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Related Concept Videos

Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

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Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing
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Refractive Index Measurements using a CCD.

S M Mian, A Y Hamad, J P Wicksted

    Applied Optics
    |December 15, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel method for measuring the refractive index of materials using a CCD camera and laser beam profiler. The technique accurately determines Brewster

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Accurate measurement of the refractive index is crucial for characterizing optical materials.
    • Traditional methods like the minimum-deviation technique can be time-consuming and require specialized equipment.

    Purpose of the Study:

    • To develop and validate a rapid and precise method for determining the refractive index.
    • To utilize a charge-coupled device (CCD) camera and laser beam profiler in the Brewster's angle experiment.

    Main Methods:

    • Employed the Brewster's angle experiment setup.
    • Utilized a CCD camera and laser beam profiler for precise angle measurement.
    • Analyzed reflected laser beam profiles to identify Brewster's angle.

    Main Results:

    • Successfully isolated Brewster's angle with high accuracy, limited by the sample rotation stage resolution.
    • Achieved measurement uncertainties comparable to the standard minimum-deviation technique.
    • Demonstrated the efficiency and speed of the CCD-based method.

    Conclusions:

    • The CCD camera and laser beam profiler method offers a viable and accurate alternative for refractive index measurement.
    • This technique simplifies the experimental procedure and enhances measurement speed.
    • The findings support the adoption of this method in optical characterization.