Method of making a focussing element for use in a lenseless focu

Details Method of making a focussing element for use in a lenseless focu Method of making a focussing element for use in a lenseless focu

1988-04-08

1990-05-08

Echols, P. W.

Metal working

Piezoelectric device making

181175, 181176, H04R 1700

Patent

active

049225944

ABSTRACT:
A focussing element for use in a lenseless, focussed transducer for producing a semi-focussed, ultrasonic beam comprises a body formed of electrical insulating material and a plurality of piezoelectric elements disposed in one end of the body, each element being planar, extending outwardly from a common axis, and being disposed at a predetermined angel to the common axis whereby to define a common focal point on the axis, and electrical conductors secured to the piezoelectric element for electrically exciting the elements.

REFERENCES:
patent: 2405604 (1946-08-01), Pope
patent: 4009516 (1977-03-01), Chiang et al.
patent: 4530139 (1985-07-01), Miller

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