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Focusing Coherent Light through Volume Scattering Phantoms via Wavefront Shaping
Niklas Fritzsche1,2, Felix Ott1,2, Karsten Pink1,2
1Institut für Lasertechnologien in der Medizin und Meßtechnik an der Universität Ulm, D-89081 Ulm, Germany.
Sensors (Basel, Switzerland)
|October 28, 2023
Summary
Wavefront shaping (WFS) enhances light focusing in scattering media by controlling light intensity. This study investigates WFS behavior and intensity enhancement in engineered scattering phantoms with tunable optical properties.
Area of Science:
- Biomedical optics
- Light scattering
- Wavefront engineering
Background:
- Wavefront shaping (WFS) is crucial for improving imaging in scattering media.
- Focusing light through scattering materials enhances depth, sensitivity, and resolution in biomedical applications.
Purpose of the Study:
- To investigate wavefront shaping behavior and intensity enhancement in scattering media.
- To study the impact of scattering and absorption coefficients on light transmission.
- To develop and validate scattering phantoms with controlled optical properties.
Main Methods:
- Fabrication of epoxy resin-based phantoms with tunable scattering (TiO2) and absorption (dyes).
- Experimental characterization using an integrating sphere for transmission and reflection measurements.
- Theoretical analysis with a novel hybrid PN method for light flux calculation.
Main Results:
- Demonstrated control over scattering and absorption coefficients in fabricated phantoms.
- Experimental measurements aligned with theoretical predictions of light transmission and enhancement.
- Validated the hybrid PN method for accurate optical characterization.
Conclusions:
- Wavefront shaping effectively controls light intensity in scattering media.
- Engineered phantoms provide a reliable platform for studying light-matter interactions.
- The hybrid PN method offers accurate theoretical insights into light propagation.
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