Robust Phase Reconstruction Using Random Three Step Phase-Shift in Wavelength Tuning Interferometer

Author:

Zhu Xueliang1,Wang Dasen2,Li Jing1,Hao Yilei1,Liu Bingcai1,Tian Ailing1,Jin Guiying1,Zhao Pengcheng1

Affiliation:

1. School of Optoelectronic Engineering, Xi’an Technological University, Xi’an, 710021, China

2. Advanced Manufacturing Institute, Inner Mongolia Institute of Metal Materials, Ningbo, 710021, China

Abstract

The standard stochastic two-step phase shift phase demodulation method analyzes the tangent function of the phase to be measured to extract the phase to be evaluated. It is necessary to eliminate the background light intensity of interference fringes, which has a significant impact on phase reconstruction accuracy. A random three-step phase shift algorithm (RTP) is suggested in this study. The phase shift between two adjacent interference fringes is extracted using the least squares approach in conjunction with a K-order twodimensional polynomial. Additionally, it employs the interference fringe graph’s difference operation to reduce the background light intensity and actualize the restoration of the measurement phase. The experimental and simulations results reveal that phase shift, luminous non-uniformity, and random noise have little effect on the random three-step phase shift method and have strong environmental adaptability.

Publisher

American Scientific Publishers

Subject

Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials

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