Open AccessSpiral phase mask shadow-imaging for 3D-measurement of flow fields
Author(s) -
M. Teich,
Michael R. Mattern,
Jeremy Sturm,
Lars Büttner,
Jürgen Czarske
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.027371
Subject(s) - optics , particle tracking velocimetry , velocimetry , tracking (education) , spiral (railway) , particle image velocimetry , image resolution , spatial light modulator , microfluidics , structured light , flow visualization , phase imaging , flow (mathematics) , physics , microscopy , psychology , pedagogy , mathematical analysis , mathematics , mechanics , turbulence , thermodynamics
Particle tracking velocimetry (PTV) is a valuable tool for microfluidic analysis. Especially mixing processes and the environmental interaction of fluids on a microscopic scale are of particular importance for pharmaceutical and biomedical applications. However, currently applied techniques suffer from the lag of instantaneous depth information. Here we present a scan-free, shadow-imaging PTV-technique for 3D trajectory and velocity measurement of flow fields in micro-channels with 2 µm spatial resolution. By using an incoherent light source, one camera and a spatial light modulator (LCoS-SLM) that generates double-images of the seeding particle shadows, it is a simply applicable and highly scalable technique.