China Banknote Printing and Minting Corporation

Zhongchao Special Security Technology Co., Ltd

Sicpa Holding Sa

China Banknote Sicpa Security Ink Co., Ltd.

Chunhua Hu

Weiwei Zhang

Jun Zhu

Kai Sun

Baoli Zhang

Zhongdong Ye

Jing Li

Pierre Degott

Xinyi Li

Gebhard Ritter

Fangyi Sun

Weiru Wang

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.

Optical anti-counterfeiting element and optical anti-counterfeiting product

The disclosure provides an optical anti-counterfeiting element and an optical anti-counterfeiting product, the optical anti-counterfeiting element includes: a substrate () having a first surface and a second surface opposite to each other; a microstructure formation layer () formed on the first surface, the microstructure formation layer () includes at least a first region (), the first region () includes at least a first microstructure (), the first microstructure () includes a convex portion and/or a concave portion; and optically variable coatings () homomorphically covering on the first microstructure (), the optically variable coatings () include reflective layers (), dielectric layers () and absorption layers () which are stacked in sequence, wherein the reflective layers () or the absorption layers () are in contact with the first microstructure (), and the dielectric layers () are obtained by coating or printing.

An optical anti-counterfeiting element and manufacturing methods of the optical anti-counterfeiting element are provided. The optical anti-counterfeiting element includes an undulating structure layer provided with a first area, a second area and a third area; the first area has a first microstructure; the second area has a second microstructure; the third area is an unstructured flat area; a specific volume of the second microstructure is greater than a specific volume of the first microstructure; the first area and the third area are respectively provided with a reflecting layer, a dielectric layer and an absorbing layer which are overlapped, and the second area is not provided with a reflecting layer; and a surface appearance of one side, far away from the undulating structure layer, of the dielectric layer of the first area is obviously different from a surface appearance of the undulating structure layer.

Optical anti-counterfeiting element and manufacturing method therefor

An optical anti-counterfeit element includes an undulating structure layer (); the undulating structure layer includes a first area (A) with a first microstructure and a second area (B) with a second microstructure; a structural parameter of the second microstructure is greater than a structural parameter of the first microstructure; the undulating structure layer also includes a third area (C) with a third microstructure; a structural parameter of the third microstructure is greater than the structural parameter of the second microstructure; a first plating layer () is arranged on the first area; a second plating layer () is arranged on the second area; the third area is not provided with a first plating layer or a second plating layer; and viewed from one side of the optical anti-counterfeit element, the first area has an optical feature of a combination of the first microstructure and the first plating layer, the second area has an optical feature of a combination of the second microstructure and the second plating layer.

Multi-plating-layer optical anti-counterfeiting element and manufacturing method thereof

Disclosed are an optical anti-counterfeiting element and an optical anti-counterfeiting product utilizing the same, the optical anti-counterfeiting element comprising: a substrate () having a first surface () and a second surface () that are opposed to each other, a sampling and synthesizing layer () on a first surface () of the substrate (); and a micro-image layer () on a second surface () of the substrate (), the micro-image layer () including a first region at least partially covered with a coating () and a second region comprising at least two sub-regions each at least partially covered with a color function layer (), the color function layers () in respective sub-regions and the coating () in the first region have different color characteristics, respectively, and the micro-image layer () can be sampled and synthesized by the sampling and synthesizing layer () to form an image. Such optical anti-counterfeiting element and optical anti-counterfeiting product are easy to identify and difficult to counterfeit.

Optical anti-counterfeiting element and optical anti-counterfeiting product utilizing the same

Security threads or stripes include a substrate and i) a first optically variable layer imparting a first different color impression at different viewing angles, ii) a second optically variable layer imparting a second different color impression at different viewing angles, iii) a first color constant layer having a color matching the color impression of the first or second optically variable layer at a first viewing angle, iv) a second color constant layer having a color matching the color impression of the first or second optically variable layer at a second viewing angle, and v) one or more material-free regions, wherein the first optically variable layer, the second optically variable layer, the first color constant layer, the second color constant layer and the one or more material-free regions are jointly visible from one side of the security thread or stripe.

Growing community of inventors

Beijing, China

Chunhua Hu