Patent ID: 8481232
Filing Date: 2013-07-09
Classification: B42D,G03H

Abstract:
1. A hologram-oriented laser marking method for obtaining a hologram including information recorded therein of character, numerical character, picture pattern, biometric matter, and/or the like having a contrast, characterized in that said method comprises the step of: irradiating laser light to a selected region of a volume hologram layer including hologram interference fringes recorded therein so that the interference fringes recorded in the hologram layer are disordered, thereby enhancing or declining a function of the interference fringes for diffracting light-beams, characterized in that said method further comprises the step of: realizing a higher energy density at a light irradiation point of the volume hologram layer by the laser light, so as to control a bond between molecules to thereby promote uniformization of the interference fringes in a manner to provide a bright/dark contrast between an irradiated portion and a non-irradiated portion.