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Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
903

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Related Experiment Video

Updated: Jun 21, 2025

Three-dimensional Super Resolution Microscopy of F-actin Filaments by Interferometric PhotoActivated Localization Microscopy iPALM
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Vibration-resistant Fizeau interferometry using three-cavity multiplexing.

Yi Zong, Mingliang Duan, Caiyun Yu

    Optics Letters
    |July 15, 2024
    PubMed
    Summary

    This study introduces a novel three-cavity multiplexing (TCM) system for vibration-resistant Fizeau interferometry. The TCM effectively measures phase and vibration, overcoming environmental disturbances with a simplified, common-path design.

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    Area of Science:

    • Optics and Photonics
    • Metrology
    • Interferometry

    Background:

    • Fizeau interferometry is crucial for high-precision measurements.
    • Environmental vibrations often degrade the accuracy of interferometric measurements.
    • Existing methods struggle with vibration compensation and complex system setups.

    Purpose of the Study:

    • To develop a vibration-resistant Fizeau interferometry method.
    • To enable simultaneous measurement of phase and vibration information.
    • To simplify the testing process and reduce system complexity.

    Main Methods:

    • A three-cavity multiplexing (TCM) approach was developed.
    • A vibration-measurement pass (VMP) was integrated with the Fizeau phase-measurement pass (PMP).
    • Vibration information was extracted using temporal differences of mixed fringes and synchronous phase-shifting.

    Main Results:

    • The TCM system successfully transmitted phase and vibration information.
    • Vibration data was demultiplexed and used to correct phase measurements.
    • Experimental validation confirmed the feasibility and performance of the TCM.

    Conclusions:

    • The proposed TCM is the first to address vibration effects and null-fringe demodulation simultaneously.
    • The system offers a common path, simple testing, and low complexity.
    • This method significantly enhances the robustness and practicality of Fizeau interferometry.