Model 4HPS Phase Interferometer


  Vertical Fizeau 


  Dual Wavelength

  Grazing Incidence

  Phase Tutorial



This 4-inch aperture Horizontal Phase Interferometer is equipped with a tip/tilt plate with industry standard bayonet mount which accepts either a transmission flat for plano work or an appropriate transmission sphere for measurement of spherical surfaces.

A standard 4% reflectance transmission flat is standard equipment with the Model 4HPS.  Transmission spheres are available as accessories.

Compact and sturdy, this rugged instrument is equally at home in the QC lab or in the optical fabrication shop. Provided with a remote control of Focus, Zoom, Intensity, the 4HPS is user-friendly in any environment. 

4-inch aperture (101.6 mm) Ideal for test pieces from 1/2 inch to 4 inches diameter
Fused silica collimator and fold mirrors High quality optics thoughout
Proprietary optical system, for superior performance Highest contrast and cleanest interferogram of any interferometer available today. No bull'seye aliases!
Rugged construction High mechanical stability
A Turnkey System User Friendly and ready to go
Horizontal Orientation Easy to use for Plano or Spherical work
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 (6X) Readily accommodates test pieces from 1/2 inch to 4 inches diameter
Zoom, Focus, Iris, Intensity Remote Control for quick adjustments
EndoPhazeTM For smooth, hysteresis-free phase shifting
CCD Camera 768(H) x 494(V) pixels High resolution
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
2.2 GHz All-in-One Computer for smaller footprint For high speed data reduction and phase shift control
Live interferogram on computer For quick inspection with no extra video monitor
4% reflectance Transmission Flat  Included as standard equipment
Tip/Tilt Plate with industry standard Bayonet mount for attachment of Transmission Spheres. (Transmission Spheres sold separately) For quick attachment of Transmission Flats or Spheres
Repeatability 1/300 wave PV   1/1000 wave rms
Reproducibility Excellent
Data Acquisition time 30 milliseconds (typical) Fast !
Data reduction time 3 seconds (typical) Fast !
Dimensions (L x W x H) 20 x 14 x 8.5 inches Small footprint
Weight 60 pounds Solidly built
Power 117 V 60 Hz 2 A (or 240 V 50 Hz 2A) Wired with plug to suit the user's power source
Manual Illustrated Operator's Manual
NOW WITH 2-YEAR WARRANTY Two-year limited warranty against defective components or workmanship
Accessories available Transmission Flats with various surface reflectivities
Transmission Spheres
Tip/tilt mounts for test piece alignment
Graham Optical Systems 9530 Topanga Canyon Blvd., Chatsworth California 81311
For further information please call Gordon Graham at (818) 700-1263    E-mail
  *Durango is a Trademark of Diffraction International       **Windows is a trademark of Microsoft
Copyright © 2014 Graham Optical Systems  All Rights  Reserved
This page last updated February 18, 2014