Nanooptical elements for visual verification

Abstract This paper focuses on the development of flat diffractive optical elements (DOEs) for protecting banknotes, documents, plastic cards, and securities against counterfeiting. A DOE is a flat diffractive element whose microrelief, when illuminated by white light, forms a visual image consistin...

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Autores principales:	Alexander Goncharsky, Anton Goncharsky, Dmitry Melnik, Svyatoslav Durlevich
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b0325f47f8234268ba25d0c05270cf92
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spelling	oai:doaj.org-article:b0325f47f8234268ba25d0c05270cf922021-12-02T14:16:58ZNanooptical elements for visual verification10.1038/s41598-021-81950-w2045-2322https://doaj.org/article/b0325f47f8234268ba25d0c05270cf922021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81950-whttps://doaj.org/toc/2045-2322Abstract This paper focuses on the development of flat diffractive optical elements (DOEs) for protecting banknotes, documents, plastic cards, and securities against counterfeiting. A DOE is a flat diffractive element whose microrelief, when illuminated by white light, forms a visual image consisting of several symbols (digits or letters), which move across the optical element when tilted. The images formed by these elements are asymmetric with respect to the zero order. To form these images, the microrelief of a DOE must itself be asymmetric. The microrelief has a depth of ~ 0.3 microns and is shaped with an accuracy of ~ 10–15 nm using electron-beam lithography. The DOEs developed in this work are securely protected against counterfeiting and can be replicated hundreds of millions of times using standard equipment meant for the mass production of relief holograms.Alexander GoncharskyAnton GoncharskyDmitry MelnikSvyatoslav DurlevichNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alexander Goncharsky Anton Goncharsky Dmitry Melnik Svyatoslav Durlevich Nanooptical elements for visual verification
description	Abstract This paper focuses on the development of flat diffractive optical elements (DOEs) for protecting banknotes, documents, plastic cards, and securities against counterfeiting. A DOE is a flat diffractive element whose microrelief, when illuminated by white light, forms a visual image consisting of several symbols (digits or letters), which move across the optical element when tilted. The images formed by these elements are asymmetric with respect to the zero order. To form these images, the microrelief of a DOE must itself be asymmetric. The microrelief has a depth of ~ 0.3 microns and is shaped with an accuracy of ~ 10–15 nm using electron-beam lithography. The DOEs developed in this work are securely protected against counterfeiting and can be replicated hundreds of millions of times using standard equipment meant for the mass production of relief holograms.
format	article
author	Alexander Goncharsky Anton Goncharsky Dmitry Melnik Svyatoslav Durlevich
author_facet	Alexander Goncharsky Anton Goncharsky Dmitry Melnik Svyatoslav Durlevich
author_sort	Alexander Goncharsky
title	Nanooptical elements for visual verification
title_short	Nanooptical elements for visual verification
title_full	Nanooptical elements for visual verification
title_fullStr	Nanooptical elements for visual verification
title_full_unstemmed	Nanooptical elements for visual verification
title_sort	nanooptical elements for visual verification
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b0325f47f8234268ba25d0c05270cf92
work_keys_str_mv	AT alexandergoncharsky nanoopticalelementsforvisualverification AT antongoncharsky nanoopticalelementsforvisualverification AT dmitrymelnik nanoopticalelementsforvisualverification AT svyatoslavdurlevich nanoopticalelementsforvisualverification
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Nanooptical elements for visual verification

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