1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Three component time reversal: Focusing vector components using a scalar source
Rent:
Rent this article for
USD
10.1063/1.3259371
/content/aip/journal/jap/106/11/10.1063/1.3259371
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/11/10.1063/1.3259371
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Pictoral representation showing a sample with a source transducer capable of emitting a signal unidirectional in the direction in the frame at ; and a laser vibrometer receiver measuring the components in the frame at .

Image of FIG. 2.
FIG. 2.

Experimental setup. The DLV used to obtain the in-plane components is mounted on a rotational stage in order to measure the and components individually. The DLV and normal LV are focused coincidently and synced to obtain in-plane and out-of-plane components simultaneously. For the experiments reported here , the unit vectors for which are shown.

Image of FIG. 3.
FIG. 3.

Numerical simulations of the selective focusing after reciprocal TR of individual particle velocity components and of various combinations. The simulations are performed for a cube of fused silica, and for with excitation in the plane, reception in the plane. Left column specifies the scalar input information supplied to the source for rebroadcasting at position . Right column displays the subsequent recording of the three particle velocity components at location .

Image of FIG. 4.
FIG. 4.

Experimentally obtained signals during the reciprocal TR focusing process. (a) & (b) Respectively, the normal and in-plane component signals recorded during the broadcast of ; note the high amplitude focusing that occurs in the component and is absent in the (also absent in , not shown). (c) & (d) The and component signals recorded during the broadcast of ; note the focusing now seen in the component, not in the or (not shown). (e) & (f) The and component signals recorded during the broadcast of ; note the focusing now seen in both components. The reduced amplitude of each focus is due to the conservation of energy in that one transducer is only capable of emitting a finite amount of energy into the system.

Image of FIG. 5.
FIG. 5.

Three component focusing with . Model (top row) and experimental (bottom row) results. Magnitude of the three velocity components of motion , and . The color scales are normalized to the maximum amplitude in each respective component. Note the near identical focal structure for each component.

Image of FIG. 6.
FIG. 6.

Single component focusing with . Model (top row) and experimental (bottom row) results. Three velocity components of motion , and . The color scales are normalized to the maximum amplitude in each respective component to illustrate the full structure of the vector wave field. Note the in-plane dipole motion seen in the and components around the focal location due to the Poisson effect.

Image of FIG. 7.
FIG. 7.

Single component focusing with . Model [(a) & (c)] and experimental [(b) & (d)] results. (a) & (b) Out of plane and (c) & (d) in-plane magnitudes, i.e., and , respectively. Each column uses the same color scale to accurately depict the relative amplitudes of the in-plane and out of plane components at the time of focus. The Poisson effect is manifest in the in-plane components around the focal location, however, these amplitudes, while higher than the background, are still small with respect to the focal amplitude along (out of plane).

Loading

Article metrics loading...

/content/aip/journal/jap/106/11/10.1063/1.3259371
2009-12-02
2014-04-19
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Three component time reversal: Focusing vector components using a scalar source
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/11/10.1063/1.3259371
10.1063/1.3259371
SEARCH_EXPAND_ITEM