Patent ID: 7405851
Filing Date: 2008-07-29
Classification: G03H,G06K

Abstract:
1. A method for producing holograms as identification areas provided on articles, said articles being identifiable using an intensity pattern reproduced from the hologram, said method comprising: providing article identification data in a two dimensional array; digitally calculating a two dimensional pattern of hologram interference fringes on the basis of said two-dimensional array providing a modulation for writing each part of said two dimensional pattern of hologram interference fringes point-by-point onto a data carrier using a laser as a hologram writing means; said article identification data provided as individual article identification data; the laser used as the hologram writing means being a single ray laser fed from a power supply; modulating said power supply to provide an intensity modulation to the laser ray for hologram writing; and wherein such data carrier is a polymer applicable to the article.