Our CO2 laser windows are made from Laser Grade ZnSe and coated with low absorbing and low reflectance coatings. Windows from other materials such as Germanium, Silicon, Zinc Sulphide (ZnS) can also be made and coated for other wavelengths.
Dimensional tolerances for standard lenses, windows and mirrors are as follows:
Diameter: +0/-0.1 mm for most diameters, +0/-0.05 mm for 1.5″ lenses
Centre thickness: +/-0.1 mm
Edge thickness variation: most lenses within 0.03 mm and some within 0.05 mm
Focal length: +/-0.5%. Some long focal singlet scanning lenses can be 1 to 2% due to highly meniscus shape
Surface form: typically less than 1 visible fringe on a 38 mm diameter test area
Surface roughness: within 20 Å rms
Tighter tolerances are possible on custom optics. Sometimes they are interrelated if very tight, e.g. the achievable flatness on a window can depend on the thickness (rigidity).
ULO Optics is an ISO certified company and quality is at the heart of everything we do. With a host of industrial affiliations you can rely on ULO to deliver.
Beam Expanders for 1μm lasers
ULO Optics are excited to introduce our new range of beamexpanders. Designed for low power (500w) lasers such as Nd:YAG and Yb doped fibre lasers operating near the 1μm wavelength. The beamexpanders are of Galillean design and use Multi-spectral Zinc Sulphide for the optics which has an absorption at 1μm of 0.0005cm−1 (Similar to ZnSe at 10.6μm).
ULO Mirror Blocks
Designed to provide easy alignment and low maintenance, our mirror blocks are supplied pre-aligned to a 45º angle of incidence to within ±1 arc minute read more
ULO Optics develops CO2 Brewster plate beamcombiner
In our new beamcombiner – C-BC-2, pairs of enhanced Brewster Windows are used to attenuate a linearly polarised CO2 laser beam. The Brewster plate acts like a polarising beamsplitter. The difference in reflectance also allows two perpendicular polarised beams to be combined into a single beam.