The IR LUPI (Laser Unequal Path Interferometer) operates at a wavelength of 3.39 micrometers and features an internal He-Ne IR laser as well as an integral collinear visible alignment laser. The IR LUPI is the ideal instrument for testing mid-wave infrared imaging systems of any size or complexity.
State-of-the-Art Resolution and Accuracy
- Includes a 640×512 pixel high-resolution cooled InSb camera
- Features Diffraction International’s Durango™ fringe analysis software
- System accuracy specified as 0.008 λ RMS @ 3.39µm, with repeatability of 0.001 λ RMS (Static Fringe Analysis)
Designed to Maximize Your Productivity
- Integrated aperture zoom, focus, and panning provide optimized viewing of the fringe pattern
- Optional objective lenses convert the output to a diverging beam for testing cameras, lenses, and other imaging systems
- An optional Translation Base provides extended 3-axis positioning travel offering unprecedented positioning flexibility
- Internal reference mirror features selectable effective reflectivity values of 90%, 40%, and 4% to match the optics under test, available at the turn of a knob
| Specification Description | Design Value |
|---|---|
| Accuracy | 0.008 λ RMSWavefront Error (WFE) @ 3.39µm for System Mainframe |
| Repeatability with Static Fringe Analysis | 0.001 λ RMS 1s @3.39µm |
| Repeatability with Phase-Shifting Fringe Analysis | 0.0003 λ RMS 1s @3.39µm |
| Output Aperture Size with ExtensionTubes and ± 3mm Panning Range | 25mm diameter |
| Output Aperture Size, maximum | 32mm diameter |
| Spatial Sampling | 640 x 512 pixels |
| Acquisition Mode | Static Fringe Analysis standard; Phase Shifting optional |
| Interferometer Laser Specifications | |
| LaserType | HeNe |
| Wavelength | 3.39µm |
| Output Power | ≥ 4mW |
| Beam Polarization | Linear |
| Alignment Laser Specifications | LaserType | HeNe |
| Wavelength | 0.6328µm |
| Output Power | ≥ 5mW |
| Beam Polarization | Linear |
| Mainframe | |
| Envelope Dimensions (LWH) | 1500mm x 470mm x 645mm |
| System Optical Axis Height | 318mm @ lowest position 641mm @ highest position |
| Translation (with optionalTranslation Base) | |
| Along Optical Axis, coarse | Infinite coarse positioning |
| Along Optical Axis, fine | ± 38mm via leadscrew |
| Perpendicular to Optical Axis, coarse | Infinite coarse positioning |
| Perpendicular to Optical Axis, fine | ± 25mm via leadscrew |
| Vertical, fine | 323mm total, via leadscrew |
| Electrical Requirements | 120VAC, 60Hz |
| Laser Safety | CDRH Class IIIb Laser Product IEC Class 3B |
| Weight | 175lbs (Mainframe alone) 350lbs (with optional Translation Base) |
| Software | |
| Interferometry Software | Diffraction International Durango |
