CO2 Focusing Lens, CO2 Laser Optics
SPT CO2 focusing lens adopts USA-imported CVD ZnSe, which features low absorption and is bale to bear higher laser energy density. The focusing lens is applied with abrasion-resistant anti-reflection (AR) coatings on both sides which provide maximum energy transmission and extremely low reflection.
There are a wide variety of AR coatings optional in the market for single, multiple or continuous wavelengths: single-layer, multi-layer and broadband coatings. The AR coating used in SPT CO2 focusing lens is designed especially for 10.6μm wavelength, with an energy transmission rate up to 99.8%.
SPT can provide a variety of economical focusing lenses to achieve the best result for laser heat treatment, welding, cutting and marking applications on any material compatible with laser processing. You can find a best fit focus lens at SPT according to your application requirements: laser power, type of material, detail level and resolution of the graphic (dpi), thickness of the material.
| Material ZnSe/GaAs | Surface finish: 20-10 scratch and dig |
| Wavelength: 10.6μm | Mechanical wedge: < 3' arc minutes |
| Focal length tolerance: ±1% | Effective aperture: >90% |
| Size tolerance: 0.0/-0.12mm | Bevel: < 0.2x45° |
| Thickness tolerance: ±0.2mm | Coating: R< 0.5% per surface @10.6μm |
| Surface accuracy: 4< λ/2per 1" Dia@632.8nm | |
| Model | Diameter (mm) | Focal length (mm) | Thickness (mm) | Material |
| SPT12.7-2.0-1.8 | 12.0 | 50.8 | 1.8 | PVDZnSe / GaAs |
| SPT14.5-1.5-1.8 | 14.5 | 38.1 | 1.8 | CVD ZnSe |
| SPT14.5-2.0-1.8 | 14.5 | 50.8 | 1.8 | CVD ZnSe |
| SPT15.26-1.5-1.8 | 15.26 | 38.1 | 1.8 | CVD ZnSe |
| SPT16.0-1.5-2.0 | 16.0 | 50.8 | 2.0 | CVD ZnSe |
| SPT16.0-2.0-2.0 | 16.0 | 50.8 | 2.0 | CVD ZnSe |
| SPT18.0-1.5-2.0 | 18.0 | 38.1 | 2.0 | CVD/PVD ZnSe |
| SPT18.0-2.0-2.0 | 18.0 | 50.8 | 2.0 | CVD/PVD ZnSe |
| SPT18.0-2.5-2.0 | 18.0 | 63.5 | 2.0 | CVD/PVD ZnSe |
| SPT18.0-3.0-2.0 | 18.0 | 76.2 | 2.0 | CVD/PVD ZnSe |
| SPT18.0-4.0-2.0 | 18.0 | 101.6 | 2.0 | CVD/PVD ZnSe |
| SPT19.05-1.5-2.0 | 19.05 | 38.1 | 2.0 | CVD/PVD ZnSe |
| SPT19.05-2.0-2.0 | 19.05 | 50.8 | 2.0 | CVD/PVD ZnSe |
| SPT19.05-2.5-2.0 | 19.05 | 63.5 | 2.0 | CVD/PVD ZnSe |
| SPT19.05-3.0-2.0 | 19.05 | 76.2 | 2.0 | CVD/PVD ZnSe |
| SPT19.05-4.0-2.0 | 19.05 | 101.6 | 2.0 | CVD/PVD ZnSe |
| SPT20.0-1.5-2.0 | 20.0 | 38.1 | 2.2 | CVD ZnSe/ GaAs |
| SPT20.0-2.0-2.0 | 20.0 | 50.8 | 2.2 | CVD ZnSe/ GaAs |
| SPT20.0-2.5-2.0 | 20.0 | 63.5 | 2.2 | CVD ZnSe/ GaAs |
| SPT20.0-3.0-2.0 | 20.0 | 76.2 | 2.5 | CVD ZnSe/ GaAs |
| SPT20.0-4.0-2.0 | 20.0 | 101.6 | 2.5 | CVD ZnSe/ GaAs |
| SPT1.0"-2.0-3.0 | 25.4 | 50.8 | 3.0 | CVD ZnSe |
| SPT1.0"-2.5-3.0 | 25.4 | 63.5 | 3.0 | CVD ZnSe |
| SPT1.0"-3.0-3.0 | 25.4 | 76.2 | 3.0 | CVD ZnSe |
| SPT1.0"-4.0-3.0 | 25.4 | 101.6 | 3.0 | CVD ZnSe |
| SPT1.0"-5.0-3.0 | 25.4 | 127.0 | 3.0 | CVD ZnSe |
| SPT1.1"-2.0-3.0 | 27.94 | 50.8 | 3.0 | CVD ZnSe |
| SPT1.1"-2.5-3.0 | 27.94 | 63.5 | 3.0 | CVD ZnSe |
| SPT1.1"-3.0-3.0 | 27.94 | 76.2 | 3.0 | CVD ZnSe |
| SPT1.1"-4.0-3.0 | 27.94 | 101.6 | 3.0 | CVD ZnSe |
| SPT1.1"-5.0-3.0 | 27.94 | 127.0 | 3.0 | CVD ZnSe |
| SPT1.5"-3-4.0 | 38.1 | 76.2 | 4.0 | CVD ZnSe |
| SPT1.5"-5-4.0 | 38.1 | 127.0 | 4.0 | CVD ZnSe |
| SPT 1.5"-7.5-4.0 | 38.1 | 190.5 | 4.0 | CVD ZnSe |
| SPT 1.5"-5-0.31" | 38.1 | 127.0 | 7.87 | CVD ZnSe |
| SPT1.5"-7.5-0.31" | 38.1 | 190.5 | 7.87 | CVD ZnSe |
| SPT 1.5"-5.0-0.35" | 38.1 | 127.0 |
