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Safety line

A technology of safety line and grating layer, applied in the field of safety line, can solve the problems of increasing potential risks of safety line and so on

Active Publication Date: 2009-02-18
ZHONGCHAO SPECIAL SECURITY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] With the increasing popularity of diffractive light-changing technology and interference light-changing technology, the potential risk of counterfeiting security threads made using these two technologies is also increasing

Method used

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Embodiment Construction

[0016] In order to better understand the present invention, the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the drawings and detailed description are illustrative of preferred embodiments of the invention and are not intended to limit the scope of the invention in any way. In the drawings, the same reference numerals represent the same components.

[0017] Like the safety thread in the prior art, the safety thread of the present invention has a certain width. figure 1 A schematic cross-sectional view of a security thread 100 according to an embodiment of the present invention is shown. The security thread 100 includes a base layer 1 and a grating layer 2 formed on the base layer 1 . By designing the optical structure of the security thread 100, for example, controlling the parameters such as the grating period, direction, groove depth, refractive index and thickness of the grating layer 2, and ...

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Abstract

The invention provides a safety line which comprises a substrate (1) and a grating layer (2). The grating layer is formed on the substrate (1). Under illumination, at least partial area of the safety line is in one color; under the same illumination, after rotating the safety line in the plane thereon for certain angle, the area turns to another color; and the reconstructing light is linear polarization. Such phototropy property of the safety line is obviously different from diffraction optical variability property and interference optical variability; the public can easily distinguish; meanwhile, the polarization of the reconstructing light can be easily read by a machine when used as secondary anti-fake characteristic. The safety line is provided with the characteristics of holograph marks, printed patterns, metal hollowed patterns, magnetism and fluorescence.

Description

technical field [0001] The invention relates to a security thread for improving the security performance of paper, in particular to a window security thread used in banknotes. Background technique [0002] In order to prevent high-security products such as banknotes and bills from being illegally copied or imitated, people design and embed a kind of security thread in paper. There are two ways to embed the security thread, one is window-type embedding, that is, the security thread is partially embedded in the paper and partially exposed on the paper. Another way of embedding is to completely embed the entire security thread in the paper. Now, the security thread is widely used in the circulation banknotes of various countries, and the width of the security thread of most products is 1mm-5mm. Chinese Patent No. 200410062644.X discloses a double-sided security thread with a diffractive optical image. The security thread forms an optical anti-counterfeiting information layer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/42
Inventor 张静芳王晓利朱军李尚昆叶中东刘立民
Owner ZHONGCHAO SPECIAL SECURITY TECH
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