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Discriminating medium, method of discriminating the medium, article to be discriminated and discriminating device

A technology of media and direction of rotation, applied in the direction of identifying devices, printed matter, recording carriers used by machines, etc., can solve the problems of easy misuse and low counterfeiting prevention

Inactive Publication Date: 2006-12-06
NHK SPRING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, special inks are relatively easy to obtain and are relatively easy to be misused, and the ability to prevent counterfeiting is not high

Method used

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  • Discriminating medium, method of discriminating the medium, article to be discriminated and discriminating device
  • Discriminating medium, method of discriminating the medium, article to be discriminated and discriminating device
  • Discriminating medium, method of discriminating the medium, article to be discriminated and discriminating device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0052] 1. Structure of Embodiment

[0053] figure 1 It is a cross-sectional view showing the cross-sectional structure of the identification medium of the embodiment. exist figure 1 3 shows a state in which the identification medium 100 using the present invention is attached and fixed to a predetermined article 101 such as a card through an adhesive layer or an adhesive layer 102 . The identification medium 100 has a structure in which a multilayer film 103 , an adhesive layer or an adhesive layer 104 , a cholesteric liquid crystal layer 106 , and a surface protection layer 107 are laminated.

[0054] The adhesive layer or adhesive layer 102 has the function of fixing the identification medium 100 on the object 101 . The adhesive layer or the adhesive layer 102 is made of a material that exhibits adhesive force once the release film is removed like a sheet, or an ultraviolet curable resin, a thermosetting resin, or other known adhesive materials. . The adhesive layer o...

no. 2 Embodiment approach

[0078] Figure 7 It is a sectional view showing the sectional structure of another embodiment. In this embodiment, in addition to figure 1 In addition to the structure shown, a pattern 108 produced by printing is added.

[0079] For example, in this structure, when viewed from a predetermined angle, the color of the reflected light from the cholesteric liquid crystal layer 106 and the color of the reflected light from the multilayer film 103 appear to be substantially the same, combined with other colors. The color of the pattern 108 is determined.

[0080] In this case, when observing the identification medium 100 from a predetermined angle, a predetermined color is emphasized and observed. Also, at this time, the hologram 105 can be seen, but since the pattern 108 is buried in the same color as the surroundings, it is hard to see.

[0081] Also, when the viewing angle is changed, the pattern 108 can be seen to emerge while the color around the pattern 108 changes with a...

no. 3 Embodiment approach

[0084] It is also possible to add a slit to a part of the identification medium of the present invention. In this case, when the identification medium is forcibly detached from the article for the purpose of reuse, the identification medium is destroyed through the gap and cannot be reused. In addition, this structure can be applied to an unsealing identification sheet for identifying whether a package has been unsealed.

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Abstract

A discriminating medium which cannot be easily forged and is high in authenticity discriminating capability. The discriminating medium comprises, laminated together, a cholesteric liquid crystal layer (106) and a multilayer thin film (103) formed by laminating optical thin films having different refractive indexes to provide unique optical properties that include in a reflection light circular polarizations having different rotating directions.A discrimination method using the above unique optical characteristics, an article to be discriminated by the discrimination medium, and a discrimination apparatus are provided.

Description

technical field [0001] The present invention relates to a recording medium suitable for identifying passports, documents, various cards, admission tickets, banknotes, exchange notes, securities, certificates, gift certificates, paintings, tickets, voting tickets for public games, recorded music or video, recorded computer Technology of authenticity (authenticity) of recording media of software, packaging of various products, etc. Background technique [0002] For various cards and certificates that can be charged, in order to prevent the illegal use of counterfeit products, a technology for judging the authenticity is required. [0003] As this technique, there is a technique of applying a special ink. For example, by printing predetermined characters or patterns using ink that fluoresces against ultraviolet rays, the pattern or characters will emerge when irradiated with ultraviolet rays, whereby the authenticity can be confirmed. In addition, a technique is known in whic...

Claims

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Application Information

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IPC IPC(8): G02B5/30B42D15/10G09F3/03G06K19/00G02B5/26G03H1/18G06K19/10
CPCB42D15/10B42D25/00B42D2033/26B42D25/391B42D25/364
Inventor 星野秀一竹内逸雄坂内宗穗大阿久晋
Owner NHK SPRING CO LTD
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