Device for displaying file anti-counterfeiting mark

Abstract

The invention provides a device for displaying a file anti-counterfeiting mark which is used for checking whether a banknote class file is true or false, and enables the observation of the anti-counterfeiting mark to be simple and convenient by utilizing a safe illumination. The device for displaying the file anti-counterfeiting mark comprises a first light source and a second light source used for illuminating a corresponding anti-counterfeiting part of a file, and also comprises an optical receiver used for transforming reflection light of the anti-counterfeiting part into an electrical signal, and an analysis device which analyzes the electrical signal come from the optical receiver, controls the light of the second light source and notices device users the related characteristics of the anti-counterfeiting mark. The first light source is operated under a pulse mode, an optical channel conducting the light radiated from the file to the optical receiver and an optical channel conducting the second light source to the file comprise a common area, and an optical system with a refractive power. The second light source changes the colors of the light by taking a detected mark as a characteristic in a given periodic sequence, and forms a visible form on a file surface containing the mark or information. The optical receiver may comprise various components, and the intensity distribution of the second light source in a discriminating zone reflects the physical size of the anti-counterfeiting mark distributed on the discriminating zone.

Description

technical field [0001] The invention relates to authenticity identification of anti-counterfeit documents, such as banknote identification. Background technique [0002] There are many anti-counterfeiting methods for anti-counterfeiting documents. Usually, special attributes are attached to the document, which is difficult or impossible to reproduce unless special equipment, materials and substances are used. One of the most common means of protection is that part of the graphic on the banknote has special optical, magnetic, electronic and other properties. This part of the graphic on the banknote is called a security feature. Certain special guard marking properties can be determined visually. Hidden markers are also widely used and require special equipment to specify their properties. [0003] Document authenticity often depends on visual identification. In order to visualize covert security features, specific devices must be used to reveal the special properties of t...

AI Technical Summary

Problems solved by technology

However, international safety standards cannot be guaranteed because the methods on which these standards rely to determine radiological hazards are fundamentally different

This is also a disadvantage of the device, the possibility of using it in many countries is greatly limited

[0012] The common disadvantage of some well-known anti-Stokes marking visualization devices is that the marking visibility is poor under strong external light, such as when used outdoors, the user will feel inconvenience

However, known visualization devices are not currently equipped with this feature

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