lens with focus 2inch 2.5inch 3 inch 4inch
1. Diameter : 18mm, 20mm, 25mm, 30mm
2. Focal length :50.8mm/2"
3. Thickness : 2mm
4. Material : Imported USA CVD ZnSe
5. Structure : Meniscus lenses(wavelength 10.6um)
6. Usage : Apply for co2 laser cutting and engraving
7. ZnSe lenses can be provided as a generated blank, polished optic and/or coated to your requirements.
Lens specification:
Model |
20mm laser focus lens |
Diameter |
18mm 20mm 25mm 30mm |
Focus Length |
38.1mm |
50.8mm |
63.5mm |
76mm |
101mm |
Diameter Tolerance |
+0/-0.13mm |
Thickness Tolerance |
±0.25mm |
FL Tolerance |
<±2% |
Centration |
<3 arc minutes |
Clear Aperture |
>90% |
Surface Figure |
<λ/2 per 1"Dia(@)632.8nm |
Surface Quality |
40-20 scratch and dig |
AR/AR coating |
R<0.5% per surface (@) 10.6um |
Contacts details: