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Fizeau Continuous Zoom Interferometer

A Fizeau Interferometer that has continuous OPTICAL zoom breakthrough. They said it couldn’t be done, but here’s a quick demonstration of the 4D Technology Accufiz with zoom option.


  • use one interferometer for different sizes of optics
  • get more spatial resolution
  • examine detail better
  • use full pixel array to get higher slope tolerance

This unique Fizeau uses optical (and optional digital zoom). Measured performance shows no imaging degradation from 1x to 3x.

Measure more optics, see better. See with 4D.

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Looking for help with a particular measurement? Tell us about it. Our Applications Engineers are happy to help.

Products for Aspheric Optics

AccuFiz 6 MPx

The high resolution 6 megapixel AccuFiz Fizeau interferometer can measure steeper slopes, making it your best suited option for working with aspheres.


4D PhaseCam Twyman-Green interferometers are the industry choice for measuring concave spherical optics, from several millimeters to tens of meters in diameter.

Do you need custom-built metrology?

Get a free consultation. 4D Technology’s mechanical, optical, electrical and software engineering teams are standing by to evaluate what it would take to meet your application’s requirements.

Get In Touch

(520) 294-5600


3280 E Hemisphere Loop Rd, Ste 146
Tucson, AZ 85706


Office Hours (Arizona Time)

Mon: 8am – 5pm
Tue: 8am – 5pm
Wed: 8am – 5pm
Thur: 8am – 5pm
Fri: 8am – 5pm
Sat: Closed
Sun: Closed

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