Synthetic diffractive elements for security applications realized on an enhanced integral dot-matrix system.
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.
Skeren
Marek
M
Department of Physical Electronics, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehová 7, Prague 1, 115 19, Czech Republic. skeren@troja.fjfi.cvut.cz
Fiala
Pavel
P
Richter
Ivan
I