Optical security elements, marked object, method of authenticating an object and use of optical security elements for authenticating or securing against counterfeiting

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United States of America Patent

PATENT NO 11987066
APP PUB NO 20210370703A1
SERIAL NO

17282959

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Abstract

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An optical security element made of a refractive transparent or partially transparent optical material and comprising an optical assembly of a caustic layer having a light-redirecting surface with a relief pattern of given depth and a focal length fC and an adjacent lens element of focal length fL configured to redirect incident light received from a point-like light source through it and to form a projected image containing a caustic pattern directly on a retina of an observer. A marked object, as well as a method of visually authenticating an object, and use of optical security elements for authenticating or securing against counterfeiting are also disclosed.

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Patent Owner(s)

Patent OwnerAddress
SICPA HOLDING SAAVENUE DE FLORISSANT 41 1008 PRILLY 1008

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Callegari, Andrea Chavannes-près-Renens, CH 32 204
Degott, Pierre Mollie-Margot, CH 66 993
Dinoev, Todor Chavannes-près-Renens, CH 9 19
Egger, Philipp Crissier, CH 6 80

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