Phase unwrapping method based on multiple fringe patterns without use of equivalent wavelengths

Authors

Limei Song, Tianjin Polytechnic UniversityFollow
Yulan Chang, Tianjin Polytechnic University
Jiangtao Xi, University of WollongongFollow
Qinghua Guo, University of WollongongFollow
Xin-jun Zhu, Tianjin Polytechnic University
Xiaojie Li, Tianjin Polytechnic University

RIS ID

101963

Publication Details

L. Song, Y. Chang, J. Xi, Q. Guo, X. Zhu & X. Li, "Phase unwrapping method based on multiple fringe patterns without use of equivalent wavelengths," Optics Communications, vol. 355, pp. 213-224, 2015.

Abstract

In order to decrease the noise enhancement in the process of phase unwrapping, we present a new phase unwrapping approach for multiple wavelength phase shift profilometry. In this approach, a series of fringe images with only three wavelengths are captured by the 3D measurement system, and it does not need to calculate the equivalent wavelengths and the equivalent phases. As a result, the noise enhancement is avoided, leading to improved precision in the absolute phase map recovery. Experiment results demonstrate that the proposed method is more robust and effective compared to the existing TWPSP method.