JP2008080697A - Forgery-proof printed matter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forgery-proof printed matter which is free from irregularitis in color change etc., and has excellent designability and no recognition discrepancy of genuineness/falseness judgement according to an observer (judge etc.) and can be easily manufactured certainly, and a genuineness/falseness judgement method. <P>SOLUTION: This forgery-proof printed matter 10 has a pattern 2A formed of a region which reflects or absorbs only a straight-line polarization in a specific direction and a pattern 2B formed of a region which reflects or absorbs only the straigh-line polarization in a direction orthogonal to the straight-line polarization which is reflected or absorbed from the region of the pattern 2A, among two similar patterns. For the judgement of genuineness/falseness, the printed matter can be judged as a genuine one when stereoscopically recognized by observing with one eye 5A using the straight-line polarization filter 4A which can observe the pattern 1 and cannot observe the pattern 2, and with the other eye 5B using the straight-line polarization filter 4B which can observe the pattern 2 and cannot observe the pattern 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an anti-counterfeit printed matter that prevents counterfeiting due to copying and the like, and more particularly, to an anti-counterfeiting printed matter that has special design characteristics, is difficult to counterfeit due to copying and the like, and can easily determine its authenticity. Is.

  Along with the rapid spread of copiers using recent electrophotographic technology, anyone can easily create copies that are extremely difficult to distinguish between manuscripts and copies using recent color copiers. It became so. Thus, while color copies are convenient, securities such as stock certificates, bonds, promissory notes, checks, and printed matter such as admission tickets and boarding passes are easily forged. As a means for checking such a copy and improving security, the above-mentioned securities and the like have been subjected to a technique for preventing forgery by various copies. For example, copy prevention technology using base materials such as watermarked paper, colored paper, and chipped paper, printing of background patterns, color patterns, stick color patterns, logo lines, and special inks such as fluorescent ink and decoloring ink And a copy prevention technique called electronic watermark that is created by including information indicating that the object is a copy-prohibited object in a printed document.

  In addition to these copy prevention techniques, anti-counterfeit printing provided with a color changing portion in which the color changes is also considered in consideration of design and the like. For such anti-counterfeiting printing, for example, pearl ink, a color change ink whose color changes depending on the viewing angle is used. This pearl ink contains thin metal particles as a pigment. The light that has been multiply reflected by the particles interferes with each other to cause a color change.

  As an example of the anti-counterfeit printed matter using the pearl ink, for example, as shown in FIG. 3, a black printed layer (31) and a pearl ink printed layer (32) are laminated in this order on a base material (30). There is a non-copyable area which is printed with black toner (33) (see, for example, Patent Document 1).

The above prior art documents are shown below.
JP 2006-218690 A

  However, with the inks with color change such as the pearl ink described above, it is difficult to produce a printed matter with the same color change due to the variation in the size of the pigment particles. Because of the large difference in recognition, it was not possible to determine authenticity by quantitatively capturing color changes and the like regardless of the observer.

  The present invention solves such problems of the prior art, and the problem is that the anti-counterfeit printed matter that prevents forgery due to copying, etc. has no variation in color change, etc., and is excellent in design. It is an object of the present invention to provide an anti-counterfeit printed matter that is easy and reliable with no difference in recognition by an observer (determining person or the like).

In order to achieve the above object in the present invention, first, in the invention of claim 1, a printed matter comprising two similar designs so as to be observed stereoscopically using the principle of stereogram, One of the two similar symbols consists of a region that reflects or absorbs only linearly polarized light in a specific direction, and the other symbol is orthogonal to the linearly polarized light that is reflected or absorbed from the region of the one symbol. It is an anti-counterfeit printed matter characterized by comprising a region that reflects or absorbs only linearly polarized light in the direction.

  According to a second aspect of the present invention, there is provided one pattern composed of a region that reflects or absorbs only the linearly polarized light in the specific direction, and linearly polarized light in a direction orthogonal to the linearly polarized light reflected or absorbed from the region of the one pattern. 2. The anti-counterfeiting according to claim 1, wherein the other pattern consisting of a region that reflects or absorbs only the light is formed by using a polarizer as at least a part of the base material and provided thereon. It is a printed matter.

  Since this invention is the above structure, there exist the following effects.

