JP3961106B2 - Image forming body, confirmation tool, and confirmation method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image forming body, a confirmation tool, and a confirmation method.
[0002]
[Prior art]
Conventionally, in order to suppress counterfeit products such as gold vouchers copied with a copying machine, counterfeiting is performed using a copying machine by providing an area composed of halftone dots with a size exceeding the resolving power of the copying machine. A copy check system has been used to identify things.
However, due to the technical progress of color copiers, the resolution of color copiers has increased, and it is difficult to sufficiently enhance the copy check effect with a method using a large halftone dot that exceeds the resolution of the copier.
[0003]
For this reason, the applicant creates a printed matter in which a hidden pattern is printed in a line pattern, and if the printed matter is a copy, the copy can be identified by the fact that the hidden pattern does not appear even if it is covered with a transparent discriminating tool. Patents relating to the object discrimination method (Japanese Patent Application No. 8-257961, Japanese Patent Application No. 8-340850) have already been filed.
In recent years, holograms that are excellent in design, difficult to duplicate the main body, and have high security have been used as a measure against color copying.
[0004]
[Problems to be solved by the invention]
However, it is not known that a hidden pattern contains a hidden pattern, but if it is known that it is a counterfeiter having a normal printing technique, it can be counterfeited relatively easily. In addition, it is difficult to increase the resolution of printed matter in terms of ensuring stable productivity.
Furthermore, with regard to the hologram, the design of the hologram itself is required only for checking the design, so that security is improved, functionality is improved, and added value is required.
[0005]
The present invention has been made in view of such problems, and an object of the present invention is to provide an image forming body, a confirmation tool, and a confirmation method capable of preventing forgery, having high security, and having excellent decorativeness. There is to do.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, the first invention is such that an interference fringe swelling film is bonded onto a hologram photopolymer photosensitive material on which an image is recorded, and a hidden pattern is formed by halftone dots or lines. A hidden pattern film in which a hidden pattern is composed of halftone dots or lines is placed and exposed on a hologram layer obtained by placing and exposing a hidden pattern film, or an interference fringe swelling film. An image forming body comprising a hologram layer bonded to a hologram photopolymer photosensitive material on which is recorded. According to a second aspect of the present invention, there is provided a confirmation method characterized by superimposing a confirmation tool having a pattern that interferes with a hidden pattern of an image forming body on the image forming body and confirming the occurrence of a moire pattern.
[0007]
According to a third aspect of the invention, an interference fringe swelling film is laminated on a hologram photopolymer photosensitive material on which an image is recorded, and a confirmation pattern film having a confirmation pattern composed of halftone dots or lines is placed. The hologram photopolymer obtained by exposure, or a film for interference fringe swelling, a confirmation pattern film in which a confirmation pattern is composed of halftone dots or lines are placed and exposed, and a photopolymer for hologram on which an image is recorded An image forming body having a hologram layer bonded to a photosensitive material.
The fourth aspect of the invention comprises a halftone dot or a line that interferes with the confirmation pattern of the image forming body of the third aspect of the invention and that has a half cycle with respect to a halftone dot or a line constituting the pattern. It is a confirmation tool characterized by having a hidden pattern that is bordered.
A fifth invention is a forgery confirmation method characterized by superimposing the confirmation tool of the fourth invention on the image forming body of the third invention and confirming the occurrence of a moire pattern.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below. FIG. 1 is an explanatory view showing a first embodiment of the present invention. In the first embodiment, a confirmation pattern forming body 1 is used as a confirmation tool. When the image forming body 3 is viewed alone, a hologram image is displayed and it is not known that there is a hidden pattern. When the confirmation pattern forming body 1 is superimposed on the image forming body 3, a moire pattern can be confirmed.
[0009]
Even if the confirmation pattern forming body 1 is overlaid on the image forming body on which the hidden pattern is not written instead of the image forming body 3, the moire pattern cannot be detected. In this way, it is possible to determine whether the image forming body is an original image forming body or a forged image forming body based on the presence / absence of moiré patterns.
[0010]
FIG. 2 is a diagram showing the configuration of the confirmation pattern forming body 1 and the image forming body 3. The image forming body 3 is configured by covering the hologram layer 5 with a protective layer 7.
The hologram layer 5 is formed by laminating a hologram photopolymer sensitive material 43 and an interference fringe swelling film 41 (FIG. 6).
[0011]
The confirmation pattern forming body 1 was printed with black ink using an offset printer using T-60 manufactured by Toray Industries, Inc. and a transparent film having a thickness of 188 μm.
The hologram layer 5 is composed of a hologram photopolymer sensitive material 43 (OmniDex 706 made by DuPont) and an interference fringe swelling film 41 (CTF 75 made by DuPont).
[0012]
The protective layer 7 is for protecting the surface of the hologram layer 5, and is produced by laminating a 50 μm thick PET film with adhesive (Lintec Fuji Clear) on the surface of the hologram layer 5.
