METHOD FOR FORMING THE IMAGE PATTERN OF A THREE-DIMENSIONAL SECURITY FILM BASED ON A LASER MARKING OPERATION CAPABLE OF PREVENTING ENVIRONMENTAL PROBLEMS DUE TO HARMFUL MATERIALS FROM AN IMAGE PATTERN FORMING PROCESS

摘要

PURPOSE: A method for forming the image pattern of a three-dimensional security film based on a laser marking operation is provided to form an image pattern at the accurate focus position of a micro lens.;CONSTITUTION: A method for forming the image pattern of a three-dimensional security film based on a laser marking operation includes the following: a micro lens(110) is arranged on one side of a base layer(100); a supporting layer(200) containing light absorbing materials on another side of the base layer; the supporting layer is irradiated with laser beam through the micro lens; and an image pattern(210) is marked on the supporting layer. The supporting layer is vertically irradiated with the laser beam. The light absorbing materials of the supporting layer is discolored or etched by the laser beam.;COPYRIGHT KIPO 2012