Oswald Leroy

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Oswald Leroy is affiliated with the following schools: Ghent University, University of Liège

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Oswald Leroy

Mathematics

#8414

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#11441

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Number Theory

#433

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#534

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Algebra

#735

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#961

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Measure Theory

#4076

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#4802

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Mathematics

Oswald Leroy's Degrees

Masters Mathematics University of Liège

Why Is Oswald Leroy Influential?

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According to Wikipedia, Oswald Jozef Leroy was a Belgian mathematician known for his contributions to theoretical acousto-optics. Leroy's biggest achievement was a theoretical study of the interaction of light with two adjacent ultrasonic beams under different conditions in terms of beam shape, frequency content and intensity. Understanding of this phenomenon was very important in the 1970s when new acousto-optic devices were developed that utilized adjacent ultrasonic beams. Such devices were being used in optical modulators, optical scanners, information processing , optical filtering and frequency-spectrum analysis. Before his contribution only the interaction of light with one ultrasonic beam was understood. Since then, acousto-optic devices have been used in telecommunication and military applications.

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Oswald Leroy's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

Reflection and transmission of bounded sound beams on half‐spaces and through plates (1982) (55)
Diffraction of ultrasonic waves from periodically rough liquid–solid surface (1983) (54)
Bounded beam interaction with thin inclusions. Characterization by phase differences at Rayleigh angle incidence. (2000) (42)
The history and properties of ultrasonic inhomogeneous waves (2005) (40)
A theoretical study of special acoustic effects caused by the staircase of the El Castillo pyramid at the Maya ruins of Chichen-Itza in Mexico. (2004) (39)
Reflection and transmission of normally incident ultrasonic waves on periodic solid–liquid interfaces (1988) (38)
Ultrasonic polar scans as a possible means of non-destructive testing and characterisation of composite plates (2003) (34)
Theoretical verification of the backward displacement of waves reflected from an interface having superimposed periodicity (2003) (30)
Diffraction of homogeneous and inhomogeneous plane waves on a doubly corrugated liquid/solid interface. (2005) (30)
Ultrasonic polar scans: numerical simulation on generally anisotropic media. (2006) (27)
Enhanced anisotropy in Paratellurite for inhomogeneous waves and its possible importance in the future development of acousto-optic devices. (2006) (24)
Theory of the backward beam displacement on periodically corrugated surfaces and its relation to leaky Scholte-Stoneley waves (2004) (23)
Plane-wave analysis of the near field of light diffracted by ultrasound. (1992) (20)
Theoretical and experimental study of ultrasonic surface modes at a solid-fluid periodic interface (1988) (20)
Conversion of a Stoneley wave at the extremity of a fluid loaded plate (1997) (19)
On the origin of the anomalies in the reflected ultrasonic spectra from periodic surfaces (1989) (19)
Simulations of harmonic and pulsed ultrasonic polar scans (2006) (19)
On the near-field of light-diffraction by an ultrasonic phase-amplitude grating - theory and experiment (1991) (18)
Complex harmonic wave scattering as the framework for investigation of bounded beam reflection and transmission at plane interfaces and its importance in the study of vibrational modes (1993) (18)
