Twyman-Green Options & Accessories
4D offers a broad array of digerging lens, beam expanders, mounts, cables and other options for our PhaseCam Twyman-Green laser Interferometers.
This highly stable stand provides accurate positioning in X, Y, Z, tip and tilt, for the PhaseCam 6010, 6110, NIR and SWIR.
This mounting plate lets you securely attach a PhaseCam 6010, 6110, NIR or SWIR to the 5-Axis stand or to your custom mounting hardware.
Our broad line of diverging optics match the radius of curvature of your concave test surface.
Diverging lenses at 633nm wavelength are available from EFL=9 mm through EFL=22mm, in quality of λ/5, λ/8 and λ/10 PVr.
Divergers are also available at other visible, NIR and IR wavelengths.
A beam expander matches the wavefront to the curvature of your convex test surface. 22.5mm and 45mm beam expanders are available for the PhaseCam 6010 and 6110, at 633nm wavelength.
100mm and 150 mm beam expanders are available for the PhaseCam MWIR.
Custom beam expanders are available for other sizes and wavelengths.
In some setups the test apparatus, optics or obstacles make it impossible to position the instrument close enough to the test optic to focus on it. A relay tube moves the focus range of the system away from the instrument. The standard relay tube length is 240 mm. Custom lengths are available. 633 nm wavelength only.
The image at left shows a combination relay tube and beam expander.
Cell-mounted reference spheres and flat mirrors enable system calibration to 0.05λ accuracy.
For visible wavelengths, spheres are available from NA=0.06 – 0.7, with either λ/10 or λ/20 PVr quality. Choose either high reflector and 4% uncoated spheres. λ/20 Reference mirrors are available in 25mm or 50mm diameter, as high reflectors or with 4% uncoated return.
For NIR and IR wavelengths, high reflector spheres with λ/10 PVr quality. λ/20 high reflector reference mirrors are available in 25mm or 50mm diameter.
Visible alignment lasers provide a visible beam that helps you align your PhaseCam NIR or SWIR setup. Note that the PhaseCam MWIR has a built-in visible alignment laser.
Extended cables make it possible to mount a PhaseCam in a remote location and control it from a distance. 10m and 20m kits are available for both the PhaseCam 6010 and PhaseCam 6110. Custom extended cable sets are available for other PhaseCam systems.