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Related Concept Videos

Measuring Reaction Rates03:09

Measuring Reaction Rates

25.3K
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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Curvilinear Motion: Polar Coordinates01:27

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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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Polar and Cylindrical Coordinates01:22

Polar and Cylindrical Coordinates

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The Cartesian coordinate system is a very convenient tool to use when describing the displacements and velocities of objects and the forces acting on them. However, it becomes cumbersome when we need to describe the rotation of objects. So, when describing rotation, the polar coordinate system is generally used.
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Related Experiment Video

Updated: Jul 20, 2025

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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A simple polarimetric measurement based on a computational algorithm.

Xiaoqian Wang, Kean Zhu, Kaihua Zhu

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    |August 1, 2023
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    Summary
    This summary is machine-generated.

    A new compact polarimeter uses liquid-crystal variable retarders and a polarizer. This cost-effective device analyzes light intensity variations for polarization optics applications.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Polarimetry is crucial for analyzing light polarization.
    • Existing polarimeters can be bulky or expensive.

    Purpose of the Study:

    • To demonstrate a simple, compact, and cost-effective polarimeter.
    • To enable high-resolution polarimetric measurements.

    Main Methods:

    • Utilized two electrically controlled liquid-crystal variable retarders (LCVRs) and a linear polarizer.
    • Employed a computational algorithm to analyze modulated light intensity variations.
    • Integrated a power meter or CMOS camera for data acquisition.

    Main Results:

    • A proof-of-concept prototype was successfully built and tested.
    • Demonstrated the ability to measure spatially variant polarization states.
    • Verified the potential for resolution-lossless polarimetric measurements.

    Conclusions:

    • The proposed method offers a cost-effective solution for compact polarimeter realization.
    • The device is suitable for integration with standard optical power measurement tools.
    • This compact polarimeter advances polarization optics applications.