Results 31 to 40 of about 107,717 (203)

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

THERMAL DEFORMATION WAVES IN HETEROGENEOUS MATERIALS [PDF]

open access: yesJournal of Engineering Science (Chişinău), 2018
In the paper, a stress-strain detection method is used by correlation point interferometry, inwhich the resolution of the recording surface changes has been significantly (ten times) improved. This result was obtained
V. Zhukovsky   +3 more
doaj   +1 more source

Surface profile measurement using spatially dispersed short coherence interferometry [PDF]

open access: yes, 2013
Improved online techniques for surface profile measurement can be beneficial in many high/ultra-precision manufacturing in terms of enabling manufacture and reducing costs.
Martin, Haydn   +2 more
core   +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

Computational de-noising based on deep learning for phase data in digital holographic interferometry

open access: yesAPL Photonics, 2020
This paper presents a deep-learning-based algorithm dedicated to the processing of speckle noise in phase measurements in digital holographic interferometry.
Silvio Montresor   +3 more
doaj   +1 more source

Fast surface measurement using wavelength scanning interferometry with compensation of environmental noise [PDF]

open access: yes, 2010
We introduce a new optical interferometry system for fast areal surface measurement of microscale and nanoscale surfaces that are immune to environmental noise.
Gao, F.   +5 more
core   +1 more source

Study of microscale surface morphology changing of the retroreflector in EAST by means of laser speckle interferometry technique

open access: yesNuclear Materials and Energy, 2021
The retroreflectors in EAST (Experimental Advanced Superconducting Tokamak) are important optical components of Polarimeter-Interferometer (POINT) system, working as the first mirrors to reflect the incident far-infrared laser.
Hongbei WANG   +6 more
doaj   +1 more source

Comparison study of algorithms and accuracy in the wavelength scanning interferometry [PDF]

open access: yes, 2012
Wavelength scanning interferometry (WSI) can be used for surface measurement with discontinuous surface profiles by producing phase shifts without any mechanical scanning process.
Gao, F.   +4 more
core   +1 more source

Phase extraction in dynamic speckle interferometry: proposal of a road map

open access: yesEPJ Web of Conferences, 2010
Of all the two-beam interference patterns, the ones obtained in speckle interferometry (SI) are the most difficult to be phase-demodulated. Many solutions exist in classical smooth-wave interferometry and alike techniques, both in static and dynamic ...
Jacquot P., Equisa S.
doaj   +1 more source

Quantitative analysis of speckle-based X-ray dark-field imaging using numerical wave-optics simulations

open access: yesScientific Reports, 2021
The dark-field signal measures the small-angle scattering strength and provides complementary diagnostic information. This is of particular interest for lung imaging due to the pronounced small-angle scatter from the alveolar microstructure.
Sebastian Meyer   +4 more
doaj   +1 more source

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