High Quality ZnSe Material. Excellent Optical Properties. Plano convex shape (Convex-concave)/Meniscus (Convex-concave) lens for better quality when engraving.
Superb Coating Process: Double-sided Solid Coating. Wiping Resistance. Long Working Life.
High Precision Process: Excellent Substrate. Precision Slicing, Polishing, Grinding Processes. High Temperature, Laser Resistance.
High Transmittance: High Quality Material and Exquisite Coating. Reduce the Loss of Laser. Higher Work Efficiency.
Diameter: 20mm(0.79 inch), Focal length:1"/25.4mm, 1.5"/38.1mm, 2"/50.8mm, 2.5"/63.5mm, 3"/75mm, 4"/101.6mm, 5"/127mm, 7.5"/190.5mm, Thickness: approximate 2.2mm (0.09 inch)