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Related Experiment Video

Updated: Jun 15, 2026

Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments
11:47

Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments

Published on: February 27, 2013

Rough surface interferometry at 10.6 microm.

O Kwon, J C Wyant, C R Hayslett

    Applied Optics
    |March 12, 2010
    PubMed
    Summary
    This summary is machine-generated.

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    See all related articles

    This study introduces an Infrared Twyman-Green interferometer for testing rough surfaces using a carbon dioxide (CO2) laser. It details how fringe contrast relates to surface roughness, enabling precise optical measurements.

    Area of Science:

    • Optics and Photonics
    • Metrology and Measurement Science

    Background:

    • Traditional interferometry is limited in testing rough surfaces.
    • Infrared interferometry offers potential for new measurement capabilities.

    Purpose of the Study:

    • To describe an Infrared Twyman-Green interferometer for rough surface testing.
    • To analyze the relationship between fringe contrast and surface roughness.
    • To present experimental results and alignment techniques for rough optics.

    Main Methods:

    • Utilized a continuous-wave (cw) carbon dioxide (CO2) laser emitting at 10.6-micrometer wavelength.
    • Performed theoretical analysis correlating interference fringe contrast with root-mean-square (rms) surface roughness.
    • Conducted experimental measurements and developed special alignment methods.

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    Last Updated: Jun 15, 2026

    Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments
    11:47

    Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments

    Published on: February 27, 2013

    Implementation of a Reference Interferometer for Nanodetection
    16:11

    Implementation of a Reference Interferometer for Nanodetection

    Published on: April 26, 2014

    Quantitative Hardness Measurement by Instrumented AFM-indentation
    08:21

    Quantitative Hardness Measurement by Instrumented AFM-indentation

    Published on: November 22, 2016

    Main Results:

    • Established a quantitative relationship between fringe contrast and surface roughness.
    • Demonstrated the feasibility of interferometric testing for rough optical surfaces.
    • Validated theoretical predictions with experimental data.

    Conclusions:

    • The developed Infrared Twyman-Green interferometer is effective for characterizing rough surfaces.
    • Fringe contrast serves as a reliable indicator of surface roughness in this setup.
    • The study provides practical methods for aligning and testing optics with significant surface irregularities.