Patent ID: 7158145

Claim:
A method for applying colored information to an object, the object having at least two different chromophoric particles, at least in a layer close to a surface of the object, which change a color of this layer under the influence of laser radiation, comprising: producing first and second laser beams having first and second different wavelengths (λ 1 , λ 2 ) respectively, reflecting the first and second laser beams using a beam guiding means in order to guide the reflected first and second laser beams, without matching orthogonal polarization, to a two-coordinate beam deflection device, and so that the first and second laser beams are emitted from the two-coordinate beam deflection device on a common axis, and using a focusing device to focus the first and second laser beams emitted from the two-coordinate beam deflection device onto the layer of the object; and wherein the beam guiding means comprises a first rotatable, metallic deflection mirror of the two-coordinate beam deflection device, by means of which the first laser beam having the wavelength (λ 1 ) and at least the second laser beam having the wavelength (λ 2 ) are reflected in the direction of a second rotatable, metallic deflection mirror of the two-coordinate beam deflection device, which then reflects the laser beams in the direction of the focusing device for focusing the laser radiation onto a layer of the object, the first deflection mirror being rotated by a first offset value, and the second deflection mirror being rotated by a second offset value.