Variable optical information code

Abstract

The utility model belongs to the field of information processing, and particularly relates to a variable optical information code. The variable optical information code comprises an information code layer and an optical variable information layer, the information code layer and the optical variable information layer are connected through an adhesive layer, a base material layer is arranged on the face, away from the optical variable information layer, of the information code layer, and a transfer layer is arranged on the face, away from the information code layer, of the optical variable information layer. A material with optical discoloration is arranged on an information code as a light-changing layer, so that the information code has an optical discoloration effect, the natural color of the information code can be seen at a normal observation angle, reading of the information code is not affected, the information code is brown and green when observed at other specific angles, the colors cannot appear during scanning, and the information code can be scanned. Therefore, the information code has anti-copying and anti-copying functions, has strong anti-counterfeiting performance, and simultaneously enables the information code to have aesthetic property and interestingness.

Description

Technical Field

[0001] The utility model belongs to the field of information processing, and in particular relates to a variable optical information code. Background Art

[0002] An information code is a coding system for storing and transmitting information, usually including information in the form of text, numbers, symbols, etc., and can represent various types of information through different coding methods, such as barcodes, QR codes, variable information codes, etc. Existing variable information codes are generally made by printing, that is, a layer of colored pigment is printed on the ordinary information code, usually in black or color. The information code produced in this way does not have an anti-copying function, and can be copied by scanning, taking pictures, etc., and then mass-produced. In view of this, it is necessary to develop a variable optical information code with anti-copying and anti-photocopying functions. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides an information code with an optical color-changing effect and the functions of anti-copying and anti-duplication.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A variable optical information code comprises an information code layer and an optically variable information layer, wherein the information code layer and the optically variable information layer are connected via an adhesive layer, a substrate layer is provided on a side of the information code layer away from the optically variable information layer, and a transfer layer is provided on a side of the optically variable information layer away from the information code layer; the optically variable information layer has a nano grating structure.

[0006] Furthermore, the line width of the nano-grating structure is 150-225 nm.

[0007] Furthermore, the optically variable information layer is transferred onto the information code by roller hot pressing.

[0008] Furthermore, a refractive layer is further included between the optically variable information layer and the adhesive layer.

[0009] Furthermore, the information code has a thickness of 1-2 μm.

[0010] Furthermore, the transfer layer is a release resin.

[0011] Furthermore, the substrate layer is one of PE, PP, PC and PET.

[0012] The beneficial effects of the utility model are:

[0013] The utility model provides a variable light information code, in which a material with optical color change is arranged as a light change layer on the information code, so that the information code has an optical color change effect. Under normal observation angles, the original color of the information code can be seen without affecting the reading of the information code. When observed at other specific angles, brown and green are respectively presented, and these colors will not appear during scanning. Therefore, the code has the function of preventing copying and photocopying, has strong anti-counterfeiting properties, and also makes the information code beautiful and interesting. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] 1. Information code layer; 2. Optically variable information layer; 3. Adhesive layer; 4. Base material layer; 5. Transfer layer; 6. Refraction layer. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0018] Information code (barcode, QR code, variable light information code, etc.) is a coding system for storing and transmitting information, usually including information in the form of text, numbers, symbols, etc. Information code is widely used in various fields in modern society, providing convenience for the rapid acquisition, transmission and identification of information. With the development of technology, the application scope and functions of information code are also constantly expanding, bringing more convenience and possibilities to people's lives.

[0019] The utility model provides a variable optical information code with anti-copying and anti-duplication functions, including an information code layer 1 and an optically variable information layer 2, wherein the information code layer 1 and the optically variable information layer 2 are connected via an adhesive layer 3, a substrate layer 4 is provided on the side of the information code layer 1 away from the optically variable information layer 2, and a transfer layer 5 is provided on the side of the optically variable information layer 2 away from the information code layer 1.

