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Phase stepping optical profilometry using fiber optic Lloyd's mirrors.

Gülşen Kösoğlu, Heba Yüksel, Mehmet Naci Inci

    Applied Optics
    |February 3, 2016
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    Summary
    This summary is machine-generated.

    This study introduces a novel fiber optic Lloyd's mirror for 3D object shape measurement using phase stepping profilometry. The simple, cost-effective method accurately captures 3D topographies, unaffected by environmental changes.

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    Area of Science:

    • Optics and Photonics
    • Metrology
    • Surface Characterization

    Background:

    • Optical profilometry is crucial for 3D surface measurement.
    • Traditional methods can be sensitive to environmental factors and complex to set up.
    • Phase stepping techniques enhance measurement accuracy by analyzing fringe patterns.

    Purpose of the Study:

    • To develop and demonstrate a novel, robust, and cost-effective optical profilometry system for 3D object shape measurement.
    • To utilize a fiber optic Lloyd's mirror assembly for phase stepping.
    • To achieve accurate 3D topography reconstruction insensitive to environmental disturbances.

    Main Methods:

    • A three-step phase stepping profilometry technique was implemented.
    • A fiber optic Lloyd's mirror assembly was used for generating interference fringes.
    • Phase shifts of π/2 were achieved by mechanical translation of the Lloyd's assembly using a micrometer stage.
    • Interferograms were captured using a CCD camera and processed algorithmically.

    Main Results:

    • The system successfully measured the shapes of 3D objects.
    • The fiber optic Lloyd's mirror approach provided accurate 3D topographies.
    • The setup demonstrated robustness against ambient temperature fluctuations and environmental vibrations.
    • The method is simple and low-cost to construct.

    Conclusions:

    • Fiber optic Lloyd's mirror-based phase stepping profilometry is a viable and effective technique for 3D object measurement.
    • The developed system offers a simple, low-cost, and environmentally stable solution for optical profilometry.
    • This method provides accurate 3D topography data suitable for various applications.