Measurement of the mechanical amplitude and phase of transient surface acoustic waves using double-pulsed TV holography and the spatial Fourier transform method

Cristina Trillo; Angel F. Doval; Daniel Cernadas; Oscar Lopez; Carlos Lopez; Benito Vasquez Dorrio; Jose L. Fernandez; Mariano Perez-Amor

doi:10.1117/12.516578

27 May 2003 Measurement of the mechanical amplitude and phase of transient surface acoustic waves using double-pulsed TV holography and the spatial Fourier transform method

Cristina Trillo, Angel F. Doval, Daniel Cernadas, Oscar Lopez, Carlos Lopez, Benito Vasquez Dorrio, Jose L. Fernandez, Mariano Perez-Amor

Author Affiliations +

Proceedings Volume 4933, Speckle Metrology 2003; (2003) https://doi.org/10.1117/12.516578
Event: Speckle Metrology 2003, 2003, Trondheim, Norway

Abstract

We present a technique to calculate the mechanical amplitude and phase of an ultrasonic plane wavefield of nanometric amplitude that propagates on a surface. Our aim is to detect perturbations of the initially smooth wavefronts that indicate the presence of flaws in the material. We use bursts of Rayleigh waves and a double-pulsed TV Holography system that records two correlograms separated down to 1.5 microseconds. The phases of the correlograms are calculated separately using the spatial Fourier transform method (SFTM), and subtracted. In the resultant phase map, the field of instantaneous displacements of the surface (that comprises several periods of the surface acoustic wave) acts as a modulated spatial carrier, now related to the mechanical phase and amplitude, that are extracted applying the SFTM again.

Citation Download Citation

Cristina Trillo, Angel F. Doval, Daniel Cernadas, Oscar Lopez, Carlos Lopez, Benito Vasquez Dorrio, Jose L. Fernandez, and Mariano Perez-Amor "Measurement of the mechanical amplitude and phase of transient surface acoustic waves using double-pulsed TV holography and the spatial Fourier transform method", Proc. SPIE 4933, Speckle Metrology 2003, (27 May 2003); https://doi.org/10.1117/12.516578

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Fourier transforms

Acoustics

Wave propagation

Holography

Cameras

Beam splitters

Modulation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years