[0013]
The image forming body 3 is used for printed matter such as cards such as ID cards and credit cards, certificates, commuter passes, gift certificates, and ID certificates.
[0014]
FIG. 3 is an enlarged view of the confirmation area 15 of the hidden pattern printed on the hidden pattern film 11. The confirmation region 15 includes a confirmation pattern portion 17, a pattern border portion 19, and a background region 21.
[0015]
The manufacturing method of the hidden pattern film 11 is created by drawing and developing with a laser in the same manner as in ordinary plate making. The confirmation area 15 on the hidden pattern film 11 is composed of lines. The confirmation area 15 may be constituted by halftone dots.
[0016]
FIG. 4 is an enlarged view of the area 23 in the confirmation area 15. The confirmation pattern portion 17 has a regular pattern that is a repetition of black stripes that are 45 degrees to the right and are evenly spaced by 100 μm. The pattern border 19 is provided around the confirmation pattern 17 with a width of 1 mm, and has a pattern that is shifted from the pattern of the confirmation pattern 17 by a half cycle.
[0017]
Since the background area 21 is configured to have substantially the same halftone density with respect to the confirmation pattern portion 17 and the pattern border portion 19, it cannot be visually determined that there is a hidden pattern in the confirmation pattern portion.
[0018]
FIG. 5 is an enlarged view of a confirmation region 31 having a pattern similar to that of the confirmation region 15 of FIG. The confirmation region 31 includes a confirmation pattern portion 35, a pattern border portion 37, and a background region 39.
[0019]
Here, the confirmation pattern portion 35 has a regular pattern that is a repetition of black stripes that are 45 degrees to the right and are evenly spaced by 100 μm. The pattern edging portion 37 is provided around the confirmation pattern portion 35 and has a pattern shifted from the pattern of the confirmation pattern portion 35 by a half cycle. The pattern border 37 is preferably provided in consideration of the sharpness of the moire pattern when the confirmation tool is placed, but it may not be attached.
[0020]
The background region 39 has substantially the same density as the confirmation pattern portion 35 and the pattern border portion 37. Here, a stripe that is 45 degrees left is used, but the angle and color of the stripe can be freely determined.
[0021]
Next, the manufacturing process of the hologram layer 5 is demonstrated using FIG. First, a hologram image is taken on the hologram photopolymer photosensitive material 43.
[0022]
To capture a hologram image, irradiate the object to be imaged with highly coherent light such as laser light, and reference the object light directly reflected from the object to be imaged and the irradiation position with a half mirror etc. Interference fringes generated by light are recorded in the hologram photopolymer photosensitive material 43.
After photographing the hologram image, the hologram photopolymer photosensitive material 43 records the hologram image as interference fringes.
[0023]
Next, the confirmation area 15 or the confirmation area 31 as shown in FIG. 3 or 5 is created on the hidden pattern film 11.
[0024]
Subsequently, the interference fringe swelling film 41 is adhered to the hologram photopolymer photosensitive material 43 to form the hologram layer 5, and the hidden pattern film 11 is placed on the interference fringe swelling film 41 of the hologram layer 5, Ultraviolet rays are irradiated from the hidden pattern film 11 side.
FIG. 6 is a diagram in which the hidden pattern film 11 is placed on the interference fringe swelling film 41 and irradiated with ultraviolet rays.
[0025]
The hidden pattern film 11 has confirmation regions 15 and 31 as shown in FIG. 3 or FIG. 5, and the confirmation region is composed of lines. The black portions of the lines on the hidden pattern film 11 do not pass ultraviolet rays, but the transparent portions pass ultraviolet rays, and the ultraviolet rays are incident on the interference fringe swelling film, and the ability of the interference fringe swelling film 41 is lost.
[0026]
After the above exposure processing is completed, the hologram layer 5 is subjected to heat treatment to promote interference fringe swelling.
When the hologram layer 5 is subjected to heat treatment, the interval between the interference fringes is widened in the portion where the ultraviolet rays are not passed, whereas the original interval between the interference fringes of the hologram image is maintained in the portion where the ultraviolet rays are passed.
That is, the hologram layer 5 records the hidden pattern as a portion where the interval between the interference fringes in the hologram image is unchanged and a portion where the interval between the interference fringes is widened.
[0027]
FIG. 7 is an enlarged view of the confirmation pattern forming body 1. The confirmation pattern forming body 1 is made of a light-transmitting film or the like, and the confirmation pattern forming body 1 is configured by a stripe similar to the stripe of the confirmation pattern portion 35, and interferes with the confirmation pattern portion 35 and the pattern border portion 37. It does not interfere with the region 39.
Here, the manufacturing method of the confirmation pattern formation body 1 has the method of creating by printing, and the method of utilizing a platemaking film.
