MCWlaser ZnSe Lens for Co2 Laser Engraver Cutter 40W 50W 60W 80W 100W D: 18mm FL: 1″ 25.4mm, 1.5″ 38.1mm, 2″ 50.8mm, 2.5″ 63.5mm, 3″ 76.2mm, 4″ 101.6mm

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”
Edge thickness variation (ETV): <= 0.002''
Transmittance: 99.5%
AR Coating Reflectivity < 0.3%
Wavelength: 10.6 um
Aperture: 90% of the Diameter
Focal Length Tolerance: +2% / -2%
Clear Aperture (Polished) > 90%
Face accuracy (radial deviation / irregularity) at 0.63um: <= 0.20%
AR Coating Reflectivity Per surface at 10.6 microns :<= 0.20%

Application:
Please check the listing pic

Packages List:
Znse focus lens x 1pcs

Shipping Time:
Standard shipping 7-12 working days from China to USA by USPS
Expedited Shipping 4-5 working days from China to USA by DHL/UPS
Znse coating 10600nm
Edge Thickness: 2.5mm
Diameter: 18mm,Focal length: 1″ 25.4mm
Work perfect with 30W -100W CO2 laser engraver cutter.