Design for an Aspherical Acoustic Fresnel Lens with Phase Continuity
スポンサーリンク
概要
- 論文の詳細を見る
A convex acoustic lens using room temperature vulcanizing (RTV) silicone rubber, whose acoustic impedance is similar to that of water, is a typical acoustic lens. A phase-continuous Fresnel lens was proposed to thin the shape of the lens because a convex acoustic lens has large attenuation due to its thickness. However, a Fresnel lens based on a convex spherical acoustic lens could not concentrate sound pressure completely on the focal point because of a spherical aberration. We designed an aspherical Fresnel lens by ray theory to remove the spherical aberration. A two dimensional finite difference time domain (2-D FDTD) method was used to survey the sound pressure field focused by the acoustic lens under condition in which the angle of incidence and the aperture were varied. Results showed that the aspherical Fresnel lens can concentrate greater sound pressure than the spherical Fresnel lens at normal and small angles of incidence.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2008-05-25
著者
-
Mizutani Koichi
Graduate School Of Systems And Information Engineering Univ. Of Tsukuba
-
Nakamura Toshiaki
Department Of Anesthesia Nagasaki Rosai Hospital
-
Sato Yuji
Graduate School Of Medicine And Pharmaceutical Sciences University Of Toyama
-
Wakatsuki Naoto
Graduate School Of Systems And Information Engineering University Of Tsukuba
-
Mizutani Koichi
Graduate School of System and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
関連論文
- Comparism of Hemodynamic and Catecholamine Responses between Propofol and Thiamylal Used in a Rapid Sequence Induction
- A case of contact dermatitis due to Curcuma longa (turmeric)
- The Feeding of β-Carotene Down-Regulates Serum IgE Levels and Inhibits the Type I Allergic Response in Mice(Highlighted paper selected By Editor-in-chief)(Analytical Biochemistry)
- Acoustic Beam Scanning Using Annular Transducer Array Introducing Decentering Operation(Advanced Technology of Vibration and Sound)
- Constituents of Laurus nobilis L. inhibit recombinant human lanosterol synthase
- Inhibition of Human Lanosterol Synthase by the Constituents of Colocasia esculenta (Taro)(Pharmacognosy)
- Epohelmins A and B, Novel Lanosterol Synthase Inhibitors from a Fungal Strain FKI-0929
- Lanopylins A_1, B_1, A_2 and B_2, Novel Lanosterol Synthase Inhibitors from Streptomyces sp. K99-5041
- 205 SCANNING OF ACOUSTIC BEAM USING DECENTERING OPERATION FOR ANNULAR TRANSDUCER ARRAY(O.S.4 Measurement and Sensor I)
- Effect of decentering ratio of elements in a variable radiation direction sound source on beam profile
- Cellular Basis of Induction of Contact Hypersensitivity and Tolerance
- Estimation of Correlation of Acoustic Reciprocal Transmissions Using Central Equatorial Pacific Tomography Data
- Estimation of the Stability of Acoustic Reciprocal Transmission in Long-Range Propagation at the Central Equatorial Pacific
- P3-45 Reconstruction of Vibrating Surface of Ultrasonic Transducer Using O-CT and Acoustical Holography(Poster session 3)
- P3-4 Measuring Sound Fields in Air by Michelson Interferometer(Poster session 3)
- Hemodynamic and catecholamine responses during rapid sequence induction with propofol in hypertensive patients
- Isoliquiritigenin, One of the Antispasmodic Principles of Glycyrrhiza Ularensis Roots, Acts in the Lower Part of Intestine(Pharmacognosy)
- Pharmaceutical Evaluation of Cultivated Glycyrrhiza uralensis Roots in Comparison of Their Antispasmodic Activity and Glycycoumarin Contents with Those of Licorice(Pharmacognosy)
- Does Drug-induced Hypersensitivity Syndrome Elicit Bullous Pemphigoid?
