Ultrasonic electronic lens with reduced delay range

Details Ultrasonic electronic lens with reduced delay range Ultrasonic electronic lens with reduced delay range

1976-07-21

1977-11-15

Queisser, Richard C.

Measuring and testing

Vibration

By mechanical waves

128 2V, 73629, 73620, 73617, G01N 924

Patent

active

040580032

ABSTRACT:
Ultrasonic reflections are received by a transducer array whose resultant signals are passed through an array of time-varying delay lines to provide focusing at all depths. The delay lines are made up of a combination of two components, one increasing and one decreasing with the distance to the axis of the array. This combination minimizes the range of delay variations required over the depth range. When using charge coupled devices as delay elements, this combination minimizes the required range of clock frequencies.

REFERENCES:
patent: 3090030 (1963-05-01), Schuck
patent: 3739324 (1973-06-01), Coltman
patent: 3918024 (1975-11-01), Macovski
patent: 3919683 (1975-11-01), Itamura et al.
patent: 3936791 (1976-02-01), Kossoff
patent: 3964014 (1976-06-01), Telton

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