Ultrasonic echographic probe having an acoustic lens and an echo

Details Ultrasonic echographic probe having an acoustic lens and an echo Ultrasonic echographic probe having an acoustic lens and an echo

1981-03-06

1982-07-20

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

73642, 310335, 367103, 367150, G01S 1589

Patent

active

043409440

ABSTRACT:
A probe primarily applicable to medical echography for achieving a variable compromise between depth of field and lateral resolution incorporates a main piezoelectric transducer, a plano-convex lens having an elastic diaphragm, an auxiliary transducer for measuring the deflection of the lens and means for controlling the deflection in dependence on a reference value by modifying the pressure exerted on the diaphragm by the fluid contained within the lens.

REFERENCES:
patent: 2743429 (1956-04-01), Erdman et al.
patent: 3168659 (1965-02-01), Bayre et al.
patent: 3239801 (1966-03-01), McGaughey
patent: 3776361 (1973-12-01), Rolle
patent: 4084582 (1978-04-01), Nigam
patent: 4199246 (1980-04-01), Muggli

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