Ultrasonic probe

Details Ultrasonic probe Ultrasonic probe

1989-12-07

1990-10-02

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

310334, 310369, 128 24A, 12866001, 12866009, H04R 1700

Patent

active

049611763

ABSTRACT:
An ultrasonic probe includes a first group of one or more piezoelectric elements extending concentrically, and a second group of one or more piezoelectric elements extending concentrically and extending outward of the elements in the first group. The elements in the first and second groups form a front surface via which ultrasonic wave is transmitted and received. The elements in the first and second groups are separated by predetermined gaps. Areas of the respective elements in the second group over the front surface are substantially equal to each other within an accuracy corresponding to areas of the gaps over the front surfaces. Areas of the respective elements in the first group over the front surface are substantially equal to half the areas of the respective elements in the second group within an accuracy corresponding to the areas of the gaps.

REFERENCES:
patent: 3457543 (1969-07-01), Akervold et al.
patent: 4395652 (1983-07-01), Nakanishi et al.
patent: 4523471 (1985-06-01), Lee
"Analysis of the Directional Pattern of Dynamic Focusing Transducers" by M. Ueda et al; The Journal of the Acoustical Society of Japan vol. 32, no. 6, Jun. 1976.

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