Model 6339ir 6-inch Aperture
Infrared Fizeau Interferometer


Other Infrared Interferometers

Dual Wavelength Interferometers

Other Fizeau 

Grazing Incidence Interferometers

How Phase Works



The Model 6339ir is the 6-inch version of the Model 339ir Interferometer shown at the left. By utilizing a unique design developed by Graham Optical Systems, costs have been curtailed while maintaining the highest quality of performance. The collimator and reference surface are integral to the interferometer resulting in improved infrared throughput while eliminating additional costly components. Fabricated from optical grade silicon, the reference surface is flat to 1/10 wave measured at 632.8 nM (better than 1/50 wave at 3392 nM).  An internal Helium Neon laser provides the Model 6339ir with a safe and stable source of 3.392 micron radiation to produce a high contrast, speckle-free interferogram. This turnkey instrument requires no additional Transmission flat for Plano work. Two infrared camera options are offered: Low Resolution 320x256 pixels and High Resolution 640x512 pixels.
Aperture  6-inches (152.4 mm)
Infrared Laser 2.0 mW Helium-Neon Laser at 3392 nM wavelength
Infrared Camera Lens (3392 nM) * 100 mm F/1.0 Zinc Selenide Lens with iris
1/50 wave reference surface No additional Transmission Flat required
Alignment Mode Two Spot Alignment 
Collimator / Reference Surface  Optical Grade Silicon
Configuration Fizeau Plano Configurations
Intensity Adjustment Remote control
Image brightness and contrast controls Accessible from rear surface of interferometer
Live Fringes on Computer Monitor High contrast speckle-free image
Two IR camera Options: Low and High Resolution 320x256 pixels or  640x512 pixels
Phase Shifter Piezo-electric under control of Durango Software.
Accuracy (uncalibrated) 150 wave at 3392 nM
Accuracy (calibrated) 1/250 wave at 3392 nM
Repeatability 1/300 wave PV, 1/1000 wave rms
Dimensions (L x W x H) 35.0 x 22 x 9.7 inches  (88.9 x 55.9 x 24.6 cm)
Computer and 23-inch Monitor Included 2.93 GHz computer with INTEL i3-530 processor
Weight 95 pounds 43 kg)
Durango Universal Interferometry Software Data Acquisition and measurement process under Durango control
Windows environment
PV and rms in users choice of units
High level of repeatability
Excellent reproducibility
Large choice of graphic displays
Dynamic Sections
3-D OPD Plot
Reference Subtraction
MTF and PSF graphics and plots
Zernike Polynomials available for all measurements
Seidel Coefficients available
Data Acquisition Time 30 milliseconds (typical)
Data Reduction Time <3 seconds (typical)
Test Beam Height 5.35 inches ( 13.3 cm)
Warmup Time  30 minutes

For Further Information, call Gordon Graham today at (818) 700-1263  E-Mail:
Graham Optical Systems,   9530 Topanga Canyon Blvd.,   Chatsworth, CA 91311
Copyright © 2013 Graham Optical Systems All Rights Reserved  *Durango is a trademark of Diffraction International 
This page last updated April 22, 2013