Industry standard for precision and innovation: vibration-insensitive 3D measurement
4D Technology is the leader in high-resolution surface, geometry and wavefront measurements for challenging locations and applications.
Discover our Products & Solutions


Optical Metrology
Astronomy, Optics Manufacturing, Aerospace & Defense, Free-space Optics & Research
4D Technology’s Optical Metrology Products assure the quality of precision optics and optical systems. Our Dynamic Interferometry assures the surface and wavefront quality, despite vibration or turbulence.
It’s no surprise that virtually every space- and ground-based telescope for the last two decades has been tested with 4D instruments.
Across the spectrum, from UV to LWIR, 4D instruments, technology and software are everywhere optics are made and used.
Industrial Inspection
Aerospace, Aviation, MRO, Precision Machining, Medical Devices, Renewable Energy & Automotive
High-resolution, optical 3D measurement gauges you can bring right to your part. With one-button operation, quickly and accurately quantify defects such as pits, scratches, and corrosion and geometries such as edge break, chamfers, and radius.
Handheld, shop floor, and automated capabilities.


Measurement anywhere.
PhaseCam Twyman Green
- Twyman-Green interferometer
- Patented instantaneous, vibration-immune technology
- Concave optics, meter-class telescope optics, large imaging system alignment, moving parts
- VISIBLE-NIR-SWIR-LWIR
AccuFiz Fizeau
- Fizeau interferometer with dynamic interferometry
- Flats, lenses, vacuum/environmental chambers
- VISIBLE-NIR-SWIR
NanoCam Optical Profiler
- Patented instantaneous, vibration-immune surface roughness profiler
- Optical polish and surface finish
- Angstrom-level resolution
4D InSpec Optical Surface Gauge
- Patented instantaneous 3D surface measurement
- Portable, shop floor measurements
- Measure features such as edge break, chamfers, and radii and defects such as pits, dents, and corrosion
- Measure down to 2 microns
- Handheld, workstation, or robot-mounted
4Di InSpec AMS
- Automated surface defect and feature inspection
- High-throughput, high-resolution
- Measure dozens of features and defects in minutes rather than days
4D SurfSpec Coating Gauge
- Coating assurance gauge
- < 15nm resolution
- Raw materials, e-coat, & painted surfaces
- Portable handheld or robot-mounted
References for Optical Testing
Why Choose 4D?
What’s New

4D Technology Approved as FANUC Cobot Device Supplier with Launch of New Integration Plug-In
4D Technology Releases New FANUC Cobot Integration Plug-in for 4Di InSpec

IR Interferometery: How to Choose the Best System for Your Application
White Paper: IR Interferometry - How to Choose the Best Interferometer for Your Application4D Technology interferometers support the precision metrology across the infrared spectrum; from NIR to LWIR Infrared (IR) imaging is a cornerstone of modern optical systems,...

Webinar: Industry Adoption of 3D Optical Surface Gauges
In this webinar hosted by Aerospace Testing International, Dr. Erik Novak, Vice President, 4D Technology, talks about how you can qualify and quantify your inspection callouts, defects, geometries of interest, and surface roughness with portable 3D optical surface...

Precision In Your Palm: 5 Reasons 3D Handheld Optical Gauges are Taking Over the Shop Floor
White Paper: Precision in Your Palm 5 Reasons 3D Handheld Optical Gauge are Taking Over the Shop Floor In the aerospace industry, precision is not optional. The quality and geometrical accuracy of components like turbine and compressor blades directly impact engine...