Material: Hight quality PVD Znse crystal material Diameter:19mm/0.75";Focal Length:50.8mm/2";Thickness:2.2-2.3mm;Transmittance: ≥99.11% Double-sided solid coating,Wiping resistant,Extended durability,Precision slicing polishing and grinding processes,High temperature laser resistance,Excellent optical properties,High working efficiency. It's good for 40W/50W/80W/100W/130W/150W CO2 laser 10600nm It can be used for CO2 laser engraving and cutting well. Features:
Material: Znse
Lens Type: plano-convex (3'' and 4'') or meniscus (1'', 2'', 2.5'' and 5'')
Edge Thickness: approximate 2.3mm for diameter 12mm/15mm/18mm/19mm/20mm;
approximate 3mm for diameter 25.4mm
Tolerance of Thickness: 0.010''
Transmittance: 99.5%
Wavelength: 10.6 um
Aperture: 90% of the Diameter
Focal Length Tolerance: +2% / -2%

Application:
Please check the listing pic

Packages List:
Znse focus lens x 1pcs