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:
Jun. 04, 2024
Filed:
Apr. 07, 2021
Applicant:
Sicpa Holding SA, Prilly, CH;
Inventors:
Assignee:
SICPA HOLDING SA, Prilly, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 26/08 (2006.01); B42D 25/30 (2014.01); B42D 25/405 (2014.01); G02B 1/10 (2015.01); G02B 27/18 (2006.01); G03F 1/68 (2012.01);
U.S. Cl.
CPC ...
G02B 26/0875 (2013.01); B42D 25/30 (2014.10); B42D 25/405 (2014.10); G02B 1/10 (2013.01); G02B 27/18 (2013.01); G03F 1/68 (2013.01);
Abstract
The invention relates to an anti-copy optical element comprising a caustic layer and a mask layer configured to simultaneously display a visible image reproducing a reference image and form a projected image containing a visible caustic pattern reproducing a reference pattern, upon illumination of the optical element with a light source, the projected image being distinct from the reference image. The invention also relates to a method for designing a relief pattern of a light-redirecting surface of said caustic layer consistently with the transmission properties of the mask layer.