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Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes
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Fringe-scanning method using a general function for shadow moiré.

Y Arai, S Yokozeki, T Yamada

    Applied Optics
    |November 6, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A novel high-resolution 3D measurement technique uses shadow moiré and fringe scanning for precise object shape detection. This method achieves high accuracy in both static and dynamic measurements, advancing optical metrology.

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    Area of Science:

    • Optical Metrology
    • 3D Measurement Techniques
    • Image Processing

    Background:

    • Shadow moiré is a common technique for surface profiling.
    • Existing methods often rely on specific mathematical functions (e.g., arctangent) for fringe analysis.
    • Limitations exist in achieving high accuracy for both static and dynamic measurements.

    Purpose of the Study:

    • To introduce a new high-resolution 3D measurement method for shadow moiré.
    • To enhance the accuracy and versatility of shadow moiré measurements.
    • To develop systems for both static and dynamic 3D surface profiling.

    Main Methods:

    • Utilizes shadow moiré to generate moiré fringes.
    • Employs a fringe-scanning technique for enhanced data acquisition.
    • Applies a general function for object shape detection, enabling numerical analysis.
    • Proposes two distinct systems for static and dynamic measurement applications.

    Main Results:

    • Achieved measurement accuracies exceeding 1/50 fringes for static measurements.
    • Demonstrated measurement accuracies greater than 1/40 fringes for dynamic measurements.
    • Validated the effectiveness of the general function approach for shape analysis.

    Conclusions:

    • The proposed high-resolution 3D shadow moiré method offers superior accuracy.
    • The technique is applicable to both static and dynamic measurement scenarios.
    • Numerical analysis of a general function provides a robust approach to fringe analysis.