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Related Concept Videos

Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

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A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
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The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
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Related Experiment Video

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Author Spotlight: Non-Invasive Imaging of Complex Bio-Structures Using Polarization-Sensitive Two-Photon Microscopy
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Polarization modulation for imaging behind the scattering medium.

Niraj Kumar Soni, R V Vinu, Rakesh Kumar Singh

    Optics Letters
    |March 15, 2016
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a polarization modulation technique to image objects hidden behind scattering media. The method utilizes polarization properties of scattered light for clear object reconstruction.

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    Area of Science:

    • Optics and Photonics
    • Image Reconstruction
    • Polarimetry

    Background:

    • Imaging through scattering media is challenging due to light depolarization and distortion.
    • Polarization-based techniques offer potential for retrieving object information from scattered light.

    Purpose of the Study:

    • To develop and demonstrate a polarization modulation technique for imaging polarization-discriminating objects obscured by scattering media.
    • To leverage the relationship between scattered light polarization and source structure for enhanced imaging.

    Main Methods:

    • Utilizing polarization modulation for object illumination.
    • Analyzing the complex correlation function of scattered orthogonal polarization components.
    • Applying a backpropagation approach with polarimetric parameters for object plane reconstruction.

    Main Results:

    • Successful experimental demonstration of the proposed imaging technique.
    • Imaging of two distinct objects hidden behind scattering media was achieved.
    • The technique effectively reconstructs object information by utilizing polarization properties.

    Conclusions:

    • Polarization modulation is a viable method for imaging through scattering media.
    • The developed technique enhances object reconstruction by exploiting polarimetric parameters.
    • This approach offers a novel solution for non-invasive imaging in complex environments.