Acoustic microscope using line-focus acoustic beam
First Claim
1. An acoustic microscope for detecting acoustic properties of a specimen comprising:
- an acoustic transducer head for propagating an acoustic beam toward a specimen and which is linearly focussed in a direction perpendicular to the direction of propagation of the acoustic beam;
means for moving the acoustic transducer head relative to a specimen in the direction of propagation of the acoustic beam; and
means for rotating the acoustic transducer head relative to a specimen about an axis which is parallel with the direction of propagation of the acoustic beam.
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Abstract
An acoustic microscope using a line-focus acoustic beam is disclosed. The line-focus acoustic beam is generated by an acoustic transducer head having an acoustic transducer electrode applied on a flat end surface of a sapphire rod, in the opposite end surface is formed a cylindrical concave surface. The acoustic transducer head is arranged fixedly above a mechanical stage on which a specimen is placed. The mechanical stage is movable in a Z axis, i.e. an axis of the line-focus acoustic beam and is also rotatable about the Z axis. By moving the stage in the Z-axis, a V(z) curve is obtained and a phase velocity of a leaky surface-acoustic wave is calculated from a repetition period of the V(z) curve. Then the V(z) curve measurement is repeated while the stage is rotated, and it is possible to obtain anisotropies of the specimen expressed by a relation between the rotational angle and the phase velocity of the leaky surface-acoustic wave.
22 Citations
14 Claims
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1. An acoustic microscope for detecting acoustic properties of a specimen comprising:
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an acoustic transducer head for propagating an acoustic beam toward a specimen and which is linearly focussed in a direction perpendicular to the direction of propagation of the acoustic beam; means for moving the acoustic transducer head relative to a specimen in the direction of propagation of the acoustic beam; and means for rotating the acoustic transducer head relative to a specimen about an axis which is parallel with the direction of propagation of the acoustic beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An acoustic microscope for detecting acoustic properties of a specimen comprising:
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an acoustic transducer head for propagating an acoustic beam toward a specimen and which is linearly focussed in a direction perpendicular to the direction of propagation; said acoustic transducer head comprising a solid state acoustic field medium having a flat end surface and an opposite surface, a plurality of electroacoustic transducer elements arranged on said flat end surface in such a manner as to form angles relative to one another which do not equal zero, and a plurality of cylindrical concave surfaces equal in number to the number of said plurality of transducer elements and formed in said opposite surface in such a manner that each transducer element is aligned with a respective one of said concave surfaces.
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Specification