Holographic printing is an anti-counterfeiting printing technology developed using laser holographic imaging technology. A three-dimensional model is illuminated from different angles with a laser beam and reference light separated from the laser beam. The light reflected by the model passes through a slit to form interference fringes containing the model holographic information. This interference fringe was recorded on a photographic film, turned into a nickel plate, and pressed on an aluminized film to reproduce the model holographic pattern under normal light. This is the principle of holographic printing.
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