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Related Experiment Video

Updated: Jul 9, 2026

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

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

Published on: February 27, 2013

Laser surface profiler.

A S Chu, M A Butler

|December 12, 2007

Summary

This study presents a novel instrument for measuring surface topography. It uses laser reflection to accurately map surface slopes with high resolution, enabling detailed surface analysis.

Area of Science:

Optics and Photonics
Surface Metrology
Materials Science

Background:

Accurate characterization of surface topography is crucial in various scientific and industrial fields.
Traditional methods for measuring surface slope can be complex and time-consuming.
Developing non-contact, high-resolution techniques for surface analysis is an ongoing challenge.

Purpose of the Study:

To develop and validate a novel instrument for direct measurement of surface slope.
To achieve high angular and lateral resolution in surface topography mapping.
To create a gray-scale imaging technique for visualizing surface normal variations.

Main Methods:

Utilizing a laser beam and a position-sensitive detector to measure the angle of reflection.

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Last Updated: Jul 9, 2026

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Implementing a system for repeated measurements across the reflective surface.

Employing focused laser beams to achieve fine lateral resolution.

Main Results:

Direct determination of surface-normal direction changes (slope) with a resolution better than 0.01 degrees.
Achieved a lateral resolution of 5 micrometers (µm) by focusing the laser beam.
Estimated resolvable surface-height change due to slope variation is less than 1 nanometer (nm).

Conclusions:

The developed instrument provides a highly sensitive and accurate method for surface slope measurement.
The technique allows for detailed, high-resolution mapping of surface topography.
This approach offers a promising tool for advanced surface characterization and analysis.