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Linearly coded profilometry.

Q Fang, S Zheng

    Applied Optics
    |April 10, 1997
    PubMed
    Summary
    This summary is machine-generated.

    A novel optical profilometry technique, linearly coded profilometry (LCP), uses coded light structures for faster surface measurement. This method offers a speed advantage over traditional phase-measuring profilometry.

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    Area of Science:

    • Optics and Photonics
    • Metrology and Measurement Science

    Background:

    • Optical profilometry is crucial for surface characterization.
    • Existing methods like phase-measuring profilometry have limitations in speed.

    Purpose of the Study:

    • To introduce a new optical profilometry technique called linearly coded profilometry (LCP).
    • To demonstrate LCP's capability for rapid and reliable surface profile measurement.

    Main Methods:

    • Utilizing a sawtoothlike linear light structure for surface coding.
    • Employing a phase-shifting technique for profile decoding.
    • Proposing two coding-light structures: right-angle and isosceles triangle teeth.

    Main Results:

    • Developed general and specific decoding methods for different coding structures.

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  • Investigated optimal sampling and measurement error for a specific case.
  • Experimental validation confirmed the reliability of LCP.

    • Conclusions:

    • Linearly coded profilometry (LCP) is a viable alternative to phase-measuring profilometry.
    • LCP achieves a faster measuring speed compared to existing techniques.