PhaseCam Twyman-Green Infrared Interferometers

Compact, lightweight and vibration-insensitive for NIR, SWIR, MWIR and IR measurements.

High performance, quality and value, for accurate, repeatable measurement of surface shape and transmitted wavefront quality. 

IR Laser Interferometer - AccuFiz SWIR Fizeau Infrared  Interferometer

Measure infrared optics and systems at 1.064—10.6 micron wavelengths

PhaseCam Infrared Interferometers

PhaseCam Twyman-Green infrared interferometers accurately measure concave, convex and afocal infrared components, as well as infrared telescopes and lens systems.

PhaseCams incorporate Dynamic Interferometry® technology, using a single camera, high-speed optical phase sensor to acquire data thousands of times faster than a temporal phase shifting interferometer. Because acquisition time is so short, a PhaseCam IR interferometer can be used without vibration isolation in the most challenging environments.

Ultra-small and lightweight, with a fiber-coupled measurement head, a PhaseCam IR interferometer is incredibly easy to mount and position. PhaseCam systems are ideally suited for measuring infrared optics over long paths, for remote mounting in measurement towers or pressure vessels, and for other challenging test setups. Optional Dynamic mode lets you measure despite vibration and air turbulence, without an air table.

Vibration insensitive

30 microsecond data acquisition time

Comprehensive Product Line

Full line of alignment aids, mounts, divergers and more to ensure easy setup and optimal measurements in any environment

Reflectivity adjustment

A built-in rotating polarizer helps you achieve maximum fringe contrast and highest-quality data for any sample, from reflectivity <1% up to 100%

Accessory optics

Numerous accessories and options, a fully developed product line

4D PhaseCam systems have been deployed for measuring in the most challenging applications: in environmental and vacuum chambers; for long path measurements, without isolation; for with computer-generated holograms for aspheric and freeform optics testing; and as precision alignment aids for complex infrared sensing systems, among many others.

All 4D systems are backed by world-class support every step of the way. Upgrades, accessories and ongoing service will help you get the most of your interferometer investment. 

IR Laser Interferometer - PhaseCam NIR Twyman-Green Infrared  Interferometer

PhaseCam MWIR

Operating at
3.39 µm

IR Laser Interferometer - PhaseCam NIR Twyman-Green Infrared  Interferometer

PhaseCam NIR

Operating at 1.064 µm

IR Laser Interferometer - PhaseCam SWIR Twyman-Greenu Infrared Interferometer 1.55 micron

PhaseCam SWIR

Operating at
1.55 μm

What to expect

PhaseCam Twyman-Green infrared interferometers are available from 1064 nm through 3.39 μm.

PhaseCam Model Stabilized Laser Wavelength Camera
NIR Yes 1.064 µm 2000 x 2000
SWIR Yes 1.55 µm 512 x 512
MWIR Yes 3.39 µm 640 x 512

4D PhaseCam Twyman-Green IR interferometers are sold as turnkey systems:

  1. Rugged with 4D’s patented Dynamic Interferometry technology.
  2. Windows-10, Intel-chip computing system for rapid analysis and maximum security and longevity
  3. 64-bit software with advanced features such as real-time display of Zernike coefficients for rapid alignment operations
  4. Extended cable options  allow deployment in optical towers or other challenging locations

Accessories can include:

  • Optical mounts
  • A wide range of diverging lenses and beam compactors
  • Reference optics (flat or spheres).

4Sight™ wavefront analysis software, included with every PhaseCam, features excellent ease of use and a short learning curve. 2D and 3D displays, filtering, thresholds and masking tools make it easy to highlight surface shape and texture. Zernike, Seidel, geometric and diffraction analyses are easy to perform. Comprehensive data sharing capabilities let you read, write, save and print data in many common file formats for comparison between instruments. 


analysis software

Get In Touch

(520) 294-5600


3280 E Hemisphere Loop, 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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