- P2-4 Propagation Characteristics of Negative Group Velocity of Lamb-type Waves in a Glass-Water-Glass Layer(Poster session 2)
- Effects of Recombinant Human Growth/Differentiation Factor-5 Using in vitro and in vivo Experiments
- Urticarial Reaction Caused by Ethanol
- Numerical Analysis of Piezoelectric Sensor Using Multimode Vibration for Liquid Density and Viscosity Measurement
- Monolithic Piezoelectric Sensor for Measurement of Triaxial Forces Applied to Bridge by String Vibration
- Design and Convergence Performance Analysis of Aspherical Acoustic Lens Applied to Ambient Noise Imaging in Actual Ocean Experiment
- Design for Underwater Aplanatic Straubel Acoustic Mirror
- Experimental Study on Measurement of Acoustic Cavitation Bubbles in Spatial Frequency Domain Using Optical Spectrometer
- A Method for Estimating the Location of the Drill-Bit During Horizontal Directional Drilling Using a Giant-Magnetostrictive Vibrator
- Design for Underwater Aplanatic Acoustic Mirror
- Flow Velocity Measurement Using an Orthogonally Radiated Ultrasonic Beam
- A Modified Fluorescence Polarization Immunoassay Method Incorporating Fat Emulsion (FE-FPIA) to Determine Cyclosporin A Concentrations in Rat Skin
- Optical visualization of coupling modes of leaky Lamb waves with negative group velocity in the solid/fluid/solid trilayer
- P2-15 Correlation Characteristic Improvement of Sound Probe Using Inverse Problem(Short oral presentation for posters)
- P2-13 Temperature Measurement Using Network Controlled Acoustic Sensors(Short oral presentation for posters)
- Precise Wireless Triggering System for Anemometers with Long-Baseline Acoustic Probes
- Underground Imaging Method Using Magnified Cross-Correlation Analysis
- Detection of Underground Concrete Block Using Giant-Magnetostriction Vibrator Applying Magnified Cross-Correlation Analysis
- Ultrasonic Fog Detector for Greenhouse with Evaporative Fog Cooling System
- Artifact Reduction in Tomographic Images for Nondestructive Testing of Square Billets Using Ultrasonic Computerized Tomography
- P2-11 Simple Ultrasonic Anemometer Using a Bended Sound Probe(Short oral presentation for posters)
- Locality of Area Coverage on Digital Acoustic Communication in Air using Differential Phase Shift Keying
- Measurement of Vertical Temperature Distribution Using a Single Pair of Loudspeaker and Microphone with Acoustic Reflection
- Numerical Simulation of Target Range Estimation Using Ambient Noise Imaging with Acoustic Lens
- Evaluating Directional Resolution of Aplanatic Acoustic Lens for Designing Ambient Noise Imaging System
- Fluctuation of Long-Distance Sound Propagation in the Central Pacific
- Investigation of Thermal Conductivity and Heat Characteristics of Oil Sands Using Ultrasound Irradiation for Shortening the Preheating Time (Special Issue : Ultrasonic Electronics)
- Estimation of the Travel Time Using the New Measurement Technique for Long-range Transmission
- Ultrasonic Measurement System for Detecting Penetration of Boulders by Autocorrelation Analysis
- Simulation of Internal Crack Detection in Shape-Distorted Cast Billets Using Time-of-Flight Measurements of Longitudinal Ultrasonic Waves
- Estimation of Sound Velocity Distribution Using Sectional Near-Field Acoustical Holography and Global Search
- Small-Scale Trial for Evaluating Directional Resolution of Single Spherical Biconcave Acoustic Lens in Designing of Ambient Noise Imaging System
- Finite Difference Time Domain Analysis of Underwater Acoustic Lens System for Ambient Noise Imaging
- Temperature Distribution Estimated by Optimization and Near-Field Acoustical Holography
- Precise Measurement of Travel Time Difference for Acoustic Reciprocal Transmission
- Extraction of Target Scatterings from Received Transients on Target Detection Trial of Ambient Noise Imaging with Acoustic Lens
- Effect of acrylic cover on convergence property of aplanatic and hyperbolic Fresnel lenses
- Numerical Analysis of Sound Pressure Fields Focused by Phase Continuous Fresnel Lens Using Finite Difference Time Domain Method
- Artifact Reduction in Tomographic Images for Nondestructive Testing of Square Billets Using Ultrasonic Computerized Tomography