The reflection of bounded inhomogeneous waves on a liquid/solid interface. (2003) (18)
On the influence of fatigue on ultrasonic polar scans of fiber reinforced composites. (2004) (18)
Experimental verification of the calculated diffraction field generated by inhomogeneous waves obliquely incident on a periodically rough liquid–solid boundary (1999) (17)
Inhomogeneous plane-wave scattering and mode stimulation on periodic rough surfaces (1996) (16)
Diffraction of light by adjacent fundamental and second or fourth harmonic ultrasound beams: Comparison of exact and simplified formulae with experiment (1982) (15)
On the influence of frequency and width of an ultrasonic bounded beam in the investigation of materials: Study in terms of heterogeneous plane waves (1993) (15)
Energy conservation for inhomogeneous plane waves (1988) (14)
Mode theory as a framework for the investigation of the generation of a Stoneley wave at a liquid–solid interface (1994) (14)
Inhomogeneous waves in piezoelectric crystals (2005) (14)
THIN LAYER THICKNESS MEASUREMENTS BASED ON THE ACOUSTO-OPTIC TECHNIQUE (1996) (13)
Diffraction of light by ultrasound at oblique-incidence - a mn-order approximation method (1987) (13)
Experimental study of inhomogeneous wave reflection from a solid-air periodically rough boundary using leaky Rayleigh waves (1994) (13)
Experimental verification of the theory of multilayered Rayleigh waves (1999) (13)
Light diffraction by ultrasonic pulses: Analytical and numerical solutions of the extended Raman-Nath equations (1990) (13)
The use of polarized bounded beams to determine the groove direction of a surface corrugation at normal incidence, the generation of surface waves and the insonification at Bragg-angles. (2002) (12)
Diffraction of light by supersonic waves: The solution of the raman-nath equations—I (1968) (12)
Study of the scattering of leaky Rayleigh waves at the extremity of a fluid-loaded thick plate (2004) (12)
Theoretical acousto-optics in Belgium (1992) (12)
A dozen Bragg effects in tellurium dioxide single crystal (1998) (11)
A theoretical elucidation for the experimentally observed backward displacement of waves reflected from an interface having superimposed periodicity (2002) (11)
The Laplace transform to describe bounded inhomogeneous waves (2004) (11)
Surface roughness determination using the acousto-optic technique: Theory and experiment (1997) (10)
Extension of the mode method for viscoelastic media and focused ultrasonic beams. (2000) (10)
Diffraction of light by two parallel adjacent ultrasonic waves, having the same wavelengths (1974) (10)
Acousto‐optic technique: A new nondestructive technique to evaluate thin layered structures (1995) (10)
Air-coupled ultrasonic testing of diffusion bonds. (2002) (10)
General symmetry properties of the diffraction pattern in the diffraction of light by parallel adjacent ultrasonic beams (1973) (10)
Diffraction of light by ultrasound - finite analytical expressions for the spectra up to order-3 (1985) (9)
A liquid wedge as generating technique for Lamb and Rayleigh waves (1997) (9)
The schoch effect to distinguish between different liquids in closed containers. (2004) (8)
Diffraction of horizontally polarized ultrasonic plane waves on a periodically corrugated solid-liquid interface for normal incidence and Brewster angle incidence (2002) (8)
Thin coating characterization by Rayleigh waves: an analytical model based on normal-mode theory. (2001) (8)
The acousto-optical interaction of narrow laser beams under Raman-Nath conditions (2001) (8)
Diffraction of light by adjacent parallel ultrasonic-waves with arbitrary frequencies (noa-method) (1972) (8)
Theory of the diffraction of light by ultrasonic waves consisting of a fundamental tone and its first n — 1 harmonics (1972) (7)
Symmetry of diffraction pattern obtained by diffraction of light by ultrasonic-waves (1973) (7)
