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Optical anti-counterfeiting film used for certificates and application thereof

An optical anti-counterfeiting and certificate technology, which is applied in the direction of information-carrying cards, patterns characterized by light projection effects, decorative art, etc., can solve problems such as technology obsolescence, anti-counterfeiting security threats, easy forgery or counterfeiting, and achieve space utilization. The effect of high, high color saturation, and small influencing factors

Active Publication Date: 2010-06-09
上海冠众光学科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional anti-counterfeiting method usually uses special ink combined with high-precision printing methods to make some cards. The manufacture of certificates, so scientists have adopted many electronic, biological, and information technologies to join the field of card manufacturing. The integration of these technologies has played a role in suppressing counterfeit certificates. However, it is still indispensable for the first-line public anti-counterfeiting important theme of
[0003] Optical anti-counterfeiting film has also been used for visual anti-counterfeiting identification of bank cards, coins, stamps, ID cards and important commodities as early as the 1980s. It is a widely recognized first-line public anti-counterfeiting measure. Among them, laser Holographic technology once played an important role. It has the characteristics of strong three-dimensionality, dazzling colors, and dynamic vitality. It is widely used in identification documents such as ID cards, driver's licenses, passports, Olympic Games, and Canton Fair access cards. It is used in visual optics However, with the passage of time, some new problems have emerged: ①The technology is gradually becoming obsolete and lacks new ideas
② Some of the original technologies have been quite popular, and the anti-counterfeiting security is threatened and questioned
③Single technology, less visual information, easy to forge or counterfeit
④ Similar anti-counterfeiting technologies are difficult to distinguish and screen

Method used

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  • Optical anti-counterfeiting film used for certificates and application thereof
  • Optical anti-counterfeiting film used for certificates and application thereof
  • Optical anti-counterfeiting film used for certificates and application thereof

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Embodiment Construction

[0038] 1. Using a 355nm wavelength laser light source, the laser beam L is divided into two beams L by a beam splitting element 1 and L 2 Afterwards, they are aggregated at an angle of θ through the lens, forming light and dark interference fringes at the converging point (see Figure 6 ).

[0039] 2. Use the computer program to control the movement x, y of the exposure position, the beam splitting angle θ device and the rotation angle β, and write the light and dark interference fringes of the pre-designed pattern strokes on the photoresist dry plate K. The θ angle adjustment range is 10.2°~77°, the β angle rotation range is 0°~179.3°, and the unit area of ​​each exposure point is 400μm 2 .

[0040] 3. After the photoresist dry plate K is developed, a microstructure concave plate pattern with diffraction characteristics is formed on the exposed area.

[0041] 4. Copy and transfer the photoresist concave plate with microstructure to the metal nickel plate through the elect...

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Abstract

The invention relates to a visual optical anti-counterfeiting film used for certificate surface, belonging to the public safety precaution and identification technical field. The optical anti-counterfeiting film can be widely applied to anti-counterfeiting and identification of identity certificates such as identity card, passport, police identification card, press card, certificate of lawyer, admission card for event and the like. The invention is characterized in that the optical anti-counterfeiting film is composed of a base layer, an information layer, a metal or metal compound layer and an embedding protective layer at least which are sequentially arranged from the top to bottom, wherein the interior of the base layer is embedded with multiple space frequency composite modulation microstructure stripe. Compared with the prior art, the invention has the following advantages: spatial use ratio is high, diffraction image without mutual interference can be seen at different angles in the same region; image vision angle width reappears in reflected light direction, colour saturation is high, influence of environmental lighting source is less; the reflected light direction can be light discoloration produced by the way that light continuation is simultaneously taken place on more than three broken colours; the restored true colour combined by RGB three colours can be reproduced in the reflected light direction; dynamic diffraction image can be reproduced by virtue of edge lighting light. The invention can be widely applied to visual anti-counterfeiting identification of identity certificates of resident identity card, passport, police identification card, press card, certificate of lawyer, teacher certificate.

Description

[technical field] [0001] The invention relates to a visual optical anti-counterfeiting film used on the surface of certificates, which belongs to the technical field of public security prevention and identification, and can be widely used in ID cards, passports, police cards, reporter cards, lawyer cards, and large-scale event admission cards and other identities. Anti-counterfeiting and identification of similar documents. [Background technique] [0002] With the development of society, human activities are becoming more and more frequent, and the management of social order is facing more challenges, especially the prevention and management of public safety. , major events and access to important places, etc. People need to interpret and identify personal identities on many occasions. Although with the advancement of science and technology, electronic and information technology are widely used in the management of personal identities, but for personal identity The certific...

Claims

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Application Information

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IPC IPC(8): G09F3/02B44F1/12B42D25/30B42D25/328
CPCG03H2001/0482G03H2001/0497
Inventor 王青胡继伟姜振飞桑建新董耀宗龚春燕
Owner 上海冠众光学科技有限公司
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