Custom dynamic Twyman-Green  interferometers

Need NIR or SWIR, multi-wave, high power, or zoom?

With super-fast acquisition speeds to as low as 30 microseconds and robust acquisition and analysis software, PhaseCam Twyman-Green interferometers are a superb platform to build a customized metrology instrument on. As a metrology company with a custom engineering group, we’re obsessed with solving problems for your applications.

PhaseCam Customizations Description

The PhaseCam® 6000 is an extremely compact and lightweight dynamic laser interferometer for measurement of optics and optical systems. With an easy-to-position, fiber-coupled measurement head and motorized controls, the PhaseCam 6000 is ideal for measuring large, focal optical systems such as concave telescope mirrors and lens systems, as well as small-aperture, afocal components such as flat mirrors and collimators.

The PhaseCam 6000 incorporates Dynamic Interferometry® technology, using a single camera, high-speed optical phase sensor to make wavefront measurements in less than 30 microseconds— over 5000 times faster than a temporal phase shifting interferometer. Because acquisition time is so short, the PhaseCam can be used without vibration isolation or turbulence control, making it ideally suited for use in situ on production equipment, in clean rooms and in environmental test chambers.

Vibration insensitive

30 microsecond data acquisition time

Complete system

Includes all you need to take and analyse measurements

Reflectivity Adjustment

Easily adjust for surfaces with reflectivity from  1% to 100%

Accessory optics

Numerous accessories and options, a fully developed product line.

PhaseCam Twyman-Green Laser Interferometer
PhaseCam ESPI Twyman-Green Laser Interferometer
PhaseCam Twyman-Green Laser Interferometer

What to expect

Operating with HeNe (632.8 nm), or 1053 nm or 1064 nm infra-red lasers (and some custom wavelengths,) PhaseCam is a small aperture surface measuring and wavefront transmission measuring interferometer for measuring optics in their functional wavelength.

With super-fast acquisition times, it’s ideal for long optical-path measurement of large focal systems, as well as deformable mirrors and adaptive optics. It’s highly popular in measuring concave telescopes mirrors and lens systems. It’s also great for testing small aperture afocal components like flat mirrors and collimators.

  • Meter-class telescopes
  • Quality verification of optical components
  • Vacuum and environmental chamber tests
  • Production floor quality control

Download the PhaseCam 6100 633 nm Specifications Sheet


Download the PhaseCam 6100 SWIR (1550 nm) Specifications Sheet

4D supplies a turnkey interferometric system:

  1. Interferometer Mainframe
  2. Advanced software for taking measurements and analyzing the results
  3. Complete computer system
  4. Connecting cables and power supplies

Accessories include:

  • Multi-axis mounting and aligning the mainframe
  • Optical mounts
  • Reference optics
  • Diverging lenses for varying the beam shape
  • ESPI accessory for 

4Sight wavefront analysis software features a user-friendly interface with unmatched simplicity, analysis features and graphical displays. 

The measurement functions assist in alignment and measurement execution, and set-up of masking, reference subtraction, terms removal, and similar matters. 

Data analysis functions such as Zernike, Seidel, geometric and diffraction analysis are easy to perform. 

Share your data across many analysis applications, such as MatLab and CodeV. 

Highlighted Features

Compact and Lightweight

Designed with performance and remote measurement in mind. The small, lightweight mainframe is easy to mount, easy to move, and requires less support structure.



Because the light efficiency of the system, it’s possible to measure surfaces with reflectivity from 1% to 100%.


With acquisition speeds as fast as 30 microseconds, PhaseCam is over 5000 times faster than a temporal phase shifting interferometer, stopping vibration blur in its tracks.


analysis software

PhaseCam and telescope optics

Check out our application page on telescope optics.

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Get a quote, or advice on your application.

Other PhaseCams

PhaseCam 6100 Twyman-Green Interferometer

PhaseCam 6100

Fiber coupled, high resolution and easy to position. Great for large optics.

PhaseCam Twyman-Green Infrared Interferometer

PhaseCam Infrared

Wavelengths from 1053 nm – 3.39 um for testing IR optics.

PhaseCam Multi-wave Laser Interferometer

PhaseCam 4000MW

Uses multiple wavelengths to measure large steps.

PhaseCam Twyman-Green Vacuum Caompatible Laser Interferometer

Vacuum compatible

Measures in a vacuum chamber.

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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