Abstract
Several methods of security enhancement of diffractive elements for security applications are presented, namely high carrier frequency cryptograms, Fresnel multi-focal cryptograms, and noise covered elements are introduced. Designed structures are realized on special integral dot-matrix system.
© 2004 Optical Society of America
PDF ArticleMore Like This
Andreas Gombert
DTuD3 Diffractive Optics and Micro-Optics (DOMO) 2004
Sham Dixit, Joe Menapace, June Yu, Jerry Britten, and Rod Hyde
DSuA2 Diffractive Optics and Micro-Optics (DOMO) 2004
Marek Škereň, Jakub Svoboda, Martin Nývlt, and Pavel Fiala
FTuM2 Frontiers in Optics (FiO) 2011