Method of preparing an optically variable image device

0574363 - ÚPT 2024 RIV eng P - Patent Document
Horáček, Miroslav - Kolařík, Vladimír
Method of preparing an optically variable image device.
2023. Owner: Ústav přístrojové techniky AV ČR, v. v. i. Date of the patent acceptance: 13.09.2023. Patent Number: EP3497491. Territorial Protection: evropský patent s jednotným účinkem ,evropský patent podle Evropské patentové úmluvy ,mezinárodní patentová ochrana dle Smlouvy o patentové spolupráci.
Institutional support: RVO:68081731
Keywords : diffractive device * cross gratings * spiral arrangement
OECD category: Nano-processes (applications on nano-scale)
https://register.epo.org/application?number=EP17772297

Optically variable image device assuming the form of a planar optical structure, which comprises at least one planar primary area including micro or nano optical primitives or their sets forming said primary area of the planar optical structure, arranged such that an impinging light by interacting with said planar optical structure creates a visual perception of one image corresponding to a characteristic pattern of the respective combination of said three-dimensional phyllotactic model and said core model and, simultaneously, a different visual perception of another image or images corresponding to said graphic pattern. A method of preparing such optically variable image device is described as well.
Permanent Link: https://hdl.handle.net/11104/0344740