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:
Sep. 30, 2025
Filed:
Aug. 07, 2020
Zhongchao Special Security Technology Co., Ltd, Beijing, CN;
China Banknote Printing and Minting Corp., Beijing, CN;
Zhongchao Special Security Technology Co., Ltd, Beijing, CN;
China Banknote Printing and Minting Corp., Beijing, CN;
Abstract
The disclosure provides an optical anti-counterfeiting element () and an optical anti-counterfeiting product (), which belong to the technical field of optical anti-counterfeiting. The optical anti-counterfeiting element includes: a substrate () having a first surface () and a second surface () opposite each other, at least a partial region of the substrate is transparent; and a first transflective coating (), a dielectric layer () and a second transflective coating () which are sequentially deposited on the first surface, wherein a ratio of a refractive index to an extinction coefficient of the first transflective coating is different from a ratio of a refractive index to an extinction coefficient of the second transflective coating. When observed from the first surface, the optical anti-counterfeiting element appears in a relatively bright first color; when observed from the second surface, the optical anti-counterfeiting element appears in a relatively bright second color.