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Sonic gradient index lens for aqueous applications
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10.1063/1.3489373
/content/aip/journal/apl/97/11/10.1063/1.3489373
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/11/10.1063/1.3489373
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Plan schematic of the gradient index lens. (b) Cylinder radius plotted vs position along the -axis. (c) Digital photograph of the GIL in the isolation tank.

Image of FIG. 2.
FIG. 2.

(a) Normalized pressure amplitude plotted vs and , measured 2.144 ms after the initial pulse leaves the source. (b) Measured, normalized pressure intensity plotted vs and after averaging over a 10-cycle pulse. (c) Normalized pressure intensity calculated using MST. The focusing peak maximum is marked by a .

Image of FIG. 3.
FIG. 3.

(a) Measured, normalized pressure intensity vs for source positions , 185.8, 175.7, 165.5, 155.4, 145.2, 135, 124.9, and 114.7 cm. (b) Normalized pressure intensity calculated using MST for source positions , , , , , , and . Inset: expanded region of the vertical axis showing the focusing peak positions. (c) Two focusing peaks from panel (a) are replotted as circles (upper region offset for clarity). Black lines indicate a double-Gaussian fit, with blue (peak 1) and red (peak 2) lines showing the component Gaussians individually. (d) Inverse peak positions plotted vs inverse source positions . Blue and red lines are fits to the trends of peaks 1 and 2, respectively. The dashed line plots the peak positions of the simulated data in panel (b).

Image of FIG. 4.
FIG. 4.

(a) Measured, normalized pressure intensity plotted vs and with the source at a 14.7° angle with respect to the -axis. (b) Normalized pressure intensity calculated using MST with the source at a 15° angle. White lines indicate the off-axis angle; positions of the expected focusing peaks are marked with a .

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/content/aip/journal/apl/97/11/10.1063/1.3489373
2010-09-14
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Sonic gradient index lens for aqueous applications
http://aip.metastore.ingenta.com/content/aip/journal/apl/97/11/10.1063/1.3489373
10.1063/1.3489373
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