Phase extraction method with spatial-temporal fringe

Ronggang Zhu; Zhe Zhang

doi:10.1117/12.2550177

20 December 2019 Phase extraction method with spatial-temporal fringe

Ronggang Zhu, Zhe Zhang

Proceedings Volume 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019); 112095F (2019) https://doi.org/10.1117/12.2550177
Event: Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 2019, Xi'an, China

Abstract

Phase extraction technology is widely used in interferometry, structured light 3D vision Sensor and phase deflection measurement. However, in the process of application, the accuracy of phase extraction is often reduced by various disturbances. For example, the high frequency noise in speckle interferometry, nonlinear effects in CCD detectors and Gamma effects in projection or display devices. This paper mainly introduces a method of constructing a picture of spatial-temporal fringes(STF) by phase-shifting fringe patterns. The method combines the N step phase-shifting fringe patterns into a STF pattern that contains both temporal information and spatial information. Then, the phase of original fringe patterns can be obtained by STF pattern. In addition, simulation experiments are carried out to verify the ability of phase extraction of STF pattern to suppress random noise and harmonics. This method will provide useful reference for practical engineering application.

Citation Download Citation

Ronggang Zhu and Zhe Zhang "Phase extraction method with spatial-temporal fringe", Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 112095F (20 December 2019); https://doi.org/10.1117/12.2550177

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KEYWORDS

Fringe analysis

Fourier transforms

Phase shifts

Phase measurement

Signal processing

Phase shifting

Phase shift keying

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