Patent ID: 6509548
Filing Date: 2003-01-21
Classification: B23K,B44B

Abstract:
A method for producing high-resolution laser-induced damage images inside an article of transparent material comprising:producing small laser-induced damages by generation of initial electron density inside a focal area and creation of a breakdown inside a part of said focal area; processing an image by converting a regular image into an arrangement of points united into areas so that all damages corresponding to the points of each area can be produced by scanning a laser beam relative to a direction orthogonal to a surface of said article; producing different gray shades of said laser-induced damages by variation of a density of damage arrangement; producing said laser-induced damages by directing said laser beam into predetermined points in said material by joint use of an optical scanner and a drive table for moving said article, and producing laser-induced damages without interruption of article movement relative to the laser beam and creating image areas with different brightness by modulation of a speed of said article.