Ian Stevenson

Principal Engineer, Edmund Optics

Ian Stevenson is principal engineer at Edmund Optics (Barrington, NJ).

FIGURE 1. Shown is an example of laser-induced damage on the surface of an optic imaged using differential interference contrast (DIC) microscopy.

Spectroscopy and Optics: Laser mirrors: High reflectance is measured best with cavity ring-down spectroscopy

April 1, 2019
For mirrors with reflectance values above 99.5%, measuring total loss through cavity ring-down spectroscopy is more accurate than conventional methods.