One of the important fields of application of synthetic diffractive structures is optical document security. Several methods of security enhancement of diffractive elements for security applications are presented, namely, high carrier-frequency cryptograms and noise-covered elements are introduced. Structures are designed with respect to the fabrication on special enhanced integral dot-matrix system.
© 2006 Optical Society of America
Marek Skeren, Pavel Fiala, and Ivan Richter, "Synthetic diffractive elements for security applications realized on an enhanced integral dot-matrix system," Appl. Opt. 45, 27-32 (2006)