Dresden 2017 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 8: Posters - Bioimaging and Spectroscopy
BP 8.19: Poster
Montag, 20. März 2017, 17:30–19:30, P3
Wavefront-shaping for flow-field measurements — •Bob Fregin1, Nektarios Koukourakis2, Jörg König3, Jürgen Czarske2, and Oliver Otto1 — 1Universität Greifswald, Greifswald, Germany — 2Technische Universität Dresden, Dresden, Germany — 3IFW Dresden, Dresden, Germany
Flow-field measurements within (non)-stationary fluid systems are important for several applications in process engineering and biomedical sciences. However, there are environments like biological tissues where experimental assays are impeded by aberrations or scattering. The latter could lead to a strong increase in measurement uncertainty. Supported by the technological progress of spatial light modulators (SLM) and wave front sensing techniques, sensor-based adaptive optics enables to overcome these limitations, as it allows for flexible and dynamic control of light-fields.
In this contribution we analyze the usage of time-reversal and wave front shaping techniques for both turbidity suppression and aberration correction. The effect of scattering or fluctuating media, e.g. inside a microcapillary, on the measurement accuracy of image-correlation based flow-field measurements is investigated and results of first measurements and simulations are presented and limitations are discussed. We show that time-reversal, digital holography and wavefront shaping techniques have the potential to strongly improve the quality of disturbed flow-field measurements with application inside Biology and Biochemistry.