20mm CVD ZnSe Focal Focus Lens for Laser Engraver Cutter

Compatible Machines: AF2440;AF4063;AF3555;AF5070;ZF3551 Cutting Edge Features: HIGH-QUALITY CVD ZnSe: OMTech's powerful focus lenses are manufactured from premium zinc selenium via chemical vapor deposition for superior optical properties. HIGH TRANSMITTANCE: Both sides of each lens are covered with strongly antireflective coatings to achieve at least 99.5% transmittance rate for infrared light at a wavelength of 10.6 microns. LASTING DURABILITY: Our laser engraver focus lenses' double-sided coating process also ensures outstanding scratch resistance for longer service life. WIDE COMPATIBILITY: This 20mm laser focus lens fits OMTech 100W-130W CO2 laser engravers. Please check the focal lens diameter in your machine’s manual before purchasing. EASY TO USE: The plano-convex shape of OMTech's engraver focal lens lets you install it easily and correctly onto your machine in the proper orientation. Detailed cleaning instructions also help you take proper care of your lens. Speci