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A novel dual-phase retrieval method for fluctuation-resistant dual-wavelength random phase-shifting interferometry.

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Bibliographic Details
Title: A novel dual-phase retrieval method for fluctuation-resistant dual-wavelength random phase-shifting interferometry.
Authors: Xu, Xiaoqing1 (AUTHOR) xxqyzzd@sina.com, Zhou, Yi1,2 (AUTHOR)
Source: Journal of Modern Optics. Nov/Dec2025, Vol. 72 Issue 19-21, p889-899. 11p.
Subjects: Phase-shifting interferometry, Wavelengths, Microspheres, Least squares
Abstract: The coupled effect of random phase-shift errors and fluctuation errors has a significant impact on the accuracy of dual-phase extraction in fluctuation-resistant dual-wavelength phase-shifting interferometry. To compensate for these two errors, a novel dual-phase retrieval method (DPRM) using the least-squares algorithm is proposed. This method not only can address dual-wavelength-multiplexed interferograms with random phase shifts but also can cope with dual-wavelength interferograms possessing the fluctuation errors. The phases and the phase shifts at each wavelength with high accuracy can be obtained with DPRM. Subsequently, the phase of the longer or shorter synthetic wavelength, which is yielded by subtraction or addition operation, respectively, is investigated. Finally, the feasibility and applicability of DPRM are demonstrated by the micro-sphere, the HeLa cell and the spherical cap, respectively. Moreover, discussions on iterative issue and synthetic phase issue of DPRM are also presented. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:The coupled effect of random phase-shift errors and fluctuation errors has a significant impact on the accuracy of dual-phase extraction in fluctuation-resistant dual-wavelength phase-shifting interferometry. To compensate for these two errors, a novel dual-phase retrieval method (DPRM) using the least-squares algorithm is proposed. This method not only can address dual-wavelength-multiplexed interferograms with random phase shifts but also can cope with dual-wavelength interferograms possessing the fluctuation errors. The phases and the phase shifts at each wavelength with high accuracy can be obtained with DPRM. Subsequently, the phase of the longer or shorter synthetic wavelength, which is yielded by subtraction or addition operation, respectively, is investigated. Finally, the feasibility and applicability of DPRM are demonstrated by the micro-sphere, the HeLa cell and the spherical cap, respectively. Moreover, discussions on iterative issue and synthetic phase issue of DPRM are also presented. [ABSTRACT FROM AUTHOR]
ISSN:09500340
DOI:10.1080/09500340.2025.2528846