[0020] The light-changing layer uses optical principles and changes the light reflected or transmitted by the light-changing layer at different angles on the surface of the information code layer 1 according to the refraction, reflection or interference characteristics of the light, so that the light-changing layer has an optical color-changing effect. Specifically, the light-changing layer of the utility model has a nano-grating structure, and the nano-grating structure has an optical element with a microscopic scale structure. It can adjust the interference, scattering and transmission characteristics of light. For example, by adjusting the period, depth and shape of the nano-grating structure, the interference and scattering effects of light of different wavelengths can be accurately controlled, thereby presenting richer color changes and visual effects. More specifically, the line width of the nano-grating structure of the utility model is 150-225nm, preferably 175nm. This periodic line width is invisible light under normal observation angle, so it will not interfere with the normal reading of the traceability code and affect the code reading speed or even the code reading failure.

[0021] The substrate layer 4 may be made of polyethylene (PE), polypropylene (PP), polycarbonate (PC), polyethylene terephthalate (PET), etc., which have good transparency, flexibility and processability, and is preferably PET, which is suitable for printing the information code layer 1.

[0022] The transfer layer 5 is used to protect the optically variable layer and may be a resin release layer.

[0023] In some embodiments, the optically variable information layer 2 is transferred to the information code by roller hot pressing. Specifically, a transparent adhesive layer 3 is sprayed on the printed information code layer 1, and then the optically variable layer is heated by a roller (80-100 degrees Celsius), and 3-5 kilograms of pressure is applied at the same time, and the optically variable layer is transferred to the information code layer 1 by thermal transfer, so that the information code has an optical color change effect. The thermal transfer method can make the obtained variable optical information code have the advantages of high clarity, durability and environmental protection. The thickness of the information code here is 1-2μm.

[0024] In some embodiments, in order to improve the optical effect and enhance the anti-counterfeiting performance, a refractive layer 6 is further included between the optically variable information layer 2 and the adhesive layer 3, wherein the refractive layer 6 can change the refractive index of light when passing through different media, thereby adjusting the incident angle and direction of the light. It can be understood that by reasonably designing the refractive index and thickness of the refractive layer 6, the light can produce a more complex and rich optical effect on the nano-grating structure, thereby enhancing the visual effect of the optically variable information code. In addition, the refractive layer 6 is arranged below the optically variable information layer 2 to protect the optically variable information layer from being eroded by the adhesive layer, thereby causing the optically variable effect to fail.

[0025] In addition, the presence of the refractive layer 6 makes it more difficult for counterfeiters to copy or simulate products with the same optical effect, thereby improving the security and credibility of the optically variable information code. Specifically, the refractive layer 6 is silicon dioxide or zinc sulfide, preferably a transparent medium layer.

[0026] The utility model provides a variable light information code with anti-copying and anti-duplication functions, which is used in the fields of anti-counterfeiting labels, product packaging, advertising, etc., and can improve the recognition and aesthetics of the information code, while also increasing the anti-counterfeiting function of the information code. By designing and producing an information code with a variable color effect, it can attract more consumers' attention and enhance the brand image and product value.

[0027] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A variable optical information code, characterized in that: It comprises an information code layer and an optically variable information layer, wherein the information code layer and the optically variable information layer are connected via an adhesive layer, a substrate layer is provided on one side of the information code layer away from the optically variable information layer, and a transfer layer is provided on one side of the optically variable information layer away from the information code layer; The optically variable information layer has a nano grating structure.

2. The information code according to claim 1, characterized in that: The line width of the nano-grating structure is 150-225 nm.

3. The information code according to any one of claims 1 to 2, characterized in that: The optically variable information layer is transferred onto the information code by roller heat pressing.

4. The information code according to claim 1, characterized in that: A refractive layer is also included between the optically variable information layer and the adhesive layer.

5. The information code according to claim 1, characterized in that: The information code has a thickness of 1-2 μm.

6. The information code according to claim 1, characterized in that: The transfer layer is a release resin.

7. The information code according to claim 1, characterized in that: The substrate layer is one of PE, PP, PC and PET.

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