Model 6339irVIS DUAL WAVELENGTH 3392 nM / 632.8 nM Interferometers by Graham Optical Systems

DUAL WAVELENGTH MODEL 6339irVIS
6-inch Aperture Fizeau Interferometer
Operates at 3392 nM and 632.8nM

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The 6-inch aperture Model 6339irVIS interferometer operates in two modes: Infrared or Visible -- selectable with a switch. The Model 6339irVIS is the 6-inch version of the Model 339irVis shown at the right. The instrument features a Zinc Selenide collimator and reference surface which is flat to 1/20 wave (measured at 632.8 nM). Two separate lasers are employed ( both Helium-Neon ) and are dithered to produce speckle-free live interferograms on the computer monitor.

The Model 339irVIS is quipped with two Cameras -- an Electrophysics broadband camera with a 320 x 240 focal plane array which produces the infrared interferogram while a standard CCD camera with 768 x 494 resolution is used for the 632.8 nM mode. This phase-shifting Fizeau interferometer utilizes piezo-electric phase shifters and Durango Universal Interferometry Software to permit the operator to achieve highly accurate and repeatable measurements at both infrared and visible wavelengths.

In typical usage of a Dual Wavelength Interferometer, the operator can align his optical system and perform any necessary tip/tilt operations with the interferometer in VISIBLE MODE -- greatly simplifying the procedure.

ADVANTAGES OF A DUAL WAVELENGTH INTERFEROMETER

While in the VISIBLE MODE, surface flatness measurements may be made at the higher accuracy 632.8 nM wavelength. The interferometer can then be put into the fully aligned IR MODE with the simple flip of a switch These interferometers are provided complete with Durango Universal Interferometry Software installed in a fully configured 3 GHz Computer with a 19-inch TFT flat screen monitor..

FEATURE BENEFIT

Dual Wavelength 3392 nM / 632.8 nM Alignment of two wavelength optical paths is coaxial

6-inch aperture Ideal for test pieces from 3/4 inch to 4 inches in diameter

Zinc Selenide Collimator / Reference Surface 1/100 wave at 3392 nM, 1/20 wave at 632.8 nM

Infrared Mode Camera Lens (3392 nM) 50 mm F/1.0 Zinc Selenide Lens with iris **See Option "B"

Visible Mode Camera Lens (632.8 nM) 4x Zoom

Configuration Fizeau Plano or Spherical Configurations
(Spherical work Requires Transmission Sphere -- not included)

Dithered Illumination High contrast, speckle-free interferograms

Zoom, Focus, Iris, Intensity and
Mode Select [ALIGN} [VIEW] Remote controlled

Infrared camera resolution 320 x 240 pixels

Alignment Mode Two Spot Alignment
for both Infrared and Visible Wavelengths

Visible camera resolution 768 x 494 pixels

Piezo-electric Phase Shifter under control of Durango Software The ultimate in phase shifting

Live interferogram Either infrared or visible interferogram computer monitor

Accuracy (uncalibrated) 1/100 wave at 3392 nM,
1/20 wave at 632.8 nM

Accuracy (calibrated) 1/250 wave at 3392 nM,
1/100 wave at 632.8 nM

Repeatability 1/300 wave PV, 1/1000 wave rms

Infrared Laser 3392 nM wavelength Internal 2.0 mW Laser *See Option "A"

Visible Laser 632.8 nM wavelength 1.0 mW

Dimensions (L x W x H) 35 x 22 x 10 Small footprint

Weight approx. 110 pounds (50 kg) Solidly built for stability

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

3 GHz computer
Data acquisition time 30 milliseconds (typical)
Data reduction time ~3 seconds Fast!

19-inch TFT Flat screen monitor For easy viewing

Power 115 / 249 Volts 60 / 50 Hz Wired with proper plug for user's power system

Test Beam Height 5.25 inches (13.3 cm)

Warmup time 30 minutes

OPTIONS DESCRIPTION

*Option ""A" Alternate Infrared Laser Replace 2mW infrared HeNe Laser
with external 8.0 mw HeNe Laser

** Option "B" (Infrared Camera Lens) Replace 50 mm Zinc Selenide Camera Lens
with 4X Zoom lens (50 mm to 200 mm)

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

This page last updated July 9, 2008