Ultrasonic beam forming technique

Measuring and testing – Moisture content or absorption characteristic of material

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G01N 2900

Patent

active

040167518

ABSTRACT:
Apparatus for ultrasonic examination of objects, particularly in medical gnostic examination, incorporates means for focusing portions of the beam of ultrasonic pulses generated by a transducer at a plurality of distances from the transducer to reduce the width of the beam over a large distance.

REFERENCES:
patent: 2779880 (1957-01-01), Malherbe
patent: 3166731 (1965-01-01), Joy
patent: 3251219 (1966-05-01), Hertz et al.
patent: 3859984 (1975-01-01), Langley

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