Image Based Micro Flow Measurement Technology

Microchannel Flow Measurement Using Micro Particle Image Velocimetry

Since microfabrication techniques are typically planar processes, microchannel flows typically have significant predevelopment due to the upstream reservoir having the same height as the microchannel. The main concerns of the current study are categorized into finding the effects of typical microchannel geometry on the velocity entrance length in the laminar flow regime and providing the turbul...

Infrared Micro-Particle Image Velocimetry Measurement in Silicon-Based Microdevices

Quantitative measurement of dynamic flow induced by Tetrahymena pyriformis (T. pyriformis) using micro-particle image velocimetry

In-depth quantitative visualization studies are required to understand the flow induced by swimming micro-organisms and find potential applications. The present study visualized the flow induced by Tetrahymena pyriformis of size 45–50 lm, which swam freely and via stimulation by galvanotaxis in a PDMS micro-chamber using a micro-particle image velocimetry system. The results showed that the max...

Dielectrophoresis Based Micro Flow Cytometry.

We report a simplified flow cytometer design that makes use of negative dielectrophoresis (DEP) for particle focusing and integrated optical and AC impedance detectors to enable an inexpensive, compact and robust system for cell and particle characterization. This straightforward, modular design could be applied as a standalone instrument or as a particle detector in an integrated micro total a...

Image-Based BRDF Measurement

We present a new image-based process for measuring surface reflectance rapidly, completely, and accurately. Requiring only a digital camera, a light source, and a convex curved test sample, our method can measure the BRDF with high resolution and accuracy over a very large domain of illumination and reflection directions. We have verified our measurements both by tests of internal consistency a...