White Light Interferometer

The White Light Interferometer from Atometrics is a high-precision optical instrument designed for non-contact measurement of surface profiles and thin film thicknesses. By utilizing broadband white light and advanced interference analysis, it achieves nanometer-level vertical resolution, enabling accurate 3D characterization of microstructures and coatings.

Working Principle

A white light interferometer works by splitting a broadband light source into two paths—one directed toward the sample and the other toward a reference mirror. When the reflected beams recombine, interference fringes are produced. The system analyzes the fringe pattern to calculate the height variation or film thickness at each point. This technique offers exceptional precision and stability without physically touching the surface.

Main Features

• Nanometer-level precision: Provides ultra-high vertical resolution for surface topography and film analysis.
• Non-contact optical measurement: Prevents surface damage, ideal for soft or delicate materials.
• 3D imaging capability: Captures detailed microstructures with full-field visualization.
• Fast scanning and processing: Delivers high-speed inspection suitable for production environments.
• Stable and repeatable performance: Ensures consistent results across materials and batches.

Applications

Atometrics white light interferometer systems are widely applied in research and industrial inspection, including:

• Semiconductor wafer surface and thin film measurement
• Optical lens and mirror form testing
• MEMS and microstructure characterization
• Coating and surface roughness analysis
• Precision manufacturing quality control

Advantages of Atometrics

Atometrics is a specialist in high-precision measuring instruments. Our white light interferometers integrate advanced optical technology with intelligent data processing to deliver reliable, high-resolution measurements. Designed for both R&D and industrial environments, our systems ensure accuracy, repeatability, and ease of use for modern precision metrology.

Conclusion

With Atometrics White Light Interferometer solutions, manufacturers and researchers can achieve superior accuracy in surface and thickness measurement. Our systems bring optical precision and automation together, supporting innovation in semiconductors, optics, and materials science.