[ Range of applications] The CVD Znse 20 mm holographic focus lens can be used in a 30W-200W CO2 holographic engraving and cutting machine to obtain more creativity and a more precise production. [High quality]: The 20 mm holographic CO2 lens is made of CVD Znse material, polishing and grinding process, resistance to high temperatures, rate of holographic transition up to 99.9%, reducing the loss of holographic and excellent optics. Performance A very good CO2 holographic lens []: The 20 mm holographic lens is designed with a solid double-sided coating, which is scratch , , and ensures excellent scratch resistance. [Product parameters] Diameter: 20 mm/0.79 inches; length: 50.8 mm/2 inches; Thickness: 2 mm/0.07 inches; Shape: . The holographic lens is suitable for the holographic wavelength = 10.6 um.