Other Infrared
  Interferometers

  Dual Wavelength 
  Interferometers

  Other Fizeau 
  Interferometers

  Grazing Incidence 
  Interferometers

  Why Grazing 
  Incidence?

  How Phase Works

  Graham Product Line

  Tutorials

  About Us
 
 

The Model 155ir is a 4-inch aperture Phase Fizeau interferometer with a fused silica collimator and a reference surface which is flat to 1/20 wave (measured at 632.8 nM). Operating at 1550 nM wavelength, the Laser Diode source together with our unique dithering system, produces a sharp, speckle-free image. 

The instrument may be configured for Plano or Spherical measurement (requires a transmission sphere -- not included).  Equipped with EndoPhaze^TM phase shifter, computer and Durango Universal Interferometry Software, this turnkey system offers provides a live interferogram on the computer monitor.
 

FEATURE	BENEFIT
4-inch aperture	Ideal for test pieces from 1/2 to 4 inch diameter
Fused silica reference surface 1/50 wave at 1550 nM	High accuracy
ZOOM Lens 4X	Readily accommodates test pieces from 1/2 inch to 4 inches diameter
Rugged construction	High mechanical stability
A Turnkey System	User Friendly and ready to go
Two spot alignment	For quick setup on each new part tested.
Dithered Laser source at 1550 nM	Sharp Speckle-free interferograms
Zoom, Focus, Iris, Intensity	Remote control for quick adjustments
EndoPhazeTM Phase shifter	Smooth operation with no hysteresis.
InGaAs Camera 320(H) x 256(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
2.2 GHz Computer with Intel Dial Core Processor Data acquisition Time 30 milliseconds (typical) Data reduction time  ~3 seconds (typical)	Fast!
19-inch TFT Flat Screen Monitor	For easy viewing
Live interferogram on computer monitor	For quick inspection with no extra video monitor
Reference surface an integral part of the interferometer and always aligned to collimated beam.	No need to purchase a separate Transmission Fat. No need to adjust Tip/Tilt of a Transmission Flat
Tip/Tilt Fixture available  With Bayonet mount for attachment of Transmission Sphere (Transmission Spheres not included)	Interferometer can accommodate either Plano of Spherical test Pieces
Accuracy (uncalibrated)	1/50 wave at 1550 nM,
Accuracy (calibrated)	1/240  wave at  1550 nM
Repeatability	1/300 wave PV,  1/1000 wave rms
Reproducibility	Excellent
Dimensions (L x W x H) 20 x 18 x 8 inches	Small Footprint
Weight 65 pounds (30 kg) approximately	Solidly built for high stability
Manual	Illustrated Operator's Manual
Power  117/240 Volts  50/60 Hz	Wired with proper plug for user's power system
Warranty	Standard one-year limited warranty against defective components or workmanship

For Further Information, Prices, Delivery call Gordon Graham today at 
(818) 700-1263 or send an email to the address below.

GRAHAM OPTICAL SYSTEMS,  9530 Topanga Canyon Blvd.,  Chatsworth, CA 91311

Phone (818) 700-1263    FAX   (818) 700-1627       E-mail: techinfo@grahamoptical.com

Copyright © 2008 Graham Optical Systems  All Rights Reserved
*Durango is a trademark of Diffraction International

This page last updated April 22, 2010