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Schematic of phase-resolved ODT system: (SLD) superluminescent diode; (C2) coupler; (PC) polarization controller; (EOM) electro-optical modulator; (RSOD) rapid scanning delay line; (C1) collimator; (G) grating; (L) lens; (M) galvo mirror; (OL) objective lens; (PD) photon diode; (MC) microchannel; (R) reservoir; (SS): substrate; anode; cathode; (PS) PDMS; analog to digital converter; (DP) data processor.
(Color) Cross-sectional velocity measurements of flows through all-PDMS and PDMS-glass channels by ODT: (a) cross-sectional velocity image of flow in all-PDMS channel; (b) cross-sectional velocity image of flow in PDMS-glass channel; (c) comparison of flow profiles at the center of both channel. Channel dimension: . Working fluids: mixture of intralipid and phosphate solution. Applied electrical field: .
(Color) Monitoring of EOF responding to applied pulsed electrical field for : (a) time-evolutionary image of EOF taken by ODT at the center of channel, (b) driving electrical field: square wave with an amplitude of and changing of velocity. Channel dimension: . Working fluids: mixture of polystyrene beads and phosphate solution.
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