4D Technology, a subsidiary of Onto Innovation, designs and manufactures optical surface gauges, surface roughness profilers and other metrology for accurate 3D, non-contact measurement of precision surfaces. 4D products use patented, state-of-the-art technology to bring high resolution measurement to production environments, even in the presence of severe vibration and turbulence. Our metrology solutions serve semiconductor, aerospace, automotive, medical device, and precision manufacturing industries requiring high-accuracy surface measurement and quality control.