Laser marking hologram and laser marking method directed to a hologram

摘要

The present invention provides for improving the security of a volume hologram by recording individualized information therein such as information about characters, numeric characters, image patterns, biometric patterns and / or the like by irradiating laser light into the volume hologram to thereby physically or chemically modify it and relates to a laser marker hologram having a volume hologram layer 2 containing interference fringes recorded therein, the volume hologram layer 2 containing information about characters, numeric characters, image patterns, biometric patterns and / or the like therein having a contrast between an irradiated portion and a non-chromatic image irradiated portion, wherein the contrast is provided by selectively irradiating laser light 10 into the volume hologram layer 2 for modifying 11 the irradiated portion.