Results 11 to 20 of about 7,193 (177)

Experimental determination of vibration characteristics of turbine blades with an immunity digital speckl interferometer

open access: yesАвіаційно-космічна техніка та технологія, 2021
The paper notes the wide possibilities and high efficiency of vibration diagnostics of parts and assemblies of power units by the method of electronic speckle interferometry (ESI), shows the feasibility of developing and improving methods for obtaining ...
Михаил Романович Ткач   +5 more
doaj   +1 more source

DSPI Filtering Evaluation Method Based on Sobel Operator and Image Entropy

open access: yesIEEE Photonics Journal, 2021
Evaluating the filtering process of the digital speckle pattern interferometry (DSPI) of a single image by the traditional methods can result in under- or over-filtering.
Runkai Zhang   +3 more
doaj   +1 more source

Surface Displacement Measurements of Artworks: New Data Processing for Speckle Pattern Interferometry

open access: yesApplied Sciences, 2022
Curators have developed preventive conservation strategies and usually try to control the temperature (T) and relative humidity (RH) variations in the museum rooms to stabilise the artworks.
Jessica Auber--Le Saux   +5 more
doaj   +1 more source

Dynamic Deformation Measurement of Specular Surface with Deflectometry and Speckle Digital Image Correlation

open access: yesSensors, 2020
The deformation measurement of a specular surface is of great importance during the quality inspection and installation of optical elements or wafers, especially those with large apertures.
Yao Hu   +4 more
doaj   +1 more source

Measurement of linear shear through optical vortices in digital shearing speckle pattern interferometry.

open access: yesOptics Express, 2023
Digital shearing speckle pattern interferometry (DSSPI) is a powerful interferometric technique used to visualize the slope contours undergoing static and dynamic deformations.
Xin Tang   +5 more
semanticscholar   +1 more source

Vibration Measurements by Self-Mixing Interferometry: An Overview of Configurations and Benchmark Performances

open access: yesVibration, 2023
Self-mixing interferometry (SMI) is suitable to sense and measure vibrations of amplitudes ranging from picometers to millimeters at frequencies from sub-Hz to MHz’s.
Silvano Donati
doaj   +1 more source

Effect of the Speckle Size on the Quality of Speckle Pattern in DSPI System

open access: yesIEEE Access, 2019
In order to detect the deformation and strain of materials accurately, the key is to obtain the phase information caused by dynamic loading in digital speckle pattern interferometry (DSPI).
Zhisong Li   +5 more
doaj   +1 more source

Digital Shearing Speckle Pattern Interferometry Based on Rochon Prism and Its Application

open access: yesApplied Sciences, 2019
This paper presents improved digital shearing speckle pattern interferometry based on Rochon Prism. The advantage of this method is that it avoids the shadow noise caused by transmission light, which improves the shearography accuracy.
Xu Wang   +7 more
doaj   +1 more source

Interferometric Quantification of the Impact of Relative Humidity Variations on Cultural Heritage

open access: yesHeritage, 2022
It has been shown that Relative Humidity (RH) provokes dimensional displacement detectable directly from surfaces using holographic interferometry.
Vivi Tornari
doaj   +1 more source

Digital Double-Pulse Holographic Interferometry for Vibration Analysis

open access: yesShock and Vibration, 1996
Different arrangements for double-pulsed holographic and speckle interferometry for vibration analysis will be described. Experimental results obtained with films (classical holographic interferometry) and CCD cameras (digital holographic interferometry)
H.J. Tiziani, G. Pedrini
doaj   +1 more source

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