Security elements used in color three-dimensional security holograms, methods for their production and control
Abstract
The article describes the features of the security elements used in color three-dimensional security holograms. Unlike classical security holograms - "rainbow" relief - phase holograms, color three-dimensional security holograms have spectral and angular selectivity. This feature allows them to create new security elements or use the properties of already known elements as a new. The article describes the schemes and devices for creating such security elements, as well as devices for their visualization and control. Examples of typical security elements used in color three-dimensional security holograms are presented. This work was supported by the Russian Science Foundation (Project No. 18-79-00304).
- Publication:
-
Holography: Advances and Modern Trends VI
- Pub Date:
- April 2019
- DOI:
- 10.1117/12.2520438
- Bibcode:
- 2019SPIE11030E..15L