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Opt Express. 2011 Sep 26;19(20):19245-54. doi: 10.1364/OE.19.019245.

Digital holographic tracking of microprobes for multipoint viscosity measurements.

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  • 1DIMA, Universit√† di Roma La Sapienza, Via Eudossiana, 18, 00184, Roma, Italy.


Digital holographic microscopy provides an ideal tool for 3D tracking of microspheres while simultaneously allowing a full and accurate characterization of their main physical properties such as: radius and refractive index. We demonstrate that the combination of high resolution multipoint tracking and accurate optical sizing of tracers provides an ideal tool for precise multipoint viscosity measurements. We also report a detailed evaluation of the technique's accuracy and precision in relation to the primary sources of error.

© 2011 Optical Society of America

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