A way to measure flow rate inside a microchannel using a contactless optical technique is reported. The optofluidic device consists of a Bragg grating written on a soft wall, namely a Mylar stripe glued on the top of a microfluidic channel. Diffraction of a white-light probe beam is used to detect the small displacements of the grating caused by the liquid flowing inside the microchannel. A simple model of the hydraulic circuit gives theoretical expressions for the response time of the diffracted signal allowing to fit the experimental data and determine the applied flow rates.
Optical measurement of flow rate in a microfluidic channel / Lucchetta, Daniele Eugenio; Vita, Francesco; Francescangeli, D.; Francescangeli, Oriano; Simoni, Francesco. - In: MICROFLUIDICS AND NANOFLUIDICS. - ISSN 1613-4982. - STAMPA. - 20:1(2016), pp. 9/1-9/5. [10.1007/s10404-015-1690-1]
Optical measurement of flow rate in a microfluidic channel
LUCCHETTA, Daniele Eugenio
;VITA, Francesco
;FRANCESCANGELI, ORIANO;SIMONI, Francesco
2016-01-01
Abstract
A way to measure flow rate inside a microchannel using a contactless optical technique is reported. The optofluidic device consists of a Bragg grating written on a soft wall, namely a Mylar stripe glued on the top of a microfluidic channel. Diffraction of a white-light probe beam is used to detect the small displacements of the grating caused by the liquid flowing inside the microchannel. A simple model of the hydraulic circuit gives theoretical expressions for the response time of the diffracted signal allowing to fit the experimental data and determine the applied flow rates.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