Amplitude modulation of diffracted light waves caused by adjacent ultrasonic beams of frequency ratio 1:n (1981) (7)
Detection of Fiber Direction in Composites by Means of a High-Frequency Wide-Bounded Ultrasonic Beam and Schlieren Photography (2005) (7)
The double-sided ultrasonic beam displacement (2004) (7)
Acoustic Interactions with Submerged Elastic Structures: Part IV: Nondestructive Testing, Acoustic Wave Propagation and Scattering (2002) (7)
Acoustically induced light polarization effects in isotropic media (1995) (6)
Influence of an inclusion on the phase of a Stoneley wave (1997) (6)
Schlieren photography to study sound interaction with highly absorbing materials. (2005) (6)
Diffraction of complex harmonic plane waves and the stimulation of transient leaky Rayleigh waves (2005) (6)
Diffraction of light by ultrasound at oblique-incidence - an exact 4-order solution (1986) (5)
The representation of 3D gaussian beams by means of inhomogeneous waves. (2004) (5)
Optical polarization effects in isotropic media with acoustically induced birefringence (1999) (5)
Characterization of layered orthotropic materials using ultrasonic polar scans (2002) (5)
Light diffraction by one ultrasonic wave: Laplace transform method (1984) (5)
Reflection of inhomogeneous plane ultrasonic waves on periodically rough solid-vacuum interfaces (1992) (5)
Light diffraction and polarization effects in isotropic media with acoustically induced anisotropy (1996) (5)
A fundamental study of the excitation of a Stoneley wave at a liquid–solid interface: Rayleigh angle and Gaussian beam incidence (1994) (5)
On the theoretical possibility to apply an acoustic diffraction grating as a complex frequency filter device for electronic signals. (2005) (5)
Physical Acoustics: Fundamentals And Applications (2012) (5)
Numerical and experimental comparison of polarization effects in ultrasonic light diffraction in intermediate range in isotropic SiO2 (1995) (4)
Ultrasonic control of light polarization in fused silica (1994) (4)
Sound in biased piezoelectric materials of general anisotropy (2005) (4)
Diffraction of light by two superposed parallel ultrasonic waves, having arbitrary frequencies. General symmetry properties; method of solution by series expansion (1968) (4)
Bounded beam interaction with plate-edge at lamb angle (2005) (4)
Stoneley wave excitation by a bounded beam at the down-step of a thin layer on a substrate (1997) (4)
Diffraction of light by phase-shifted adjacent ultrasound beams; ρ ⪢ 1 (1982) (4)
Influence of planar cracks in plates on reflected and transmitted fields of Gaussian acoustic beams. (2003) (4)
Direct optical-characterization of ultrasonic waves using Raman-nath diffraction of convergent light (1991) (4)
Acousto-optic method for nondestructive testing (1984) (4)
Numerical simulations of ultrasonic polar scans (2004) (4)
Acoustic Interactions with Submerged Elastic Structures (2004) (4)
A feasibility study of the use of bounded beams resembling the shape of evanescent and inhomogeneous waves. (2011) (3)
Strong interaction of arbitrary fields of sound and light: Application to higher‐order Bragg imaging (1994) (3)
Surface and plate mode stimulation in piezoelectric materials in the framework of inhomogeneous wave theory (2004) (3)
The principle of a chopped series equilibrium to determine the expansion coefficients in the inhomogeneous waves decomposition of a bounded beam (2003) (3)
A useful analytical description of the coefficients in an inhomogeneous wave decomposition of a symmetrical bounded beam. (2005) (3)
Optical measurement of the reflection coefficient for bounded acoustic waves (1984) (3)
STUDY OF THE BEHAVIOUR OF INHOMOGENEOUS HARMONIC WAVES IN THEIR DIFFRACTION FROM SIMPLE ROUGH SURFACES (1992) (3)
Focal length control of complex harmonic and complex pulsed ultrasonic bounded beams (2005) (3)
Amplitude-time-modulation of a diffracted laserbeam by 2 ultrasonic-waves with opposite directions and frequency ratio 1-n (1984) (3)
