The two dimensional Molecular Tagging
Velocimetry (2D-MTV) is used to measure velocity fields of the flow
in a micro mixer. Instead of commonly used micro particles an
optical tagging of the flow is performed by using a caged dye. The
pattern generation is done by imaging a mask for the first time.
This allows to generate nearly any imaginable pattern. The flow
induces a deformation of the optically written pattern that can be
tracked by laser induced fluorescence. The series of raw images
acquired in this way are analyzed quantitatively with a novel
optical flow based technique. Reference measurements have been
carried out allowing to draw conclusions about the accuracy of this
procedure. A comparison to the standard technique of
Keywords: micro fluidic; MTV; optical flow; Raman; concentration distribution
