4 and 6 inch Models


   Other Fizeau 

   4-inch Horizontal
   Plano Interferometer

   Grazing Incidence

   How Phase Works


   Graham Product Line
   of Interferometers






Graham Optical Systems offers its HPS series of horizontal Phase Interferometers configured for Plano or Spherical work.   A 1/20 wave bayonet-mount transmission flat is standard equipment. For spherical work, appropriate transmission spheres are required and are available as accessories. 

All HPS interferometers also include remote control of  focus, zoom and intensity. Durango Universal Interferometry Software interacts with Graham's EndoPhazeTM system to achieve smooth phase -shifting with no hysteresis.  The software, Image Acquisition Board, and Data Acquisition Board are installed in a 3.02 GHz computer with an Intel Core i3-530 Processor.  A 23-inch TFT wide screen monitor is included.  Durango provides a wide selection of data outputs and colorful graphics and offers a live interferogram on the computer monitor so no separate video monitor is required. The operator can select the features that he wishes to display on the screen from among an assortment of graphics and data reports. Durango permits the QC manager to set the criteria for the pass/fail feature, thus permitting the routine measurement of test pieces by less skilled personnel. 

These rugged instruments are equally at home in the QC lab or in the optical fabrication shop. With excellent repeatability and reproducibility, this precision instrument provides the metrology required for all of your plano measurements

4-inch aperture (101.6 mm )
6-inch aperture (152.4 mm)
Select the Model that best suits your purpose 
1/20 wave fused silica reference surface High accuracy
Proprietary Optics for superior performance Highest contrast and cleanest interferogram of any interferometer available today.  No bull's-eye aliases!
Rugged construction High mechanical stability
A Turnkey System User Friendly and ready to go
Horizontal Orientation Easily accommodates either Plano or Spherical measurements
Two spot alignment For quick setup on each new part tested
Single Mode Diode Laser source (635 nm) Dithered for Sharp, speckle-free images
Zoom Optics Standard
Zoom, Focus, Iris, Intensity Remote Control Standard 
EndoPhazeTM for hysteresis-free phase shifting For smooth hysteresis-free phase shifting!
CCD Camera 768(H) x 494(V) pixels High resolution
Durango Universal Interferometry Software* 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
Pass/Fail Feature
Selection of colorful, printable reports
3.02 GHz computer with INTEL® Core™ i-3 540 processor For high speed data reduction and phase shift control
23-inch TFT Wide Screen Monitor For easy viewing
Live interferogram on computer monitor For quick inspection without extra video monitor
Tip/Tilt plate with bayonet mount for Transmission Flat or Transmission Sphere. Standard Equipment
Repeatability 1/300 wave ( <2 nm PV )     1/10,000 wave ( <0.1 nm rms)
Reproducibility Excellent
Data Acquisition time 30 milliseconds (typical) Fast
Data reduction time  ~3 seconds (typical) Fast
Footprint Model 4HPS (L x W x H) 20 x 14 x 8.5 in
Footprint Model 6HPS (L x W x H) 24 x 20 x 10 in.
Small footprint
Weight Model 4HPS  60 pounds
Weight Model 6HPS  75 pounds
Solidly built for high stability
Power 117 V 60 Hz 2 A (or 240 V 50 Hz 2A) Wired with plug to suit the customer's power source
Manual Illustrated Operator's Manual
NOW WITH 2-YEAR WARRANTY! New two-year limited warranty against defective components or workmanship. Extended warranty available.
Graham Optical Systems,  9530 Topanga Canyon Blvd., Chatsworth, California 91311

For Further Information today, call Gordon Graham today at (818) 700-1263  E-mail:  techinfo@grahamoptical.com
Copyright © 2013 Graham Optical Systems    All Rights Reserved    EndoPhazeTM is a trademark of Graham Optical Systems 
*Durango is a trademark of Diffraction International       This page last updated April 22, 2013