Scanning near field ultrasound holography

Details Scanning near field ultrasound holography Scanning near field ultrasound holography

2005-10-06

2008-11-11

Williams, Hezron E. (Department: 2856)

Measuring and testing

Vibration

By mechanical waves

C073S596000, C181S101000

Reexamination Certificate

active

07448269

ABSTRACT:
A high spatial resolution phase-sensitive technique employs a scanning near field ultrasound holography (SNFUH) methodology for imaging elastic as well as viscoelastic variations across a sample surface. SNFUH uses a near-field approach to measure time-resolved variations in ultrasonic oscillations at a sample surface. As such, it overcomes the spatial resolution limitations of conventional phase-resolved acoustic microscopy (i.e. holography) by eliminating the need for far-field acoustic lenses.

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