Acta Optica Sinica, Volume. 39, Issue 4, 0412012(2019)
Improved Dual-Frequency On-Line Phase Measuring Profilometry Based on Full-Cycle Equal Phase-Shift Algorithm
Based on the relative position relationship between the measured object and the high-frequency fringe in the on-line three-dimensional (3D) measurement, an improved dual-frequency on-line 3D measurement method is proposed. By controlling the acquisition points when the measured object moves, the light intensity distribution of the high-frequency fringe in each deformed pattern after pixel matching can be exactly consistent. The full-cycle equal phase-shift algorithm is directly applied for phase calculation so that the filtering process is avoided and the 3D reconstruction accuracy is improved. The light intensity component of the high-frequency fringe is designed to be much smaller than that of the low-frequency fringe, and it can be considered as faint background light and the interference of high-frequency fringe on phase calculation is further reduced. The simulated and experimental results show that compared with other methods, the proposed method can improve the reconstruction accuracy effectively.
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Kuang Peng, Yiping Cao, Yingchun Wu. Improved Dual-Frequency On-Line Phase Measuring Profilometry Based on Full-Cycle Equal Phase-Shift Algorithm[J]. Acta Optica Sinica, 2019, 39(4): 0412012
Category: Instrumentation, Measurement and Metrology
Received: Oct. 22, 2018
Accepted: Dec. 25, 2018
Published Online: May. 10, 2019
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