ON THE THEORETICAL DISCOVERY OF A NEW KIND OF LEAKY SURFACE WAVES (2003) (3)
Higher Order Bragg Diffraction of Light by Ultrasound: Theory and Experiment (1993) (3)
The generation of a Stoneley wave at the end of a fluid loaded plate by an incident bounded beam (1997) (2)
Diffraction of plane waves having complex frequency and the excitation of transient leaky Rayleigh waves (2004) (2)
Radiation Mode Model for Multilayered Structures (2001) (2)
Generalized Snell’s law and its possible relation to coherent backscattering of ultrasonic waves (2004) (2)
The Calculation of Molecular Parameters from Acoustically Induced Optical Diffraction Data (1977) (2)
Efficiency of acousto-optic interaction in the second-order diffraction (1996) (2)
Near field of light diffracted by ultrasound in an isotropic medium with acoustically induced anisotropy (1998) (2)
Diffraction of intense laserlight by an ultrasonic wave in the case of large ultrasonic wavelengths (1977) (2)
The radiation mode theory in ultrasonics (2005) (2)
The Mode Method in the Theory of Acoustic Wave Diffraction on Division Boundaries Between Different Structures (1991) (2)
How to choose a square root in calculating the reflection coefficient for a lossy liquid–lossless isotropic solid interface (1980) (2)
Probing of ultrasonic pulses by multidirectional light (1991) (2)
Double Bragg and Bragg/normal diffraction of two laser beams by ultrasound (1984) (2)
Nonspecular Reflection-Transmission Phenomena of Bounded Beams Described by Inhomogeneous Plane Waves (1996) (2)
The interaction of inhomogeneous waves and Gaussian beams with mud in between a hard solid and an ideal liquid (2004) (2)
Frequency band gap for Rayleigh waves on coated substrates (2004) (1)
A double leaky type of surface wave on brass immersed in water (2006) (1)
The interaction of ultrasound with mud in between hard solid and ideal liquid (2005) (1)
The influence of coating thickness on the phase shift of bounded ultrasonic beams: comparison between Fourier analysis and inhomogeneous plane wave theory (2003) (1)
The Thomson-Haskell method to simulate bounded beam interactions on layered media (2005) (1)
PROFILED PLANE WAVES AS THE FRAMEWORK FOR THE INTERACTION OF 3D BOUNDED BEAMS WITH ANISOTROPIC MATERIALS (2004) (1)
The diffraction of light by two adjacent parallel ultrasonic waves, one being a fundamental tone and the other its second harmonic (1978) (1)
Diffraction of Light by Two Adjacent Parallel Ultrasonic Waves (1972) (1)
The construction of self-adjoint operators of Hill with periodic eigenfunctions (1977) (1)
On the ability of bounded inhomogeneous waves to experimentally verify the behavior of infinite inhomogeneous plane waves (2003) (1)
Fiber direction determination in composites by means of Schlieren photography (2005) (1)
Ultrasonic inhomogeneous waves: Three decades of fascination (2004) (1)
Investigation of acousto-optic interaction in dense flint glass and tellurium dioxide crystal (1995) (1)
The diffraction of leaky Rayleigh waves at the extremity of a fluid‐loaded plate (2004) (1)
Bragg imaging of high‐intensity ultrasonic waves (1987) (1)
Diffraction of light by superposed parallel supersonic waves, being harmonics of the same fundamental. Solution of the system of difference-differential equations for the amplitudes (1971) (1)
The Schoch effect as a means to detect the principal axes of a piezoelectric crystal (2004) (1)
Ultrasonic Bragg imaging of flaws (1987) (1)
Interaction of a bounded ultrasonic beam with a thin inclusion inside a plate. (2003) (1)
Stimulated material vibration by inhomogeneous plane waves and its application for bounded ultrasonic beams (1994) (1)
The acousto-optic technique to evaluate hardness profiles and the relation to the microstructure (1998) (1)
Acoustooptic Reflection Coefficient for Bounded Beams on Plates Using Inhomogeneous Wave Description (1991) (1)
The influence of a density stratification and of an incompressibility modulus on the spectrum of core modes (1996) (1)
