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Interferometric method of measuring external cylindrical surfaces.

Qing Zhou, Junhua Wang, Min Xu

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    Summary
    This summary is machine-generated.

    A novel non-contact method uses a ring beam transform unit for precise external cylindrical surface measurement. This fast, stitching-free technique offers significant advantages over traditional methods.

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    Area of Science:

    • Optical metrology
    • Surface characterization
    • Precision engineering

    Background:

    • Accurate measurement of external cylindrical surfaces is crucial in manufacturing and quality control.
    • Traditional methods often involve physical contact, limiting speed and potentially damaging surfaces.
    • Existing non-contact methods may require complex stitching processes, increasing measurement time and error.

    Purpose of the Study:

    • To introduce a new, non-contact method for measuring external cylindrical surfaces.
    • To demonstrate the effectiveness of a ring beam transform unit for this purpose.
    • To evaluate the precision and efficiency of the proposed measurement technique.

    Main Methods:

    • Development of a ring beam transform unit utilizing three cone mirrors.
    • Transformation of a parallel beam into annular and convergent beams for surface illumination.
    • Utilizing a dynamic interferometer to experimentally validate the measurement method.

    Main Results:

    • The proposed method achieves non-contact measurement, eliminating surface damage concerns.
    • Measurements are fast and stitching-free, enhancing operational efficiency.
    • Experimental results show an RMS difference of 0.0282 µm for axis contour and 0.0962 µm for roundness difference compared to Luphoscan.

    Conclusions:

    • The ring beam transform unit provides a viable solution for precise, non-contact cylindrical surface metrology.
    • The method's speed and accuracy make it a promising alternative to conventional techniques.
    • Further research can explore applications in various industrial fields requiring high-precision surface analysis.