Simplified sector scan ultrasonic imaging system

Details Simplified sector scan ultrasonic imaging system Simplified sector scan ultrasonic imaging system

1978-03-09

1979-12-25

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

73626, 367 7, G01S 966, G01S 968, G01N 2900

Patent

active

041807910

ABSTRACT:
A curved transducer array or a flat array with an acoustic converging lens functions as a fixed focus physical lens and is focused near maximum range. At longer ranges the full aperture is utilized for good resolution, and at shorter ranges up to a specified fraction of maximum range improved resolution is achieved by a dynamic aperture control which increases the array aperture by steps by switching in more transducer elements. This simplified sector scanner does not require dynamic electronic focusing.

REFERENCES:
patent: 2549872 (1951-04-01), Willard
patent: 4012952 (1977-03-01), Dory
patent: 4058003 (1977-11-01), Macovski

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