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Related Concept Videos

Measuring Reaction Rates03:09

Measuring Reaction Rates

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 field in...
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In Situ Measurement of Vacuum Window Birefringence using 25Mg+ Fluorescence
07:03

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Published on: June 13, 2020

Two-film reflection polarizers: theory and application.

M Ruiz-Urbieta, E M Sparrow, P D Parikh

    Applied Optics
    |February 6, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces two-film reflection polarizers that achieve polarized light over a range of angles, unlike single-film polarizers. These systems offer high performance and stability for optical applications.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Single-film polarizers exhibit polarization at a single angle of incidence.
    • Developing polarizers with broader angular acceptance is crucial for advanced optical systems.

    Purpose of the Study:

    • To analyze the performance of two-film reflection polarizers on absorbing substrates.
    • To determine conditions for achieving polarized light over a range of incidence angles.

    Main Methods:

    • Theoretical analysis of reflectance for two transparent films on an absorbing substrate.
    • Development of a method to find angles of incidence for polarization extinction.
    • Numerical simulations for metallic substrates with varying reflectivity.

    Main Results:

    • Two-film polarizers enable polarized light generation over a finite range of incidence angles.
    • Discrete film thicknesses can be selected for polarization at specific angles.
    • Systems demonstrate high extinction ratios and robustness to off-design conditions.

    Conclusions:

    • Two-film polarizers offer significant advantages over single-film designs.
    • The described method facilitates the design of efficient and stable polarizing optical elements.