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Related Concept Videos

Curvilinear Motion: Polar Coordinates01:27

Curvilinear Motion: Polar Coordinates

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In polar coordinates, the motion of a particle follows a curvilinear path. The radial coordinate symbolized as 'r,' extends outward from a fixed origin to the particle, while the angular coordinate, 'θ,' measured in radians, represents the counterclockwise angle between a fixed reference line and the radial line connecting the origin to the particle.
The particle's location is described using a unit vector along the radial direction. Deriving the particle's position...
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Viscous forces, like friction, are intermolecular forces that resist the relative motion of molecules over each other. When a solid body moves through a liquid, viscous forces drag it in the opposite direction. The force's magnitude depends on the solid's shape and size, as well as its speed and the liquid's coefficient of viscosity, density and temperature.
The expression for the force on a solid spherical object in a fluid is called Stokes' law. Stokes' law is valid only...
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Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical...
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Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
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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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Related Experiment Video

Updated: Jul 12, 2025

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Published on: February 28, 2016

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Real-time Stokes polarimetry using a polarization camera.

Mitchell A Cox, Carmelo Rosales-Guzmán

    Applied Optics
    |October 19, 2023
    PubMed
    Summary

    Researchers developed a novel Stokes Camera for real-time spatial polarization measurement. This digital system offers a fast, one-shot solution for analyzing light polarization, crucial for optical research.

    Area of Science:

    • Optical Physics
    • Polarization Optics

    Background:

    • Polarization is a fundamental property of light.
    • Spatially resolved polarization measurements are essential in various optical applications.
    • Existing methods can be complex or time-consuming.

    Purpose of the Study:

    • To introduce a novel experimental setup for real-time measurement of spatially resolved Stokes parameters.
    • To provide a simple, digital, and one-shot solution for polarization analysis.

    Main Methods:

    • Utilized a polarization-sensitive camera.
    • Incorporated a fixed quarter-wave plate.
    • Developed accompanying code for data computation.

    Main Results:

    • Demonstrated real-time measurement of spatial amplitude and polarization.

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  • Achieved spatially resolved Stokes parameter determination.
  • Successfully used vector vortex beams for device demonstration.

    • Conclusions:

    • The Stokes Camera offers an efficient digital method for polarization measurement.
    • The system's speed is limited by camera frame rate and computational processing.
    • This technique simplifies the analysis of light polarization properties.