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
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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
Holographic interferometry study of the dissolution and diffusion of gypsum in water [PDF]
Geochimica and Cosmochimica Acta 71 (2007) 1913-1920, 2009 We have performed holographic interferometry measurements of the dissolution of the (010) plane of a cleaved gypsum single crystal in pure water. These experiments have provided the value of the dissolution rate constant k of gypsum in water and the value of the interdiffusion coefficient D of its aqueous species in water.
arxiv +1 more source
On the Digital Holographic Interferometry of Fibrous Material, I. Optical Properties of Polymer and Optical Fibers [PDF]
Optics and Lasers in Engineering 48 (2010) 555-560, 2012 The digital holographic interferometry (DHI) was utilized for investigating the optical properties of polymer and optical fibers. The samples investigated here were polyvinylidene fluoride (PVDF) polymer fiber and graded-index (GRIN) optical fiber. The phase shifting Mach-Zehnder interferometer was used to obtain five phase-shifted holograms, in which ...
arxiv +1 more source
Passive introduction of carrier fringes in real-time photo refractive interferometers for single interferogram analysis [PDF]
Journal of the European Optical Society-Rapid Publications, 2006 We propose a new technique to introduce carrier fringes in an holographic interferometric set-up for deformation or vibration analyses. This technique makes use of the anisotropic diffraction processes of photorefractive crystals.
Pauliat Gilles +3 more
doaj +1 more source
Identification of temperature field in thermoacoustic generator
EPJ Web of Conferences, 2014 Presented paper includes description of design and assemblage of an experimental device for measuring temperature field into thermoacoustic generator using holographic interferometry method.
Veselý Martin +3 more
doaj +1 more source
Verification of ESPI Stress Analysis by Means Of FEM [PDF]
Transactions of the VŠB-Technical University of Ostrava, Mechanical Series, 2013 The main goal of this paper is verification of accuracy of ESPI strain sensor Dantec dynamics Q-100. ESPI is the digital holographic interferometry method for measuring small displacements and deformations.
Luboš PEČENKA +2 more
doaj +1 more source