| 摘要 |
Laser irradiation wavelength and/or material parameters of plastic or pigments contained, are selected to maximize pigment- and minimize plastic- energy absorption. An independent claim is included for the corresponding marking equipment. Preferred features: The plastic comprises acrylonitrile butadiene styrene polymers or polymerisate, polymethylmethacrylate and/or polyacrylate. Pigments are carbon black and/or Iriodin(RTM) and/or are used as catalysts on the surrounding material. Organic materials are used for the plastic or pigments. These are darkened by e.g. carbonization or otherwise colored, when irradiated using ultraviolet or infrared light. In an alternative method, a lens (9) focuses irradiation to generate gas bubbles on either surface (2, 3) or inside the plastic, at specific locations (10). Initially, high intensity irradiation forms an absorption nucleus, followed especially by lower intensity to complete coloration or localized bubbling. In a development the suitably-pulsed beam and capsule are moved relatively, to make overlapping bubbles or coloration, producing extended markings. The relative velocity is 100-300 mm/s. Motion may include angular, rotary or linear components. Pulsing is executed 3-5 kHz. The marking method is further detailed. It may be carried out on a complete spirit level. |
