Laser & Optoelectronics Progress, Volume. 57, Issue 19, 192803(2020)
Single Micro-Nano Particle Detection Based on Laser Self-Mixing Interference Technology
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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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
Category: Remote Sensing and Sensors
Received: Jan. 11, 2020
Accepted: Feb. 18, 2020
Published Online: Sep. 23, 2020
The Author Email: Zhao Yu (zhaoyuile@bjut.edu.cn)