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Ultrasound-modulated optical parallel speckle measurement with stroboscopic illumination in a coaxial reflection system
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10.1063/1.2165291
/content/aip/journal/apl/88/3/10.1063/1.2165291
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/3/10.1063/1.2165291
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Figures

Image of FIG. 1.
FIG. 1.

Stroboscopic illumination for ultrasound-modulated optical measurements. The location of the pulse is given as , where is the velocity of a propagating ultrasound pulse. A laser beam irradiates the optical sample for a short time to capture an instantaneous speckle pattern. A variety of speckle patterns are obtained as a function of the ultrasound pulse location . (a) A speckle pattern at the position of the ultrasound pulse . (b) A speckle pattern at the position of the pulse .

Image of FIG. 2.
FIG. 2.

Experimental setup. PL: Pulsed-laser diode; M: Mirror with a hole; PUT: Pulsed-ultrasound generator; CCD: Charge-coupled device camera; FG: Flame grabber; COM: Computer; DG: Delay generator; PG: Pulse generator; AMP: Amplifier; and SMP: A sample.

Image of FIG. 3.
FIG. 3.

Observation of an absorptive object at depth embedded in a scattering medium of thickness. The size of the absorber is and in thickness. (a) A one-dimensional axial distribution of along the axis. (b) A one-dimensional cross-sectional distribution of along the axis.

Image of FIG. 4.
FIG. 4.

Dependence of as a function of . A series of for of the absorber embedded in a scatterer with .

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/content/aip/journal/apl/88/3/10.1063/1.2165291
2006-01-17
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ultrasound-modulated optical parallel speckle measurement with stroboscopic illumination in a coaxial reflection system
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/3/10.1063/1.2165291
10.1063/1.2165291
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