4D Technology, an Onto Innovation Subsidiary Email Format
Appliances, Electrical, and Electronics ManufacturingArizona, United States11-50 Employees
4D Technology, a wholly owned subsidiary of Onto Innovation, designs and manufactures laser interferometers, surface roughness profilers, and interferometry accessories for measuring optics, optical systems, and precision-machined surfaces. Headquartered in Tucson, Arizona, at 3280 East Hemisphere Loop Suite 146, the company employs 11–50 people. Its products are designed for deployment in production environments and can operate in the presence of severe vibration and turbulence. 4D Technology's interferometers and profilometers are used in astronomy, aerospace, optical testing, and other industries, supporting measurements from space-based projects to high-throughput production of precision components. Recent developments include the launch of the 4Di InSpec SR roughness measurement system in June 2026, the AccuFiz Duo Fizeau interferometer introduced in 2024, and recognition as a FANUC collaborative robot device supplier in 2025.