METHOD OF CUTTING GLASS BY LASER

摘要

1. A method for cutting glass by laser, comprising heating a local volume of a material with a directed laser beam between two surfaces by means of a partial energy absorption and subsequent cooling of the radiation zone, characterized in that the glass is treated to all its thickness by a parallel beam of laser radiation heating the material to a temperature above Tg, creating residual thermoelastic stresses. 2. The method according to claim 1, characterized in that the glass is The method according to claim 2, characterized in that the glass is treated by treated by heating to the temperature between Tg and Tf without visible surface distortions. 3. The method according to claim 1, characterized in that the glass is treated by heating to the temperature above Tf, creating semi-spheric convexities, different in shape and size. 4. The method according to claim 1, characterized in that the glass is treated by a continuous or discrete radiation in spots along straight, curved or closed lines. 5. The method according to claim 2, characterized in that the glass is treated by linear or discrete radiation, creating an optical anisotropy of the material both transversely and longitudinally. 6. The method according to claim 2, characterized in that the zone of radiation in glass is visualized through a polarizer. 7. The method according to claim 3, characterized in that in case of a single laser beam radiation the zone of radiation is further subjected to a mechanical effect, causing self-destruction of glass with subsequent its removal. 8. The method according to claim 3, characterized in that the glass is treated by radiation using a spiral-shaped trajectory or separate single impulses on an area limited by given mould with a subsequent removal of destroyed material.