Phase Shifting Approaches and Multi-Channel Interferograms Position Registration for Simultaneous Phase-Shifting Interferometry: A Review

Bai, Fuzhong; Lang, Jiwei; Gao, Xiaojuan; Zhang, Yang; Cai, Jiahai; Wang, Jianxin

doi:10.3390/photonics10080946

Cited by 4 publications

(1 citation statement)

References 60 publications

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“…One significant drawback is that the size of the optical elements is directly dependent on the size of the surface being measured when inspecting flat and convex surfaces [ 38 ]. Additionally, the air path section between the interferometer and measured object may experience vibrations and phase inhomogeneities, reducing the reliability of the interference methods [ 39 , 40 ]. Hence, photogrammetric methods, namely those using structured light, were chosen.…”

Section: Methodsmentioning

confidence: 99%

An Error Estimation System for Close-Range Photogrammetric Systems and Algorithms

Poroykov,

Pechinskaya,

Shmatko

et al. 2023

Sensors

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Close-range photogrammetry methods are widely used for non-contact and accurate measurements of surface shapes. These methods are based on calculating the three-dimensional coordinates of an object from two-dimensional images using special digital processing algorithms. Due to the relatively complex measurement principle, the accurate estimation of the photogrammetric measurement error is a non-trivial task. Typically, theoretical estimations or computer modelling are used to solve this problem. However, these approaches cannot provide an accurate estimate because it is impossible to consider all factors that influence the measurement results. To solve this problem, we propose the use of physical modelling. The measurement results from the photogrammetric system under test were compared with the results of a more accurate reference measurement method. This comparison allowed the error to be estimated under controlled conditions. The test object was a flexible surface whose shape could vary smoothly over a wide range. The estimation of the measurement accuracy for a large number of different surface shapes allows us to obtain new results that are difficult to obtain using standard approaches. To implement the proposed approach, a laboratory system for the error estimation of close-range photogrammetric measurements was developed. The paper contains a detailed description of the developed system and the proposed technique for a comparison of the measurement results. The error in the reference method, which was chosen to be phasogrammetry, was evaluated experimentally. Experimental testing of the stereo photogrammetric system was performed according to the proposed technique. The obtained results show that the proposed technique can reveal dependencies that may not be detected by standard approaches.

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Section: Methodsmentioning

confidence: 99%

An Error Estimation System for Close-Range Photogrammetric Systems and Algorithms

Poroykov,

Pechinskaya,

Shmatko

et al. 2023

Sensors

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Design of a three-channel pixelated phase mask and single-frame phase extraction technique

Wang,

Tian,

Liu

et al. 2024

Optics and Lasers in Engineering

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Dynamic deformation measurement with 2-frame phase-shifting speckle interferometry based on speckle statistics and wavefront multiplexing

Du,

Li,

Fan

et al. 2024

Review of Scientific Instruments

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Phase-shifting speckle interferometry could achieve full-field deformation measurement of rough surfaces. To meet the dynamic requirement and further improve the accuracy, a two-step synchronous phase-shifting measurement system is established based on the polarization-sensitive phase modulation ability of a liquid crystal spatial light modulator; by multiplexing the reference wavefront, an accurate phase shift is generated between two independent recording channels, and a common-path self-reference vortex interference structure is built for precise spatial registration. Meanwhile, according to the speckle statistical principle, a novel two-frame phase-shifting algorithm as well as a two-step spatial registration strategy is presented to strengthen the robustness of intensity and position differences caused by spatial-multiplexing; thereby, accurate transient deformation can be directly obtained from phase-shifting speckle interferograms recorded before and after deformation. The effectiveness and accuracy of the proposal are validated from the out-of-plane deformation measurement experiment by comparing with the traditional two-step and four-step phase-shifting methods. The dynamic ability is exhibited through reconstructing mechanical and thermal deformations across various application scenarios.

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Phase Shifting Approaches and Multi-Channel Interferograms Position Registration for Simultaneous Phase-Shifting Interferometry: A Review

Cited by 4 publications

References 60 publications

An Error Estimation System for Close-Range Photogrammetric Systems and Algorithms

An Error Estimation System for Close-Range Photogrammetric Systems and Algorithms

Design of a three-channel pixelated phase mask and single-frame phase extraction technique

Dynamic deformation measurement with 2-frame phase-shifting speckle interferometry based on speckle statistics and wavefront multiplexing

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