Helen

 The focusing lens is the last optical device in the laser path, before it hits the part. Its primary role is to focus the laser beam to a specific focal length (FL) - depending on the application. Therefore, the focal length - determined by the radius and curvature of the lens - is its most important feature. Focusing lenses are usually made of zinc selenide (ZnSe) using an anti-reflective coating. The focusing lens is either a plano-convex lens or a curved moon lens. Focusing lenses are an integral part of the laser machine, and diameter, focal length, and coating are the core factors in selecting the raw material for the focusing lens. Laser focusing lenses  are used to focus the collimated light from the laser beam in a variety of laser applications. Laser lenses include a variety of optical lens types, including PCX lenses, aspheric lenses, cylindrical lenses, or laser generator lenses. Laser lenses are designed to focus light in many different ways depending on the lens ...