Diffraction of light by superposed parallel supersonic waves, one being then-th harmonic of the other. Solution of the system of difference-differential equations for the amplitudes by a series expansion method (1971) (1)
On the use of bounded beam effects to characterize fluids in containers (2004) (1)
Two Improved Methods to Determine the Coefficients in the Inhomogeneous Wave Decomposition of Bounded Beams (2003) (1)
BOUNDED BEAM REFLECTION AND TRANSMISSION EFFECTS IN TERMS OF COMPLEX HARMONIC WAVES (1992) (1)
Relation between the phase of the reflected ultrasound and the thickness of a thin layer placed on a solid halfspace (1996) (1)
Numerical simulations of ultrasonic polar scans on single layered fiber reinforced composites (2003) (1)
Diffraction of light bv two parallel superposed supersonic waves, one being the second harmonic, the other the third harmonic of the same fundamental. Description of two methods leading to approximate solutions in finite form (1971) (0)
Diffusion of an ultrasonic wave by a simple rough surface Diffusion d ' une onde ultrasonore par une surface rugueuse simple (2005) (0)
The diffraction of Inhomogeneous waves by a doubly corrugated liquid/solid interface (2002) (0)
Schlieren photography study of energy absorption by uric acid nuclei. (2000) (0)
Inhomogeneous waves in isotropic and anisotropic media (2004) (0)
Fringed sound fields and their interaction with liquid-solid interfaces. (2006) (0)
On the possible application of doubly corrugated plates in advanced SAW devices (2003) (0)
Acousto-optics: a new NDT-technique to evaluate thin layered structures (1994) (0)
Ultrasonics: a Fascinating Field of Physics and its Applications (2003) (0)
Sound pulse imaging in the optical near field of a Bragg diffracted-light pulse (1998) (0)
A study of bounded beam reflection on plates and half‐spaces using least‐squares approximation (1981) (0)
Multiple Bragg Imaging of Finite Amplitude Ultrasonic Waves (1993) (0)
An acoustic mode method for the description of scattering and mode conversion processes (1994) (0)
Discussion and comparison of several analytical methods describing light diffraction by ultrasonic pulses (1994) (0)
A unified picture of plane wave reflectivity from a liquid‐solid interface and a solid plate in a liquid (1980) (0)
Fresnel phenomena in the near field of light diffracted by ultrasound (1992) (0)
Surface mode generation at porous interfaces by permanent and transient heterogeneous plane waves (2020) (0)
Relation between phase differences and small layer thicknesses (1994) (0)
The influence of coating thickness on the phase shift of bouned ultrasonic beams: an analytical model based on normal mode theory and acousto-optic interaction (2001) (0)
Thi nlaye rthicknes smeasurement sbase do nth eacousto-opti ctechnique (2001) (0)
An Investigation Of The Excitation Of Stoneley Waves At Liquid-Solid Interfaces (1994) (0)
Peculiarities of Stoneley Wave Generation on Division Boundaries between Different Structures (1993) (0)
Visualizing a sound pulse in the near field of a Bragg diffracted light pulse (1998) (0)
Inhomogeneous plane waves: Energy conservation and reflection coefficient (1988) (0)
The acousto-optic technique to evaluate layered structures (1995) (0)
DIRECT ACOUSTO-OPTICAL MAESUREMENT OF CONTINUOUS AND PULSED ULTRASOUND USING RAMAN-NATH DIFFRACTION OF CONVERGENT LIGHT (1991) (0)
The diffraction of inhomogeous waves by a doubly corrugated liquid/solid interface. (2002) (0)
Sound in biased piezoelectric materials of general anisotropy (2005) (0)
TWO GENERALISED THEORIES DESCRIBING LIGHT DIFFRACTION BY ULTRASONIC PULSES :A. GENERATING-FUNCTION METHODB. LAPLACE-TRANSFORM METHOD (1990) (0)
The direct superposition method to predict wood anomalies in acoustic diffraction spectra (2001) (0)
The reflection of ultrasound from stressed piezoelectric crystals (2004) (0)
Reflection coefficient for bounded ultrasonic beams (1984) (0)
Material research using the acousto-optic technique (1996) (0)
