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4D technology

PhaseCam Twyman

- Green Laser Interferometers

PhaseCam dynamic Twyman-Green laser interferometers provide high resolution measurements despite vibration and air turbulence. PhaseCams capture full wavefront measurements in as little as 30 microseconds?5000 times faster than conventional phase shifting interferometers. Compact and lightweight, PhaseCams make reconfiguring test setups simple and easy, without vibration isolation.

The PhaseCam laser interferometer is perfect for metrology of large diameter optical components, production floor quality control, clean room applications typically hampered by air flow turbulence, environmental chambers where remote operation is essential, and modal analysis of  moving parts, such as deformable mirrors, spinning disks, or vibrating membranes.

PhaseCam laser interferometers are sold as turnkey systems, including installation, training, the latest computer hardware, and industry-leading 4Sight data analysis and visualization software.

PhaseCam 6010

Extremely compact, motorized controls for on-machine and remote operation

PhaseCam NIR

1.053, 1.064, 1.3 and
1.55 μm wavelengths

PhaseCam MW

Multi-wavelength for measuring tall steps

PhaseCam 6110 633nm

The smallest dynamic laser interferometer—for the biggest jobs.

PhaseCam IR

3.39 or 10.6 μm wavelengths

PhaseCam 4020HP

High power for measuring low reflectivity parts

PhaseCam Accessories

Divergers, beam expanders and other accessories for PhaseCam product

PhaseCam 4030

High-resolution with simple manual controls

PhaseCam 5030

Complete remote control, 1μs exposure time, 4 MP camera, 2X zoom


NanoCam Sq Dynamic Optical Profiler

The NanoCam Sq dynamic optical profiler measures surface roughness on supersmooth optics and precision surfaces. The non-contact NanoCam Sq replaces messy replication methods required with traditional workstation optical profilers and provides excellent portability.

By enabling on-machine roughness metrology the NanoCam Sq increases throughput and reduces the risk of damage to expensive, mission-critical optics.

NanoCam Sq measuring surface roughness of large mirror. Courtesy Optical Surface Technologies, Albuquerque, NM.

The NanoCam Sq optical profilometer utilizes Dynamic Interferometry®, incorporating a high-speed optical sensor that measures thousands of times faster than typical profilers. Because acquisition time is so short, the NanoCam Sq can measure despite vibration, making it possible to mount the instrument in polishing equipment, on a gantry or on a robot end effector. With this freedom of positioning the NanoCam can measure any location on the surface of a large optic, even in situ in polishing equipment.

Applications for the NanoCam Sq optical profiler include surface roughness of small and large coated/uncoated optics, on-machine surface roughness metrology, and process control for polishing operations.

The NanoCam Sq Dynamic Optical Profiler includes 4Sight™ advanced analysis software. Industry-leading 4Sight reports ISO 25178 surface roughness parameters (S parameters) and provides extensive 2D and 3D analysis options, data filtering, masking, database and import/export functions.

NanoCam Sq optical profiler with optional mobile workstation.


  • 3D Surface Roughness of Polished Optics

  • Large Optic Surface Profiling

  • On-Machine Surface Roughness Metrology

  • In Situ Polishing Process Control

NanoCam sq

AccuFiz Fizeau Laser Interferometers

AccuFiz® Fizeau laser interferometers offer an unmatched combination of performance, quality and value, for high accuracy shape measurement and transmitted wavefront quality measurements of optical surfaces, components and systems. With wavelengths from 532nm through 10.6 microns, and apertures from 100mm to 300mm, AccuFiz systems provide the right combination of features for a wide range of optical metrology applications.

AccuFiz 4 & 6-Inch

Compact, high performance laser interferometers

AccuFiz Large Aperture

12-Inch aperture (300mm aperture) for large flats

AccuFiz IR Interferometers 

Measure IR optics and systems at 1.55 microns (SWIR), 3.8 microns (MWIR) and 10.6 microns (LWIR)

Digital Radius Slide

For accuate Radius of Curvature Measurement

AccuFiz 6MP

 High resolution to measure aspheres and steep slopes

Optical Mounts 

For stable, repeatable test setups


FizCam Fizeau Laser Interferometers

FizCam Fizeau laser interferometers provide accurate, large aperture measurements even in challenging environments. FizCam laser intererometer systems capture full wavefront measurements in under 1 millisecond, enabling accurate measurement even in the presence of vibration and air turbulence. Their on-axis design eliminates the aberrations, software corrections and painstaking calibrations required with other Fizeau systems.

FizCam dynamic laser interferometers excel at general optics and large diameter optical component testing as well as analysis of moving parts. FizCam systems are equally at home in the lab or in noisy environments such as production floors and cleanrooms. Short and long coherence length options enable difficult measurements such as remote cavities, simultaneous measurement of multiple glass surfaces, or measurements in environmental testing chambers.