  In other words, according to the first aspect of the present invention, in a printed matter composed of two similar designs so as to be observed stereoscopically using the principle of stereogram, One of the symbols consists of a region that reflects or absorbs only linearly polarized light in a specific direction, and the other symbol reflects or reflects only linearly polarized light in a direction orthogonal to the linearly polarized light reflected or absorbed from the region of the one symbol. Since it is composed of an absorbing region, it is possible to obtain a forgery-preventing printed matter that is difficult to forge with a copying machine or the like and is excellent in design.

  According to the second aspect of the present invention, one pattern composed of a region that reflects or absorbs only linearly polarized light in a specific direction and a direction orthogonal to the linearly polarized light reflected or absorbed from the region of the one pattern. Because the other pattern consisting of the region that reflects or absorbs only the linearly polarized light of the above is made of a polarizer on at least a part of the substrate and is formed by a phase retarder provided thereon, it cannot be seen with the naked eye. It is highly secure and can be viewed three-dimensionally with polarized glasses made up of two types of linearly polarizing filters. It can be used as a forgery-proof printed material that can be applied to licenses and passports as a printed material with excellent convenience and design. .

  As a method for determining the authenticity of the anti-counterfeit printed matter according to claim 1 or 2, a linearly polarizing filter that can observe one design and cannot observe the other design is applied to one eye, and the other An authenticity determination method for determining a genuine product when viewed in a three-dimensional manner when a linearly polarizing filter that is capable of observing one of the patterns and observing one of the patterns is applied to the other eye. As a result, the authenticity of the anti-counterfeit printed matter can be easily and surely determined by eliminating the recognition difference between the observers (determinants, etc.). Can do.

  As described above, the anti-counterfeit printed matter of the present invention is obtained by observing two kinds of linearly polarizing filters on each eye and using the fact that the pattern formed there looks three-dimensional. 3D images can be recognized based on the same principle as the stereogram used in video, so it is easy to create designs and use as a design and has a wide range of uses. It is possible to use the same polarizing glasses used for the above.

Furthermore, this forgery-preventing printed matter can also be applied to personal authentication media such as licenses and passports. In this case, face photographs are taken with two cameras separated from each other by a certain distance to the left and right. The obtained face image is converted to a binary monochrome image by dithering, and a face image is formed in which the monochrome of one image corresponds to the polarized light in a specific direction, and the monochrome of the other image is orthogonal to the above image. By forming a face image corresponding to the polarized light in the direction to be moved and disposing the two images on the base material at a certain distance from each other, a personal authentication medium on which a forgery prevention measure is taken can be obtained. Further, a discriminator is prepared in which linear polarizing filters in directions orthogonal to the left and right lens portions of the glasses are attached. When the medium is observed using this discriminator, the face image formed there can be observed in three dimensions.

  Moreover, by making a company logo, a certification mark, etc. into a three-dimensional image as described above, it can also be used as a medium for brand protection, and such a medium can also perform remote authentication determination.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings.

  FIG. 1 is a schematic diagram for explaining an example of a method for determining an anti-counterfeit printed material and its authenticity according to the present invention. The invention according to claim 1 is, for example, a specific direction on a base material (1). The pattern 1 (2A) that reflects only the linearly polarized light (3A) and the pattern 2 (2B) that reflects only the linearly polarized light (3B) in the direction orthogonal to the linearly polarized light reflected from the pattern 1 (2A) are formed. Thus, a forgery prevention printed matter (10) is prepared. At this time, symbol 1 (2A) and symbol 2 (2B) are made to be similar symbols having a phase difference corresponding to parallax.

  In order to three-dimensionally observe the forgery-preventing printed matter (10), the linearly polarizing filter (4A) that transmits only the linearly polarized light (3A) reflected from the symbol 1 (2A) is displayed before the right eye (5A). In front of the left eye (5B), a linear polarization filter (4B) that transmits only the linearly polarized light (3B) reflected from the symbol 2 (2B) is placed. Thereby, only the symbol 1 (2A) is observed with the right eye, and only the symbol 2 (2B) is observed with the left eye, and the symbol is stereoscopically observed according to the principle of the stereogram.

  Moreover, the invention which concerns on the said Claim 2 forms symbols 1 and 2 (2A, 2B) by providing a phase retarder on it, using a polarizer for a part of base material (1). For example, a reflective or scattering polarizer is used as the base material (1), and on this base material, for example, a material corresponding to a function of a half wavelength is used, and the design 1 (2A) and the design 2 (2B) Can be formed, the anti-counterfeit printed matter (10) having the similar design 1 (2A) and design 2 (2B) in which the polarization directions reflected from these designs are orthogonal.

