What Are Sub-Nanometer Precision Mirrors?

What Does “Sub-Nanometer Precision” Really Mean?

A nanometer (nm) is one-billionth of a meter. Sub-nanometer precision refers to surface deviations smaller than that—often down to 0.05–0.1 nm RMS, approaching atomic-scale accuracy. To put this into perspective:

• These mirrors must maintain surface smoothness far below the wavelength of visible light
• Even the slightest deviation can significantly degrade performance in high-end optical systems

To read the entire article, visit Avantier, Inc.