FizCam 2000 4 & 6-Inch

Short coherence for general optics, double-sided glass, remote cavities and more

FizCam 2000 12-Inch

12-Inch aperture for large flats

FizCam DUV

 Measure at 193nm to characterize deep ultra-violet (DUV) optics for lithography applications


PolarCam SnapShot Micropolarizer Cameras

PolarCam™ snapshot micropolarizer cameras capture images of multiple polarized angles from each video frame, enabling a range of image enhancement techniques and polarimetric measurements. Small, fast and field-proven, these unique cameras suppress or boost data content without image blur, for applications in image enhancement, medical imaging, remote sensing and more.

PolarCam CCD-based camera (left) and new CMOS-based model (right).

The PolarCam micropolarizer camera captures a snapshot image of multiple polarization angles from each video frame, without image blur. Compact, fast and field-proven, these unique cameras enable a range of image enhancement techniques and polarimetric measurements, for applications in process control, medical imaging, remote sensing and more.

Proprietary micropolarizer technology enables the PolarCam’s broad spectral response, wide angular bandwidth and high extinction ratio. The micropolarizer array is bonded directly to the sensor and includes no moving parts, providing a fully solid state, Division of Focal Plane (DoFP) configuration.

High-resolution PolarCam cameras are available with 0.29, 1.4, 1.8 and 3.8 mega-pixel sensors. The video rate of up to 259 full frames per second ensures fast capture of quickly changing scenes. The new CMOS high speed PolarCam can even provide up to 170 frames/second at its full 1248 x 1082 resolution. Using customizable regions of interest the CMOS cameras provide frame rates in the kilohertz range.

Optional PolarView software provides real-time display and calculation of key polarization parameters, including Degree of Linear Polarization (DoLP), Angle of Linear Polarization (AoLP), linear Stokes parameters (S0, S1 and S2) and more. Use the many included tools to process and analyze the data, then save images and movies of each parameter for comprehensive analysis.

PolarCam map of birefringence in an optic due to stress induced by a 3-point mounting fixture. Average Intensity is shown on the left; the Polarization Enhanced image is shown on the right.

An optional high speed computer system maximizes camera performance. 4D Technology can also provide complete illumination and imaging solutions based on the PolarCam. Contact 4D for more on custom imaging and sensing solutions.

PolarCam is available as an OEM camera or as part of a complete testing system. Shown here is the PolarCam Birefringence Testing Station.


  • Image Enhancement

  • Glare Reduction

  • Haze Removal

  • Birefringence Measurement

  • Industrial Monitoring

  • Polarization Microscopy

  • Stress and Strain Characterization

  • 3D Reconstruction

  • Medical Imaging Enhancement

  • Autonomous Vehicle Vision

Parsed pixelated camera polarization images are shown on the left. On the right, the contrast of the sky and trees in the background is reduced while the contrast of the two cars in the foreground is dramatically increased.



Roughness and Defect Measurement

The FlexCam is a compact, high resolution 3D metrology module for in situ roll-to-roll measurement of substrates, barrier films and intermediate layers. FlexCam modules provide sub-nanometer vertical resolution and micrometer-scale lateral resolution for in-process roughness and defect quantification.

Surface roughness and defects affect the longevity of components deposited on substrates. FlexCam enables real-time monitoring and control of roughness to less than 0.5nm rms, both inclusive of and exclusive of defects on the film. The system provides accurate measurement despite runout, web flutter, and other effects which can vary the relative location of the substrate with respect to the measurement system. No other system can match its performance.

FlexCam also identifies and quantifies defects, registering their position within the roll. Multiple defect statistics are calculated including area, volume, depth and slope, with user-selectable pass/fail criteria as each metric can have adverse effects on barrier or end device performance. Extrinsic versus intrinsic defects can be discriminated to help isolate their root cause. Where bright-field inspection systems are sensitive to the backside of the film as well as the roller surface, 4D’s FlexCam is immune to such effects, measuring only the top surface.

Every FlexCam module provides thousands of times more areal coverage than off-line bright-field or 3D microscopes. Each FlexCam module can provide 100% inspection in the machine direction for web speeds up to 1 m/minute. In addition, FlexCam modules can be arrayed across a web, offering as little or as much sampling in the transverse direction as required.

Each module processes all data on-board, calculating and reporting statistics in real-time, for incredible processing speed. In production mode, simple controls and pass/fail criteria make it easy to monitor the process. In engineering mode, 2D analyses, statistics and visualization tools help you quickly dial in process parameters and examine individual defects with high fidelity.


4Sight Data Analysis Software

4Sight™ interferometric data analysis software sets the standard for easy analysis of data from laser interferometers and surface roughness profilers. 4Sight is designed with features that make life easy: a Microsoft Windows® interface, open data file format, extensive 2D and 3D displays, filtering, data masking, fiducial alignment, diffraction analysis and much more. With simple data exchange capability you can read and analyze data from almost any data analysis software. You can even make an analyze movies of samples as they change or move.

