4D Technology Corporation

4D Technology, a subsidiary of Onto Innovation, has been a leading provider of innovative metrology products for over 20 years. Their expertise lies in measuring surface quality, surface defects on precision surfaces, and the surface and wavefront quality of optics. The company has revolutionized the field with its patented Dynamic Interferometry® technology, which enables accurate measurements in challenging environments that are prone to vibration, air turbulence, or rapid motion.

4D Technology's interferometers have played a crucial role in ensuring the quality of various telescope projects, including those undertaken by NASA. They have been used to measure the alignment of multi-mirror components, supporting structures, and even conducted tests in cryo- and vacuum-chamber conditions.

With a global network of distributors and a dedicated customer support organization, 4D Technology ensures that customers' investments continue to operate at peak capability for an extended period. Their laser interferometer technology, based on dynamic measurement techniques, finds applications in factory-floor inspection, biomedical research, environmental sensing and imaging, telescope systems, and more.

Headquartered in Tucson, Arizona, 4D Technology offers a range of optical metrology and industrial measurement products. These include Fizeau Interferometers, Twyman-Green Interferometers, Optical Surface Profilers, 4D InSpec Surface Gage, 4D InSpec XL Surface Gage, Robotic Inspection systems, and surface analysis software.