For example, components must be machined to within an accuracy of 1 micron (1 millionth of a meter). Many material structures and features can be no larger than 100 nanometers, which is just 1/1,000th the width of a human hair. And a capsule must have a smoothness tolerance approaching 1 nanometer—equivalent to removing all features on the Earth’s surface taller than 60 meters (about 200 feet). Each target is characterized using an array of specialized optical, x-ray and mechanical inspection systems.
Partners in Precision Engineering: Big Lasers, Tiny Targets