Results 31 to 40 of about 476,683 (323)
Residual stress measurement on the butt-welded area by electronic speckle pattern interferometry
Nuclear Engineering and Technology, 2015 Background: Residual stress always exists on any kind of welded area. This residual stress can cause the welded material to crack or fracture. For many years, the hole-drilling method has been widely used for measuring residual stress.
Kyeongsuk Kim +3 more
doaj +1 more source
Speckle interferometry at SOAR in 2019 [PDF]
2020, AJ, 160, 7, 2020 The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2019 are given, totaling 2555 measurements of 1972 resolved pairs with separations from 15 mas (median 0.21") and magnitude difference up to 6 mag, and non-resolutions of 684 targets.
arxiv +1 more source
Generation of highly mutually coherent hard x-ray pulse pairs with an amplitude-splitting delay line [PDF]
Physical Review Research 3.4 (2021): 043050, 2021 Beam splitters and delay lines are among the key building blocks of modern-day optical laser technologies. Progress in x-ray free electron laser source development and applications over the past decade is calling for their counter part operating in the Angstrom wavelength regime.
arxiv +1 more source
Digital Double-Pulse Holographic Interferometry for Vibration Analysis
Shock 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
Artificial Neural Networks Application in Modal Analysis of Tires
Measurement Science Review, 2013 The paper deals with the application of artificial neural networks (ANN) to tires’ own frequency (OF) prediction depending on a tire construction. Experimental data of OF were obtained by electronic speckle pattern interferometry (ESPI).
Koštial P. +5 more
doaj +1 more source
Temporal electronic speckle pattern interferometry for real-time in-plane rotation analysis.
Optics Express, 2018 A temporal electronic speckle pattern interferometry (ESPI) system is proposed for in-plane rotation measurement. The relationship between the rotation angle and the phase change distribution is established and the rotation direction is indicated by the ...
Shengjia Wang +5 more
semanticscholar +1 more source
The impact of speckle disorder on a superfluid Fermi system [PDF]
Phys. Rev. B 100, 045149 (2019), 2018 Optical lattice experiments which probe the effect of disorder on superfluidity often use a speckle pattern for generating the disorder. Such speckle disorder is spatially correlated. While fermionic superfluidity in the presence of uncorrelated disorder is well studied, the impact of correlated disorder, particularly on thermal properties of the ...
arxiv +1 more source
Windowed defocused photographic speckle vibration measurement [PDF]
Applied Optics, Vol. 48 Issue 30, pp.5853-5862 (2009), 2014 The out-of-plane vibration of a rough surface causes an in-plane vibration of its speckle pattern when observed with a defocused optical photographic system. If the frequency of the oscillations is high enough, a time-averaged specklegram is recorded from which the amplitude of the vibration can be estimated.
arxiv +1 more source
ConvNets for Counting: Object Detection of Transient Phenomena in Steelpan Drums [PDF]
, 2021 We train an object detector built from convolutional neural networks to count interference fringes in elliptical antinode regions in frames of high-speed video recordings of transient oscillations in Caribbean steelpan drums illuminated by electronic speckle pattern interferometry (ESPI).
arxiv +1 more source
ESPI nondestructive testing for coating interface failure
工程科学学报, 2016 A detection platform of coating failure processes was designed and constructed on the basis of laser electronic speckle pattern interferometry(ESPI).
GAO Jin +4 more
doaj +1 more source