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A security protection layer structure and method for a new version of Hong Kong and Macao travel permits

A technology of security protection and passport, applied in the fields of printing, optics, and physics, can solve the problems of complex production technology and low manufacturing cost, and achieve the effects of strong visibility, low manufacturing cost, and prevention of counterfeiting and copying

Active Publication Date: 2016-10-05
中国机动车辆安全鉴定检测中心 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the complicated technical problem of the existing pass in order to achieve authenticity identification, adopts the principle of optical diffraction, and produces a high-resolution color rendering pattern through a specially designed modulation structure, which is convenient for visual identification and low in manufacturing cost , strong decorative, because it serves as the outermost layer of security protection, it can prevent the replacement and tampering of personal information such as printed photos on the surface, and it is of great significance to ensure the social public security of the country, department, and group

Method used

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  • A security protection layer structure and method for a new version of Hong Kong and Macao travel permits
  • A security protection layer structure and method for a new version of Hong Kong and Macao travel permits
  • A security protection layer structure and method for a new version of Hong Kong and Macao travel permits

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Experimental program
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Embodiment 1

[0056] The implementation plan first carries out the graphic design related to aesthetics, and then uses the method of optical calculation holography to design the diffraction parameters. The relevant equation is:

[0057] d·sinθ=n·λ

[0058] Where d is the grating constant, θ is the diffraction angle, n is the grating order, and λ is the wavelength color

[0059] The above formula is a grating equation. When the flat light is incident at the incident angle θi, the grating equation is written as

[0060] d(sinθ m +sinθ i ) = mλ

[0061] m is an integer, the value is 0, ±1, ±2, ...

[0062] The calculated grating constants are given to each region and coded according to the corresponding gray value.

[0063] Through the computer-controlled interference exposure system, exposure is carried out on the surface of the positive photoresist, the photoresist type is AZ-1800, the thickness of the photoresist coating is 1 μm, and a grating relief structure with a depth of 0.3 μm t...

Embodiment 2

[0065] Calculate the grating frequency required to obtain the diffraction angle according to the grating equation, and distribute it to the area required for the design, perform vectorized format processing, and input it to the electron beam exposure machine for direct writing of high-resolution graphics to obtain electroresist Agent graphic structure, do silver mirror reaction on the surface of the etched graphic to form a conductive layer on the surface, and then put it in the electroplating tank for electroforming to thicken. The electroforming material is metal nickel. When the thickness of the electroforming metal reaches 0.2-0.4mm At the same time, take it out and separate it from the electro-etching plate to obtain the first-generation metal mother board. After the first-generation metal mother board is reproduced and backed up, the structural information can be copied and produced continuously in large quantities. For the realization of molding and processing, the infor...

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Abstract

The invention relates to the technical field of printing, optics, physics and the like, in particular to a safe protection layer structure and a method for new-version Exit-Entry Permit for Traveling to and from Hong Kong and Macau according to an optical diffraction principle. The safe protection layer structure is characterized in that a protection layer covers the surface layer of a card type certificate, the thickness is 3 mum to 6 mum, the protection layer adopts the optical diffraction principle and is provided with a micro structure modulator, a plurality of graphic regions form a visual window, high-resolution display patterns are generated, the modulation frequency is 899 line / mm to 3300 line / mm, the modulation depth is 0.06 mum to 0.3 mum, and the visible light transmission rate between 400 nm to 650nm is 70 percent to 95 percent. The structure and the method provided by the invention have the following obvious advantages that the visibility is high, multi-color diffraction images can be generated under the natural light illumination environment, the transparency is high, and the transmission rate is higher than 70 percent, the structure layer covers the surface of a card body and has the unpeelable performance, and the replacement and the tampering of printing photo data information can be effectively prevented; the anti-counterfeiting design of a composite structure is adopted, in addition, digital processing is carried out, the graphic breaking difficulty is high, and the similar peer counterfeiting and copying can be effectively prevented.

Description

[technical field] [0001] The invention relates to printing, optics, physics and other technical fields. According to the principle of optical diffraction, a specially designed modulation structure is used to generate high-resolution color graphics, which can be widely used in the security of card-type passes, card-type driving licenses, and driving documents. Identification, specifically, is a security protection layer structure and method for the new Hong Kong and Macao travel permit. [Background technique] [0002] Passes are often used in the management of personnel coming and going in special occasions such as special administrative areas, borders, military, and airport traffic jurisdictions. They are an important guarantee for the security interests of countries, departments, and groups, and require safe, convenient, and fast verification and release. With the maturity of electronic chips and the popularization of the Internet, passports have also entered the electronic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B42D25/24B42D25/30B42D25/328B42D25/40
Inventor 宋振强王永捷姜振飞胡祖元胡继伟桑建新
Owner 中国机动车辆安全鉴定检测中心
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