Results 261 to 270 of about 35,825 (307)
Some of the next articles are maybe not open access.
Phase Detection in Acoustic Microscopy
Ultrasonic Imaging, 1990The scanning laser acoustic microscope provides a relatively simple means by which speed of sound data can be collected from biological specimens. By employing a phase detection circuit, phase-contour lines can be superimposed on acoustic micrographs and digitized for direct speed of sound calculations.
openaire +2 more sources
1992
Abstract The principle of the scanning acoustic microscope is becoming increasingly well known (Lemons and Quate, 1979; Briggs, 1985). For any wave motion, the wave-length is equal to the wave speed divided by the frequency. Thus by increasing the frequency sufficiently the wavelength can be made as small as you like.
G A D Briggs, M Hoppe
openaire +1 more source
Abstract The principle of the scanning acoustic microscope is becoming increasingly well known (Lemons and Quate, 1979; Briggs, 1985). For any wave motion, the wave-length is equal to the wave speed divided by the frequency. Thus by increasing the frequency sufficiently the wavelength can be made as small as you like.
G A D Briggs, M Hoppe
openaire +1 more source
The Journal of the Acoustical Society of America, 1972
The new field of acoustic microscopy, still in its very infancy, may yet succumb due to irrelevance. On the other hand, it may prove to be extremely useful provided the mechanical wavemotion of sound indeed reveals important microscopic structures, not made visible by either light or electrom microscopy.
openaire +1 more source
The new field of acoustic microscopy, still in its very infancy, may yet succumb due to irrelevance. On the other hand, it may prove to be extremely useful provided the mechanical wavemotion of sound indeed reveals important microscopic structures, not made visible by either light or electrom microscopy.
openaire +1 more source
Lens design for acoustic microscopy
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1988Design criteria for acoustic microscope lenses are examined with respect to their intended application. Aside from buffer rod material and F-number, the factors influencing the lens design are the critical angle for surface wave excitation, lens illumination, and leak rate of the surface wave on the sample.
C H, Chou, B T, Khuri-Yakub, G S, Kino
openaire +2 more sources
Acoustic transducer for acoustic microscopy
The Journal of the Acoustical Society of America, 1991A shear acoustic transducer-lens system in which a shear polarized piezoelectric material excites shear polarized waves at one end of a buffer rod having a lens at the other end which excites longitudinal waves in a coupling medium by mode conversion at selected locations on the lens.
Butrus T. Khuri-Yakub, Ching H. Chou
openaire +1 more source
Scanning tomographic acoustic microscopy
IEEE Transactions on Image Processing, 1995The scanning tomographic acoustic microscope (STAM) was proposed in 1982 as a method of improving the resolution capability of the scanning laser acoustic microscope (SLAM) based on the principles of tomography. By modifying the SLAM with a quadrature detector, tomographic projections that contain both the amplitude and phase information of the ...
Richard Y. Chiao, Hua Lee
openaire +2 more sources
Acoustic microscopy of mammalian kidney
Journal of Clinical Ultrasound, 1974AbstractAcoustic micrographs of unstained specimens of mouse kidney were produced at frequencies of 100 MHz and 220 MHz with resolutions of 20μ m and 9μm, respectively. The acoustically revealed structure has been examined in relation to established microanatomy. High contrast details corresponding to connective tissue boundaries of supporting elements
L W, Kessler, S I, Fields, F, Dunn
openaire +2 more sources
Acoustic microscopy applied to physical acoustics
Review of Scientific Instruments, 1986An acoustic microscope setup has been applied to determine Rayleigh wave velocities in crystals from acoustic materials signatures. The Rayleigh wave velocity close to and above the phase transition in SrTiO3 has been measured as a function of temperature. It has been shown that propane can be used as a coupling liquid between the acoustic lens and the
J. O. Fossum, J. D. N. Cheeke
openaire +1 more source
Proceedings of the IEEE, 1979
Acoustic microscopy is emerging as an important analytical technique serving the needs of both biomedical and materials technology. Based upon imaging of specimens with elastic waves at VHF and UHF frequencies, acoustic microscopes reveal structural-mechanical properties with high magnification.
L.W. Kessler, D.E. Yuhas
openaire +1 more source
Acoustic microscopy is emerging as an important analytical technique serving the needs of both biomedical and materials technology. Based upon imaging of specimens with elastic waves at VHF and UHF frequencies, acoustic microscopes reveal structural-mechanical properties with high magnification.
L.W. Kessler, D.E. Yuhas
openaire +1 more source