- Design and Numerical Evaluation of Off-Axis Aplanatic Straubel Mirror for Underwater Acoustic Imaging
- Temperature Measurement Using Acoustic Reflectors
- Basic Study of Orthogonal Signal Division Multiplexing for Underwater Acoustic Communication: A Comparative Study
- Micrometeorology Measurement by Acoustic Method
- Analysis of Tidal Effect on Reciprocal Sound Propagation in Central Pacific Ocean
- Differential Phase Shift Keying Acoustic Communication in Air for Low-Signal-to-Noise Ratio Environment
- Temperature Distribution Measurement with Acoustic Computerized Tomography Using Rectangular Arrangement of Transducers
- Defect Detection in Square Billet Using Time-of-Flight of Longitudinal Waves
- Reconstruction of Three-Dimensional Sound Field from Two-Dimensional Sound Field Using Optical Computerized Tomography and Near-Field Acoustical Holography
- Analysis of Current Estimation along Sound-Channel Axis in Central Pacific
- Directional Trimming of Radiated Ultrasonic Beam Using Decentered Annular Transducer Array
- Indirect Measurement of Vibrating Surface of Ultrasonic Transducer Using Optical Computerized Tomography and Acoustical Holography
- Direction-Variable Beam by Decentered Annular Array Sound Source with Rounded Width of Elements
- Effect of Decentering Ratio Fluctuation of Annular Array Element in Direction-Variable Type Sound Sources
- Optimal Transducer Arrangement for Temperature Distribution Measurement in Arbitrary Convex-Shaped Space by Acoustic Computerized Tomography
- Temperature Distribution Measurement Using Reflection with Acoustic Computerized Tomography
- Measurement of Sound Fields Using Mach–Zehnder Interferometer
- Visualization of Mode Conversion of Lamb-Type Waves in Glass Plates Using Pulsed Light Source
- Chip-Interleaved Multiple Access for Underwater Acoustic Communication and Its Performance Evaluation in Propagation Simulation
- Sound Pressure Fields Focused Using Biconcave Acoustic Lens for Normal Incidence
- Measurements of Wind Velocity and Direction Using Acoustic Reflection against Wall
- Consideration of Radiation Impedance Calculation Methods for Cylindrical Array Sound Source
- Phase Shift Keying Acoustic Communication in Air with Impulse Response
- 3-D FDTD Analysis of Sound Field Focused by Biconcave Acoustic Lens for Normal Incidence
- Detection of Internal Cracks in Square Billets Using Time of Flight of Longitudinal Waves
- Design for Aplanatic Fresnel Acoustic Lens for Underwater Imaging
- Error Analysis for Micrometeorological Measurements Using Bidirectional Sound Probe with Long Baseline in Wind Fields
- Noncontact Measurement of Humidity and Temperature Using Airborne Ultrasound
- Two-Axis Anemometer with Acoustic Reflector Using Single Pair of Loudspeaker and Microphone
- Relationship between Spatial Distribution of Noise Sources and Target Scatterings Observed in the 2010 Sea Trial of Ambient Noise Imaging
- Design of an Absolutely Aplanatic Acoustic Lens
- Temperature Dependence of Parametric Phenomenon in Airborne Ultrasound for Temperature Measurement
- Design for an Aspherical Acoustic Fresnel Lens with Phase Continuity
- Variation in Cutoff Effect and Sound Field Caused by Geometrical Structures near the Coast
- Relationships between Existence of Negative Group Velocity and Physical Parameters of Materials for Lamb-Type Waves in Solid/Liquid/Solid Structure
- Negative Group Velocities of Lamb-Type Waves in a Glass/Water/Glass Structure Controlled by the Thickness of Water Layer
- Air Temperature Distribution Measurement Using Asynchronous-Type Sound Probe
- Association between Phase Modulation and Waveform on Phase Information Transmission by Phase Conjugate Wave
- A Simple Technique for Realizing an Ultrasonic Anemometer Using a Loudspeaker
- Optical Computerized Tomography for Visualization of Ultrasonic Fields Using Michelson Interferometer
- Fundamental Study on Inspection of Steel Pipe Covered with Insulator in Oil Complex
- Acoustic Communication in Air Using Differential Biphase Shift Keying with Influence of Impulse Response and Background Noise