Apparatus for generating acoustic wave having a liquid lens with

Details Apparatus for generating acoustic wave having a liquid lens with Apparatus for generating acoustic wave having a liquid lens with

1992-10-13

1994-04-26

Cohen, Lee S.

Surgery: kinesitherapy

Kinesitherapy

Contact-free comminution of concretion

12866301, 12866003, 367150, 367151, 601 2, A61B 1722

Patent

active

053057317

ABSTRACT:
A generator for acoustic waves has a source of acoustic waves with which acoustic waves can be introduced into an acoustic propagation medium and a liquid lens having a variable focal length which is arranged in the acoustic propagation medium, the liquid lens having two lens walls and a lens liquid situated therebetween. At least one of the lens walls is deformable for the purpose of varying the focal length. The liquid lens has a central opening, so that the lens walls have an outer and an inner edge, and the outer edge of the deformable lens wall is fixed and the inner edge is displaceable in the direction of the center axis of the liquid lens for the purpose of varying the focal length.

REFERENCES:
patent: 4697588 (1987-10-01), Reichenberger
patent: 4718421 (1988-01-01), Rohwedder et al.
patent: 4838248 (1989-06-01), Grasser
patent: 4844079 (1989-07-01), Naser et al.
patent: 4928672 (1990-05-01), Grasser et al.
patent: 4977888 (1990-12-01), Rietter et al.
patent: 5009232 (1991-04-01), Hassler et al.

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