Yu Zhao, Jiawei Li, Menglei Zhang, Yangyang Zhao, Jianglin Zou, Tao Chen. Phase-unwrapping algorithm combined with wavelet transform and Hilbert transform in self-mixing interference for individual microscale particle detection[J]. Chinese Optics Letters, 2023, 21(4): 041204
- Chinese Optics Letters
- Vol. 21, Issue 4, 041204 (2023)
Fig. 1. Simulated signal from a 5 µm diameter particle. (a) Temporal signal; (b) phase profile.
Fig. 2. Chart diagram of CWT-HT signal processing algorithm for particle-induced SMI signal.
Fig. 3. Schematic of SMI system.
Fig. 4. Signal burst of 2 µm PS particle. (a) Raw SMI signal (black), denoised SMI signals by BPF (red) and CWT (blue); (b) scalogram of CWT.
Fig. 5. Phase profiles of the 2 µm PS particle SMI signal by BPF (red) and CWT (blue).
Fig. 6. Signal bursts of the PS particles in different diameters after CWT denoising. (a) 500 nm; (b) 3 µm; (c) 4 µm; (d) 5 µm.
Fig. 7. Phase curve as a function of the particle diameter. The blue circle marks represent the mean values and the standard deviations of the measured value of phase
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Table 1. Parameters for Simulation
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