Polytechnic and design, Vol. 11 No. 3, 2023.
Original scientific paper
https://doi.org/10.19279/TVZ.PD.2023-11-3-06
ANALYSIS AND RECONSTRUCTION OF COMPUTER GENERATED HOLOGRAMS PRINTED BY CTF PRINTING TECHNIQUE
Sandra Kovačević
; University of Zagreb Faculty of Graphic Arts, Zagreb, Croatia
Damir Modrić
; University of Zagreb Faculty of Graphic Arts, Zagreb, Croatia
Vladimir Cviljušac
; University of Zagreb Faculty of Graphic Arts, Zagreb, Croatia
Abstract
Information systems nowadays enable faster, simpler and more secure communication. The growing need for ID security and brand protection encourages the global use of sophisticated technologies to ensure significant and effective barriers to counterfeiting, using security holograms. Printed computer-generated holograms (CGH) as a medium represent much greater potential than classical holography. They also opened up new aspects of understanding them in terms of their shortcomings. By analysis and reconstruction (numerical and optical), limits were set on the programs used that were used for the reconstruction of computer - generated holograms printed by the standard Computer to Film graphic procedure. By analyzing the obtained results of reconstructions of interfering samples during copying, we found that computer - generated holograms cannot be copied by these methods, ie it is not possible to generate a quality replica.
Keywords
CGH; holography; interference; optical reconstruction; numerical reconstruction; CtF printing proces
Hrčak ID:
311526
URI
Publication date:
24.11.2023.
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