Bragg imaging of profiled ultrasound using focused laser beams (2001) (0)
The dependence of Lamb wave stimulation parameters on the impedance difference between upper and lower liquid (2004) (0)
Description of several analytical methods used in the past fifty years of acousto-optic research in Belgium (1992) (0)
The characterization of applied and residual stress in isotropic plates by means of multidirectional inspection (2003) (0)
Special acoustic effects caused by the staircase of the El Castillo pyramid at the Maya ruins of Chicken-Itza in Mexico (2006) (0)
EXPERIMENTAL VERIFICATION OF DIFFRACTION OF LIGHT BY PHASE SHIFTED ADJACENT ULTRASOUND BEAMS OF FREQUENCY RATIO 1:n, S>>1 (1983) (0)
The extended model to simulate the Quetzal echo at the Mayan pyramid of Kukulkan at Chichen Itza in Mexico (2004) (0)
BRAGG-PHENOMENA IN THE FRESNEL REGION OF LIGHT DIFFRACTED BY ULTRASOUND (1992) (0)
A full simulation of the Quetzal echo at the Mayan pyramid of Kukulkan at Chichen Itza in Mexico (2003) (0)
The existence of a band-gap for Rayleigh waves on coated solids (2004) (0)
Interaction of ultrasonic waves by periodically rough liquid‐solid interfaces (1982) (0)
Material research with the acousto-optic technique using the interpretation of only one laser beam (1996) (0)
The integrated acousto-optic sensor for quality control of layered structures (2000) (0)
THE STUDY OF TRANSVERSAL ULTRASONIC BEAMS NORMAL INCIDENT ON PERIODIC ROUGH INTERFACES (1987) (0)
On the use of the localized inhomogeneity approach to describe bounded beams (2004) (0)
Some properties of waves having complex frequency (2004) (0)
Schlieren photography as a great tool to study wave diffraction at the end of a plate (2005) (0)
Accurate localization of rectangular cracks using Gaussian acoustic beams (2001) (0)
Ultrasonic polar scans: importance and numerical simulation on generally anisotropic media (2005) (0)
Measurements of corrugations on solids by means of the reflection of electromagnetic waves (1978) (0)
Acousto‐optics as the background of a long‐lasting friendship with Mack Breazeale. (2010) (0)
Phase measurements of reflected ultrasonic bounded beams on layered media using light diffraction (1996) (0)
On the existence of a Brewster angle for solid side incidence on periodically rough surfaces (2004) (0)
Acousto-optic and surface-acoustic wave investigation of metallic coatings (1996) (0)
The acousto-optic interaction from a fundamental point of view to its application in non-destructive testing (2002) (0)
The Direct Superposition Method to predict Wood Anomalies in Acoustic Spectra obtained from Diffraction on Periodically Corrugated Surfaces (2001) (0)
The possible connection between the non-trivial law of Snell and backscattering on smooth surfaces (2004) (0)
Ultrasonic Reflection from Solid Halfspaces and from Solid Plates. (1983) (0)
Study by Schlieren photography of energy absorption by uric acid calculi (1996) (0)
The interaction of a bounded ultrasonic beam with a thin inclusion inside a solid plate (2002) (0)
Advances in Acousto-Optics (2001) (0)
17 - Diffusion of an ultrasonic wave by a simple Rough surface (1985) (0)
The ultrasonic radiation mode theory (2005) (0)
Multilayered Rayleigh waves in anisotropic periodically multilayered media: Comparison between theory and experiments using the acousto‐optic technique (1999) (0)
The diffraction of ultrasound on corrugated surfaces and its possible application for surface wave stimulation (2005) (0)
ANALYSIS OF THE NEARFIELD OF LASER LIGHT DIFFRACTED BY A PLANE ULTRASONIC WAVE (1991) (0)
Theoretical and Experimental Study of the Propagation and Divergence of Bounded Acoustic Beams (2001) (0)
Acousto-Optic Method Used in Layered Media (1984) (0)
Polarization effects in ultrasonic light diffraction of +/-1 orders in the intermediate range in isotropic SiO2 - Experimental results and numerical comparison (1996) (0)

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