Results 11 to 20 of about 15,077 (301)
Penetration Depth of the Scanning Acoustic Microscope [PDF]
IEEE Transactions on Sonics and Ultrasonics, 1985 A definition for the penetration depth of the scanning re- flection acoustic microscope is given. With this definition it is possible to calculate the penetration depth of a given lens geometry for a given material. The penetration depth depends on the elastic parameters of the object, the signal-to-noise ratio, and the operation frequency of the ...
Atalar, Abdullah
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Increasing the Sensitivity of the Scanning Acoustic Microscope to Anisotropy [PDF]
IEEE 1987 Ultrasonics Symposium, 1987 The response of the scanning acoustic microscope to anisotropic materials is theoretically investigated. For this purpose, the reflection coefficient of plane acoustic waves incident on a liquid-anisotropic-solid interface is numerically calculated. The reflection coefficient depends, in general, on polar and azimuthal angles of incidence.
A. Atalar, Atalar, Abdullah
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Improvement of anisotropy sensitivity in the scanning acoustic microscope [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1989 The response of the conventional scanning acoustic microscope (SAM) to anisotropic materials is theoretically investigated. For this purpose, the reflection coefficient of plane acoustic waves incident on a liquid-solid interface is numerically calculated for a general anisotropic solid oriented in any arbitrary direction.
Atalar, Abdullah
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Scanning Acoustic Force Microscope Investigations of Surface Acoustic Waves
Surface and Interface Analysis, 1997 We report on the investigation of surface acoustic wave (SAW) fields by scanning acoustic force microscopy (SAFM), reaching submicron lateral resolution. The SAFM is based on a standard atomic force microscope and utilizes the non-linear force curve in the sense of a mechanical diode. The surface oscillation therefore leads to a shift of the cantilever'
Hesjedal, T, Chilla, E, Frohlich, H
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Probing of oscillating surfaces by a scanning acoustic tunneling microscope
Thin Solid Films, 1995 Abstract The scanning acoustic tunneling microscope (SATM) which is based on a scanning tunneling microscope, is capable of detecting the amplitude and the phase of high-frequency surface acoustic waves (SAWs) as well as the surface topography. For our experiments the SAWs have been excited by interdigital transducers on YZ-LiNbO3 samples.
Hesjedal, T, Chilla, E, Frohlich, H
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All-optical scanning acoustic microscope [PDF]
, 2003 In this thesis a new instrument, the all-optical scanning acoustic microscope (O-SAM) is presented, it is a non contact scanning acoustic microscope (SAM) which uses lasers to both generate and detect surface acoustics waves (SAWs) The non contact nature of the O-SAM overcomes some difficulties associated with conventional SAMs because of the couplant ...
Sharples, Steve David
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Scientific Reports, 2022 Graphene, an extraordinary tow-dimensional carbon nanostructure, has attracted global attention due to its electronic, mechanical, and chemical properties; therefore, there is a need to find out an economical mass production method to produce graphene ...
Sayed Waliulhaq Mushfiq, Reza Afzalzadeh
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Non-destructive observations of small crack using scanning laser-induced acoustic microscope
Mechanical Engineering Journal, 2016 The scanning laser-induced acoustic microscope (SLAM) has been developed as a tool for non-destructive observations of the defects in materials. It consists of the laser with modulation system, the function generator, the lock-in amplifier, the AE sensor
Atsuhiro KOYAMA +5 more
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Science and Engineering of Composite Materials, 2021 In this study, a kind of structural gradient metal hollow spheres composites (SG-MHSCs) were fabricated using two kinds of 316L stainless steel hollow spheres with different diameters and A356 aluminum through the casting method.
Wang Chunhe +2 more
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Sensors, 2023 Ultrasound imaging is a highly valuable tool in imaging human tissues due to its non-invasive and easily accessible nature. Despite advances in the field of ultrasound research, conventional transducers with frequencies lower than 20 MHz face limitations
Hayong Jung, K. Kirk Shung, Hae Gyun Lim
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