Method for marking or labelling a workpiece

摘要

The method comprises arranging a polymer matrix (7) on a workpiece (3) in such a way that a laser beam (1) passes to the workpiece and a light diffusion surface (9) of the workpiece before it arrives on a polymer matrix. The material of the workpiece is transparent for radiation wavelength. The light diffusion surface of the workpiece is wetted with a fluid or viscoelastic medium (11), which has a similar refractive index like the materials of the workpiece. The light diffusion surface is wetted with the fluid or viscoelastic medium with a layer thickness of 250 nm to 10 mm. The method comprises arranging a polymer matrix (7) on a workpiece (3) in such a way that a laser beam (1) passes to the workpiece and a light diffusion surface (9) of the workpiece before it arrives on a polymer matrix. The material of the workpiece is transparent for radiation wavelength. The light diffusion surface of the workpiece is wetted with a fluid or viscoelastic medium (11), which has a similar refractive index like the materials of the workpiece. The light diffusion surface is wetted with the fluid or viscoelastic medium with a layer thickness of 250 nm to 10 mm. The material of the workpiece is a glass substrate. The glass substrate or the fluid or viscoelastic medium has no absorption in the wavelength range of 600-1500 nm or has an absorption grade of less than 10% and the radiation is used in the wavelength range of 600-1500 nm. The polymer matrix is arranged in contact with a surface of the workpiece that lies against the light diffusion surface. A material removal from the polymer matrix is caused by the radiation and the products separate itself from the workpiece as marking or labeling. The fluid or viscoelastic medium is removed from the light diffusion surface after marking or labeling. An INDEPENDENT CLAIM is included for a device for marking or labeling a workpiece using laser beam.