  As a method for determining the authenticity of the forgery-preventing printed matter (10) according to claim 1 or 2, for example, an instrument in which the left and right lens portions of the glasses are linearly polarizing plates in directions orthogonal to each other is prepared as a verifier. To do. When an observer wearing this spectacle-type verifier observes the anti-counterfeit printed matter (10) shown in FIG. 1, only one of the left symbols (2A) can be observed with one eye, and the right eye can be observed with the other eye. Since only the symbol (2B) can be observed, the visible symbol can be observed as a three-dimensional object by adjusting the focus of the eyes so that the symbols visible by each eye are overlapped.

  Hereinafter, a specific embodiment of the present invention will be described with reference to FIG.

An iodine PVA stretched polarizer was used as a substrate (8) by cutting so that the polarization axis was 45 degrees with respect to the horizontal axis. The rubbing process was performed on the left half of the base material (8) in a direction inclined 22.5 degrees to the left to form a rubbing region 1 (6A). Further, rubbing treatment was performed on the right half of the base material (8) in a direction inclined 22.5 degrees to the right to form a rubbing region 2 (6B). On these rubbing regions (6A, 6B), an ultraviolet curable nematic liquid crystal resin was printed by gravure printing and cured with an ultraviolet lamp to form design 1 (7A) and design 2 (7B). These symbol 1 (7A) and symbol 2 (7B) are similar symbols having a phase difference corresponding to the parallax, and are three-dimensionally recognized by a stereogram observation method.

  Further, the pattern 1 (7A) on the rubbing region 1 (6A) has an effect of rotating the polarized light reflected from the base material (8) 45 degrees to the left because the liquid crystal is aligned in the same direction as the rubbing direction. The pattern 2 (7B) on the rubbing region 2 (6B) also has the effect of rotating the polarized light reflected from the substrate (8) 45 degrees to the right because the liquid crystal is aligned in the same direction as the rubbing direction. As a result, the polarized light reflected from the pattern 1 (7A) has a horizontal polarization axis, and the polarized light reflected from the pattern 2 (7B) has a vertical polarization axis. Got.

  Furthermore, an iodine PVA stretched polarizer with a polarization direction of vertical axis was attached to the right eye portion of the glasses, and an iodine PVA stretched polarizer with a polarization direction of horizontal axis direction was attached to the left eye portion to obtain a verifier.

  When this verifier was attached to the face and the anti-counterfeit printed matter obtained above was observed, the design was visually recognized in three dimensions, and the effect of the invention was confirmed.

It is the side schematic diagram explaining the principle of the forgery prevention printed matter of this invention, and its authenticity determination method. It is a plane schematic diagram explaining one example of a forgery prevention printed matter of the present invention. It is a sectional side view explaining the example of the conventional forgery prevention printed matter.

Explanation of symbols

1 ... Base material 2A ... Pattern 1
2B ... Pattern 2
3A ... Reflected light from pattern 1 3B ... Reflected light from pattern 2 4A ... Linear polarization filter 1
4B ... Linear Polarizing Filter 2
5A ... right eye 5B ... left eye 6A ... rubbing area 1
6B ... Rubbing area 2
7A ... Pattern 1 (liquid crystal)
7B ... Pattern 2 (liquid crystal)
8. Base material (polarizer)
10 ... Anti-counterfeit printed matter

Claims (2)

  The printed matter is composed of two similar patterns so as to be observed three-dimensionally using the principle of stereogram, and one of the two similar patterns has only linearly polarized light in a specific direction. An anti-counterfeit printed matter comprising a region that reflects or absorbs, and the other design consists of a region that reflects or absorbs only linearly polarized light in a direction orthogonal to the linearly polarized light reflected or absorbed from the one design region. .   One pattern composed of a region that reflects or absorbs only linearly polarized light in the specific direction, and a region that reflects or absorbs only linearly polarized light in a direction orthogonal to the linearly polarized light reflected or absorbed from the region of the one pattern 2. The forgery-preventing printed matter according to claim 1, wherein the other design is formed by using a polarizer as at least a part of a base material and a phase retarder provided thereon.

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