Dynamic interferometry, at the heart of all 4D products, overcomes many barriers to traditional, phase-shifting interferometry, such as moving parts, vibration, turbulence, etc. 4D has brought the power of dynamic laser interferometry to a wide range of applications, including large optics, general optics, data storage, optical storage pickup heads, and more.

General Optics Manufacturing Quality control for surface shape and texture, homogeneity for flats, spheres, prisms, transparent optics, etc.
Meter-Class Optics Shape measurement, polishing feedback and final approval for large terrestrial and space-based optics and systems.
Magnetic Data Storage Process control for disk and substrate flatness, surface quality, RVA analysis, waviness and more.
Pickup Heads (PUHs) Process control of wavefront quality for DVD, CD, Blu-ray and other pick-up heads.

More about 4D:
Choosing a 4D System

4D Technology continuously develops new systems that bring dynamic interferometry performance to production metrology, novel applications, and one-chance-only space hardware measurements.

4D's flagship PhaseCam series can be used for measuring plano optics up to ~45mm, spherical optics from millimeters to meters in diameter, and telescope assemblies with input apertures less than 45mm. The PhaseCam family includes IR, high-powered, and multi-wavelength versions for extended flexibility.
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3280 E Hemisphere Loop, Ste 146, Tucson, AZ 85706    Tel: +1 (520) 294-5600    Fax: +1 (520) 294-5601