Fei Liu, Jiaxin Li, Junlin Lai, Chunqiao He. Full-Frequency Phase Unwrapping Algorithm Based on Multi-Frequency Heterodyne Principle[J]. Laser & Optoelectronics Progress, 2019, 56(1): 011202
- Laser & Optoelectronics Progress
- Vol. 56, Issue 1, 011202 (2019)
Fig. 1. Three-frequency optical heterodyne principle
Fig. 2. Jumping error. (a) Jumping error of Δn12; (b) error of Δn123; (c) flooring error of N1; (d) error of ?1
Fig. 3. Results of phase unwrapping with different errors. (a) φerror=π/13; (b)(c) φerror=π/15; (d) φerror=π/25
Fig. 4. Error distribution comparison. (a) Unwrapped by proposed algorithm; (b) unwrapped by existing method
Fig. 5. Experiment platform
Fig. 6. (a) Captured by camera; (b) wrapped phase
Fig. 7. Reconstruction results. (a)(b) Unwrapped by existing algorithm; (c)(d) unwrapped by proposed algorithm
Fig. 8. Plane fitting results. (a) Unwrapped by existing algorithm; (b) unwrapped by proposed algorithm
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Table 1. Standard deviation of the unwrapped phase error
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Table 2. 3D deviation of plane fitting
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