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Fourier transform optical profilometry using fiber optic Lloyd's mirrors.

Türkay Kart, Gülşen Kösoğlu, Heba Yüksel

    Applied Optics
    |January 22, 2015
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a compact fiber optic Lloyd's mirror system for 3D shape detection. The technique offers a stable and robust method for surface profilometry, outperforming existing systems.

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    Area of Science:

    • Optics
    • Metrology
    • Optical Engineering

    Background:

    • Surface profilometry is crucial for 3D shape detection.
    • Existing systems often rely on expensive and complex optical components.
    • There is a need for compact, stable, and cost-effective profilometry solutions.

    Purpose of the Study:

    • To develop and demonstrate a novel fiber optic Lloyd's mirror assembly for 3D rigid body shape detection.
    • To present two distinct fiber optic Lloyd's configurations for generating varied interference patterns.
    • To evaluate the system's performance, stability, and ease of configuration compared to existing methods.

    Main Methods:

    • Utilizing a single-mode optical fiber and a flat mirror for linear fringe patterns.
    • Employing a single-mode optical fiber in a v-groove with orthogonal mirrors for square fringe patterns.
    • Projecting structured light patterns onto 3D objects and capturing fringe deformations with a digital CCD camera.
    • Processing fringe patterns using Fourier transform techniques for 3D surface topography reconstruction.

    Main Results:

    • Successfully generated linear and square interference patterns using fiber optic Lloyd's mirror assemblies.
    • Demonstrated the ability to reconstruct 3D surface topography from deformed fringe patterns.
    • Showcased the system's compactness, stability, and ease of configuration.
    • Observed enhanced robustness against environmental disturbances like temperature fluctuations and vibrations.

    Conclusions:

    • The proposed fiber-optic Lloyd's technique provides a compact, stable, and cost-effective solution for 3D surface profilometry.
    • This method offers a significant advantage over traditional surface profilometry systems by eliminating the need for expensive optical equipment.
    • The system's robustness makes it suitable for practical applications requiring reliable 3D shape detection in varying environments.