I n this article, we present a wide angle, frequency scanning interferometer (FSI) system capable of measuring the absolute distance to multiple targets simultaneously.

As a physicist who explores ways to measure light more accurately, it should come as no surprise that I’m fascinated by even common optical phenomena that we see all around us (e.g., rainbows or oil slicks on butterfly wings).

A collaboration between NIST researchers and a private-sector firm has led to the development of a commercial device to fill a critical need in industry: calibration of laser tracking systems.