4Sight™ functions with virtually any phase shifting interferometer, as a stand alone workstation, and with all 4D dynamic laser interferometers and surface roughness profilometers. It gives you incredible analysis power, and a short learning curve.

- "Best software in the industry."  Michael Greenberg, Raydiance, Inc.





Data Sharing

4Sight Software


Quantitative Phase Microscope

The BioCam Quantitative Phase Microscope lets you measure cell motion and dynamics at video rates within and among live cells.

Dynamic Interferometry® provides fast acquisition that enables cell imaging in real time, at video rates, to track cellular motion and changes in cell volume. The method offers sharper cell imaging, faster acquisition and faster analysis time than other methods such as digital holography.

This video shows the blood flow in the cardinal (axial) vein of a 3-day old anesthetized zebrafish (Danio rerio). The video was created using the BioCam Quantitative Phase Microscope with 511nm LED source, 20X magnification, and 33 x 44 micron field of view.

The BioCam uses low light levels to avoid phototoxicity and does not require contrast agents, enabling researchers to measure the volume, optical thickness and dry cell mass of live cells and to follow motion and processes over time. This data provides valuable information to researchers studying cellular dynamics, motility, and cell and tissue morphology.

Paramecium interacting with a particle at 45X. Note cilia. The optical thickness ranges from -130 to 460 nm.


  • Label-free live cell imaging

  • Monitor processes over time

  • Quantify cell motion and motility

  • Quantify volumetric changes

  • Determine mechanistic properties

  • Monitor and quantify cell growth

  • Measure response to drug or stimulus


4D Custom Solutions

4D Technology has driven recent major advances in interferometry including polarization-based phase shifting, short coherence laser interferometry, vibration-insensitive speckle interferometry and many others.

4D's custom interferometers and other custom metrology solutions let you tap the creativity and expertise of our team to solve your metrology challenges. 4D custom interferometers and laser interferometers overcome difficult environments, complex setups and one-of-a-kind measurement problems, at wavelengths from DUV through IR.

4D also provides the service and support to ensure that our custom systems give you the same reliability you expect from 4D products.

Contact 4D for a prompt response to your custom measurement needs.

“The 4D Technology interferometer has enabled us to make measurements that were not previously possible, including measurements that are crucial to the success of the James Webb Space Telescope Project. The 4D system has exceeded our expectations.” -Babak Saif, Space Telescope Science Institute

Custom Solutions

4D Laser Interferometer Upgrade Kits for WYKO, Zygo, MiniFIZ, Buccini and More.

4D Technology provides cost effective upgrade kits to refurbish and enhance older temporal phase shifting laser interferometer systems. 4D’s extensive optical metrology experience and hands-on expertise with these systems offers owners an outstanding source of support for extending the life of older systems.

4D laser interferometer upgrades begin by increasing computer power for overall system reliability. 4Sight, 4D’s powerful wavefront analysis software, provides comprehensive analysis, filtering, visualization and output tools, making older systems more powerful than ever.

A standard upgrade kit includes a new, high-speed computer system, framegrabber and ADC boards, 4Sight software and detailed user manuals. The self-installation upgrade is designed for easy setup. Custom factory upgrades can include repairs and or replacement parts such as PZT drivers, new lasers and other hardware.

4Sight upgrade kits are available for MiniFIZ models from ADE Phase Shift®, and interferometer systems from Buccini, WYKO®, Bruker, and Zygo®.


Optical Mounts

4D optical mount components for laser interferometers reduce setup time and improve both productivity and measurement quality. Rigid and vibration-resistant, these easy-to-use mounts interface with most manufacturers' optics. Available in both 4-inch and 6-inch versions to accommodate most Fizeau laser interferometers, including 4D AccuFiz compact Fizeau Interferometers and FizCam Dynamic Interferometers.



Use the optical mount Configuration Guide to determine the components required for particular applications.


2-Axis Base

3-Axis Base

5-Axis Base

Tip-Tilt Adapter

Shelf Mount

Rotation Adapter

Adapter Plate

3-Jaw Mount

6" to 4" Bayonet Adapter

Bayonet Mount

Pellicle Beamsplitter

Table Guide

Look-Down Stand

Transmission and Return optics


  • Optics Testing

  • Flats

  • Wedge

  • Homogeneity

  • Transmitted Wavefront

  • Prisms

  • Corner Cubes

Optical Mounts

4D Service Contracts and Warranties

4D Technology’s products are rigorously tested to ensure years of quality service. All 4D products are warranted for one year against defects in material and workmanship. The 4D warranty covers parts and labor, including field service if applicable.

At the time of system purchase, for added protection you can choose to extend the basic warranty for up to 3 additional years.

Alternately, one of three tiers of Service Contracts can be selected to supplement the original warranty, extend the period of coverage and provide additional support. These Service Contracts are available at a range of pricing and can be purchased at any time up to five years after factory shipment. The Platinum Contract offers the highest level of benefits including preventive maintenance and calibration.

Service Contracts
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