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Single-shot three-dimensional shape measurement by low-coherent optical path difference digital holography.

Yuji Tanaka, Yutaka Mori, Takanori Nomura

    Applied Optics
    |October 17, 2014
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    Summary

    This study introduces a low-energy, single-shot 3D shape measurement technique using digital holography. The method accurately reconstructs object shapes, confirmed by experimental validation.

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    Area of Science:

    • Optical Metrology
    • Holography
    • 3D Imaging

    Background:

    • Traditional 3D shape measurement methods can be complex and energy-intensive.
    • Digital holography offers potential for advanced metrology but requires efficient implementations.

    Purpose of the Study:

    • To propose a novel single-shot 3D shape measurement technique.
    • To achieve low energy consumption in optical path difference digital holography.
    • To validate the method's accuracy and explore its parameters.

    Main Methods:

    • Utilizing low-coherent optical path difference digital holography.
    • Employing a superluminescent diode as the light source.
    • Performing weighted single hologram analysis and numerical reconstruction.

    Main Results:

    • Successful single-shot 3D shape measurement of a button cell battery surface.
    • Validation of the proposed method against a vertical scanning method.
    • Analysis of the impact of hologram shift interval and zero-order component on results.

    Conclusions:

    • The proposed low-energy, single-shot digital holography method is effective for 3D shape measurement.
    • The technique demonstrates accuracy comparable to established methods.
    • Understanding parameter effects is crucial for optimizing measurement precision.