4D Technology, an Onto Innovation subsidiary, is a global leader in dynamic, high-precision, three-dimensional surface metrology, offering non-contact dynamic laser interferometers, optical profilers, and surface gauges. With vibration-insensitive measurements, customers gain portability, easy integration into robotics, and measurements in difficult/turbulent environments. Applications include precision machined surfaces, optics and optical systems, astronomy, aerospace, defense, space telescopes, automotive, and in-line production measurements.