The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 2022
Filed:
Sep. 28, 2018
Sicpa Holding SA, Prilly, CH;
Andrea Callegari, Chavannes-près-Renens, CH;
Pierre Degott, Mollie-Margot, CH;
Todor Dinoev, Chavannes-près-Renens, CH;
Christophe Garnier, Reignier, FR;
Alain Mayer, Saint-George, CH;
Yuliy Schwartzburg, Lausanne, CH;
Romain Testuz, Lausanne, CH;
Mark Pauly, Lausanne, CH;
SICPA HOLDING SA, Prilly, CH;
Abstract
The invention relates to a thin optical security element comprising a reflective or refractive light-redirecting surface having a relief pattern operable to redirect incident light from a light source and form a projected image on a projection surface, the optical parameters of this optical security element fulfilling a specific projection criterion such that the projected image comprises a caustic pattern reproducing a reference pattern that is easily visually recognizable by a person. The invention also relates to a method for designing a relief pattern of an optical security element.