Abstract

Using a special holographic technique, moiré patterns can be recorded with a horizontal parallax, thus producing a fascinating artistic effect. With special characteristics, holographic moiré patterns can be used as secret codes in security holograms for different security purposes. A remarkable anticounterfeit effect has been achieved by using this kind of security hologram to protect famous high-quality products. The technique used for recording moiré patterns is described, and sample holograms are shown.

© 1995 Optical Society of America

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