Researchers at the National Institute of Standards and Technology (NIST) have developed a dramatically improved laser-based instrument that measures the diameter of fine-gauge wires, fibers and other objects only about three times the thickness of a human hair. Known as a laser micrometer, the device’s accuracy equals that of its state-of-the-art counterparts but is cheaper, simpler to operate and easier to maintain.
Click here for original story, Fourth-generation wire micrometer that rivals best in the world
Source: Phys.org