京教委重點項目;

收稿日期:2020-01-11

修改稿日期:2020-02-18

網絡出版日期:2020-10-01

作者單位    點擊查看

張晨:北京工業大學激光工程研究院, 北京 100124北京市激光應用技術工程技術研究中心, 北京 100124
陳濤:北京工業大學激光工程研究院, 北京 100124北京市激光應用技術工程技術研究中心, 北京 100124
趙宇:北京工業大學激光工程研究院, 北京 100124北京市激光應用技術工程技術研究中心, 北京 100124

聯系人作者:趙宇(zhaoyuile@bjut.edu.cn)

備注:國家自然科學基金、北京自然科學基金、北京教委重點項目;

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引用該論文

Zhang Chen,Chen Tao,Zhao Yu. Single Micro-Nano Particle Detection Based on Laser Self-Mixing Interference Technology[J]. Laser & Optoelectronics Progress, 2020, 57(19): 192803

張晨,陳濤,趙宇. 基于激光自混合干涉技術的單個微納顆粒探測[J]. 激光與光電子學進展, 2020, 57(19): 192803

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