Based on a fascinating fractal optical interference feature, Talbot-Effect Structured Illumination (TESI) is implemented into two laser-based diagnostics used in experimental fluid dynamics: laser-induced fluorescence (LIF) and molecular tagging velocimetry (MTV). The developed technique offers a broad range of resolution, down to 10 µm, and is demonstrated with 3D surface reconstruction of a free surface (TESI-LIF) and with velocity measurements in water (TESI-MTV), opening new possibilities for small scale measurements of wall turbulence and interfacial transfers.
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