Han's Laser cutting machine 5 inches crescent Focus Lens (II-VI products) Applicable models: the full range of specifications: Lens Men 1.5 "Dia / 5" FL/.290 "ET_II-VI crescent by a convex lens and a concave Composition Using a small crescent-lens beam diameter can be output, and thus effectively at the time of cutting the beam to prevent the loss of astigmatism and spherical, at the same power output in the crescent mirror can lead cut holes get smaller when facing the lens mounting recess Under that focus on the role of cutting material, usually the price is higher than the flat crescent mirror convex mirror, but when cutting thin (3mm or less) faster cutting about 5% -8%. crescent lenses are widely used in Europe or European customers production of laser cutting machine.