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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Condensed Matter Physics

    Background:

    • Understanding light propagation in scattering media is crucial for applications like diffuse imaging.
    • Traditional methods for probing material transport properties can be complex and time-consuming.
    • Speckle patterns generated by light interacting with materials offer rich information.

    Purpose of the Study:

    • To demonstrate a novel experimental probe for analyzing multiple scattering materials.
    • To characterize the static and dynamic transport properties of opaque scattering media.
    • To explore the potential of this technique for advanced diffuse imaging.

    Main Methods:

    • Utilizing a tunable wavelength light source focused onto an opaque sample surface.
    • Recording spatial and frequency speckle patterns using a CCD and acousto-optical tunable filter.
    • Analyzing average intensity and frequency correlations as a function of source distance.

    Main Results:

    • Successfully demonstrated the technique on a white paint sample.
    • The method effectively captures spatial and frequency speckle patterns.
    • The analysis yields insights into both static and dynamic transport properties.

    Conclusions:

    • The developed probe offers a facile and rapid method for characterizing scattering materials.
    • This technique shows promise for static and time-resolved diffuse imaging in highly scattering media.
    • The experimental setup is adaptable as an add-on for standard microscopy.