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Precision measurement of angle using digital speckle pattern interferometry
Ninth International Symposium on Precision Mechanical Measurements, 2019A non-contact and non-cooperative method of angle measurement based on digital speckle pattern interferometry (DSPI) was introduced in this paper. Studies have shown that when the illumination angle of the DSPI system was every small, the angle can be determined according to the interferometric phase distribution and the length of the measured object ...
Fan Wu, Sijin Wu, Weixian Li, Xin Li
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Spatiotemporal three-dimensional phase unwrapping in digital speckle pattern interferometry
Optics Letters, 2016We propose a hybrid spatiotemporal three-dimensional phase unwrapping algorithm for use in digital speckle pattern interferometry (DSPI). The feature of the proposed algorithm is the integration of one-dimensional temporal and two-dimensional spatial phase unwrapping algorithms.
Sijin, Wu +3 more
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Measuring material thickness changes through tri-aperture digital speckle pattern interferometry
Optical Engineering: The Journal of SPIE, 2023. A configuration for the measurement of thickness changes in materials through one-shot digital speckle pattern interferometry (DSPI) was developed. The phase maps calculation was made by adding carrier fringes by the multiple aperture principle and ...
E. S. Barrera, J. E. Cuello
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Optics Communications, 2021
In the present study, a brief, efficient and synchronous 3D (three-dimensional) deformation measurement method based on digital speckle pattern interferometry (DSPI) and digital shear speckle interference (DSSPI) was proposed.
Zhisong Li +5 more
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In the present study, a brief, efficient and synchronous 3D (three-dimensional) deformation measurement method based on digital speckle pattern interferometry (DSPI) and digital shear speckle interference (DSSPI) was proposed.
Zhisong Li +5 more
semanticscholar +1 more source
SPIE/COS Photonics Asia, 2022
Digital speckle pattern interferometry (DSPI) is a full-field optical testing technique that can be used to measure tiny deformations and strains. It has been widely used in aerospace, precision manufacturing and other fields.
Yang Yan +5 more
semanticscholar +1 more source
Digital speckle pattern interferometry (DSPI) is a full-field optical testing technique that can be used to measure tiny deformations and strains. It has been widely used in aerospace, precision manufacturing and other fields.
Yang Yan +5 more
semanticscholar +1 more source
Smooth Surface Defect Detection of Metal Workpiece Based on Digital Speckle Pattern Interferometry
Journal of Physics: Conference Series, 2022When the existing defect detection methods are used to detect the defects on the smooth surface of metal workpieces, there is a big difference between the detection results and the actual results, and the detection accuracy is low. Therefore, the digital
Mianqian Jia
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Digital speckle-pattern shearing interferometry
Applied Optics, 1980An application of digital image processing techniques to speckle-shearing interferometry is described. A present system consists of an image-shearing camera using a Fresnel biprism of small angles and a digital TV-image processing facility. This interferometer makes it easy to measure in quasi-real-time spatial derivatives of surface displacement and ...
S, Nakadate, T, Yatagai, H, Saito
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Simultaneous and precision measurement of yaw and pitch using digital speckle pattern interferometry
, 2021. A method of simultaneous and precision measurement of yaw and pitch based on digital speckle pattern interferometry is proposed. The relationship between the yaw/pitch and phase distribution is analyzed in detail, resulting in the establishment of the ...
Fan Wu, Sijin Wu, Weixian Li, Xin Li
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Multilaser digital speckle pattern interferometry system
SPIE Proceedings, 2005A novel digital speckle pattern interferometry system including multi lower power He-Ne lasers to measure large object is presented in this paper. Multi lower power He-Ne lasers and optical switches are set in it. Through the control of computer, the different laser can illuminate the different area of large object at different time.
Shuhai Jia, Junwu Zhao, Xin Wang
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, 2021
. Digital speckle pattern interferometry (DSPI) is a widely used technique in various high-precision nondestructive testing applications. However, a coherence multiplicative noise, called speckle noise, is produced. Speckle noise degrades the quality and
Mustapha Bahich, Mohammed Bailich
semanticscholar +1 more source
. Digital speckle pattern interferometry (DSPI) is a widely used technique in various high-precision nondestructive testing applications. However, a coherence multiplicative noise, called speckle noise, is produced. Speckle noise degrades the quality and
Mustapha Bahich, Mohammed Bailich
semanticscholar +1 more source