Results 31 to 40 of about 190,665 (333)
Digital holografic interferometry used for identification of 2D temperature field
EPJ Web of Conferences, 2012 The presented paper shows the possibility of digital holographic interferometry application in measurement of unsteady 2D temperature field generated by pulsatile flow which is impinging heated surface.
Psota Pavel +3 more
doaj +1 more source
Holographic measurement of surface acoustic wave parameters in crystals [PDF]
Modern Electronic Materials, 2019 The theoretical basis of a specialized technique for applying digital holographic interferometry to measure the parameters of surface acoustic waves is presented, a measuring system for visualization and quantitative analysis of the parameters of ...
Michael E. Gusev, Yuri N. Zakharov
doaj +3 more sources
Singular value demodulation of phase-shifted holograms [PDF]
, 2015 We report on phase-shifted holographic interferogram demodulation by singular value decomposition. Numerical processing of optically-acquired interferograms over several modulation periods was performed in two steps : 1- rendering of off-axis complex ...
Atlan, Michael, Lopes, Fernando
core +10 more sources
Deep Learning Network for Speckle De-Noising in Severe Conditions
Journal of Imaging, 2022 Digital holography is well adapted to measure any modifications related to any objects. The method refers to digital holographic interferometry where the phase change between two states of the object is of interest.
Marie Tahon +2 more
doaj +1 more source
Journal of Saudi Chemical Society, 2016 Optical interferometry techniques were used to measure the surface resistivity/conductivity of carbon steel samples in blank seawater and in seawater with different concentrations of a corrosion inhibitor, without any physical contact. The measurement of
Khaled Habib
doaj +1 more source
Towards Reduced CNNs for De-Noising Phase Images Corrupted with Speckle Noise
Photonics, 2021 Digital holography is a very efficient technique for 3D imaging and the characterization of changes at the surfaces of objects. However, during the process of holographic interferometry, the reconstructed phase images suffer from speckle noise.
Marie Tahon +2 more
doaj +1 more source
Fluctuations of spacetime and holographic noise in atomic interferometry [PDF]
Gen.Rel.Grav.43:2065-2088,2011, 2009 Space--time can be understood as some kind of space--time foam of fluctuating bubbles or loops which are expected to be an outcome of a theory of quantum gravity. One recently discussed model for this kind of space--time fluctuations is the holographic principle which allows to deduce the structure of these fluctuations.
arxiv +1 more source
Reflections about holographic and non-holographic acquisition of surface topography [PDF]
arXiv, 2021 Recording and (computational) processing of complex wave fields offers a vast realm of new optical methods. Also for optical 3D-metrology. We discuss fundamental similarities and differences of holographic surface topography measurement versus non-holographic principles, such as triangulation, classical interferometry, rough surface interferometry and ...
arxiv
Fiber-optic vector acoustic receiver based on adaptive holographic interferometer [PDF]
, 2021 A mobile scalar-vector acoustic receiver is proposed, experimentally implemented and investigated. The key components of the receiver are (i) the six-channel fiber-optic coil-type sensor configured as to detect three projections of acoustic intensity vector, (ii) the six-channel optical phase demodulator based on six-channel adaptive holographic ...
arxiv +1 more source
Digital Holographic Interferometry for Micro-Deformation Analysis of Morpho Butterfly Wing [PDF]
arXiv, 2023 In this study, we present a detailed analysis of deflections in a butterfly wing utilizing digital holographic interferometry. Our methodology revolves around an off-axis lensless Fourier holographic setup, and we employ laser excitation to induce deflections in the object.
arxiv