4D Technology is a leader in innovative metrology products for measuring surface quality and surface defects on precision surfaces, as well as the surface and wavefront quality of optics. 4D’s patented Dynamic Interferometry^®technology enables 4D’s laser interferometry products to measure in difficult environments, where vibration, air turbulence or rapid motion have traditionally prevented accurate measurement. 

New instruments in surprising situations

Using our unique and proprietary dynamic measurement techniques, our award-winning laser interferometer technology is used in to a wide variety of applications, including:

• factory-floor inspection
• telescope mirrors and systems
• biomedical research
• environmental sensing and imaging
• and much more

We collaborate with institutions and companies to create and manufacture accurate metrology for tough environments and difficult measurements.

Optical Components

• Flat (plano) optics
• Spherical optics
• Large optics
• Aspheric optics
• Infrared IR optics
• Lithography optics
• Prisms and corner cubes
• Space-based optics
• Transmitted wavefront
• Homogeneity
• Birefringence/stress
• In situ polishing metrology
• Roughness and finish

Optical Systems

• Telescope primary mirrors
• Telescope secondary mirrors
• Segmented mirrors
• Long path measurements
• Shop floor metrology
• Clean room metrology
• Cryo-vac and thermal chamber testing
• Adaptive optics

Substrates

• Glass substrates
• Semiconductor wafers

Dynamic Structures

• Adaptive optics
• MEMS (Micro-Electro-Mechanical Systems)
• Diffuse surfaces

Precision Surfaces

• Surface roughness
• Surface defects
• Machined components
• Corrosion

Sensing and Imaging

• Polarimetry
• Birefringence measurement
• 3D shape
• Remote sensing
• Machine vision
• Autonomous vehicle vision

Medical and Biological

• Opthalmic applications
• In vivo measurement

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