激光与光电子学进展, 2020, 57 (19): 192803, 网络出版: 2020-09-23
基于激光自混合干涉技术的单个微纳颗粒探测 下载: 902次
Single Micro-Nano Particle Detection Based on Laser Self-Mixing Interference Technology
激光自混合干涉 微流控芯片 微纳颗粒 光学探测 laser self-mixing interference microfluidic chip micro-nano particles optical detection
摘要
提出了一种结构简单、易准直、能探测单个微纳颗粒的激光自混合干涉(SMI)探测方法。建立了单个颗粒产生的激光SMI信号模型,理论分析了干涉信号的特征,搭建了微流控颗粒探测系统。采用自主开发的LabVIEW程序进行聚苯乙烯颗粒的探测实验和信号采集,并从时域和频域两方面分析了单个粒子的直径。结果表明,本方法能有效探测和区分直径为0.5~10 μm范围内的聚苯乙烯微球颗粒。
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.
张晨, 陈涛, 赵宇. 基于激光自混合干涉技术的单个微纳颗粒探测[J]. 激光与光电子学进展, 2020, 57(19): 192803. Chen Zhang, Tao Chen, Yu Zhao. Single Micro-Nano Particle Detection Based on Laser Self-Mixing Interference Technology[J]. Laser & Optoelectronics Progress, 2020, 57(19): 192803.