In addition, after placing the hidden pattern film 11 in which the hidden pattern is formed with halftone dots or lines on the interference fringe swelling film 41 and exposing it, the film is bonded to the hologram photopolymer photosensitive material 43 on which the image is recorded. Thus, the hologram layer 5 may be formed.
[0028]
FIG. 8 is an explanatory diagram when the confirmation pattern forming body 1 is placed on the image forming body 3. The confirmation pattern portion 35 interferes with the stripe of the confirmation pattern forming body 1 and becomes completely black. Further, the pattern border portion 37 interferes with the stripe of the confirmation pattern forming body 1 and becomes lighter gray than the background region 39. Since the background area 39 does not interfere with the confirmation pattern forming body 1, the gray level does not change.
Therefore, a black moire pattern with white borders emerges. In the case of FIG. 4, a black letter A with a white border appears.
[0029]
FIG. 9 shows an explanatory diagram when the confirmation pattern forming body 1 is placed on the image forming body 3 with a half cycle shift from the case of FIG. It interferes with the stripe and becomes lighter gray than the background area 39. Further, the pattern edge portion 37 interferes with the stripe of the confirmation pattern forming body 1 and becomes completely black. Since the background area 39 does not interfere with the confirmation pattern forming body 1, the gray level does not change.
Therefore, a white moire pattern with black borders emerges. In the case of FIG. 4, a white letter A with a black border appears.
[0030]
FIG. 10 is a diagram illustrating an example in which the image forming body 3 is provided on the ID card 51. In addition to the image forming body 3a, the ID card 51 is provided with a face photograph 53 and the like.
In this state, when the ID card 51 is viewed with the naked eye, the hologram image recorded on the image forming body 3a can be confirmed.
[0031]
FIG. 11 is a diagram in which the confirmation pattern forming body 1 is placed on the ID card 51 of FIG. The ID card 51 in which the hologram image can be confirmed in FIG. 10 and the hidden pattern letter A can be confirmed in the state of FIG. 11 is proved to be the original ID card 51. However, even if the hologram image can be confirmed in FIG. 10, if there is an ID card 51 in which the hidden pattern letter A cannot be confirmed in the state of FIG.
[0032]
As described above, according to the present embodiment, by using the confirmation pattern forming body 1 as a confirmation tool, the original ID card 51 and the forged ID card can be checked by a simple method.
[0033]
Next, a second embodiment will be described.
FIG. 12 is a diagram illustrating a configuration of a hidden pattern forming body 61 and an image forming body 63 as confirmation tools in the second embodiment. In the second embodiment, the image forming body 63 is configured by covering the hologram layer 65 on which the confirmation pattern is recorded with a protective layer 67.
[0034]
Here, the pattern of the confirmation pattern forming body 1 of the first embodiment is formed on the hologram layer 65, and the pattern of the hidden pattern film 11 of the first embodiment is formed on the hidden pattern forming body 61. Is done. The second embodiment also has the same effect as the first embodiment.
Further, the image forming bodies according to the first and second embodiments described above have high decorativeness and can be used for toys, novelties, premiums, packaging materials, books, and the like.
[0035]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an image forming body, a confirmation tool, and a confirmation method that can prevent forgery, have high security, and are excellent in decorativeness.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a first embodiment of the present invention. FIG. 2 is a diagram showing a configuration of a confirmation pattern forming body 1 and an image forming body 3. FIG. 3 is a hidden pattern printed on a hidden pattern film 11. FIG. 4 is an enlarged view of the area 23 in the confirmation area 15. FIG. 5 is a confirmation area of a design that has a pattern similar to the confirmation area 15 in FIG. [Fig. 6] Fig. 6 is a diagram in which the hidden pattern film 11 is placed on the interference fringe swelling film 41 and is irradiated with ultraviolet rays. [Fig. 7] An enlarged diagram of the confirmation pattern forming body 1. [Fig. FIG. 9 is an explanatory diagram when the confirmation pattern forming body 1 is placed on the region 31. FIG. 9 is an explanatory diagram when the confirmation pattern forming body 1 is placed on the confirmation region 31 with a half-cycle shift from the case of FIG. FIG. 10 shows an example in which the image forming body 3 is provided on the ID card 51. FIG. 11 is a diagram in which the confirmation pattern forming body 1 is placed on the ID card 51 of FIG. 10. FIG. 12 is a diagram showing the configuration of the hidden pattern forming body 61 and the image forming body 63 in the second embodiment. Explanation of]
DESCRIPTION OF SYMBOLS 1 ......... Confirmation pattern formation body 3, 3a, 63 ......... Image formation body 7, 67 ......... Protective layer 5, 65 ......... Hologram layer 11 ......... Hidden pattern film 41 ......... For interference fringe swelling Film 43... Photopolymer photosensitive material for hologram 61.

Claims (8)

  It is obtained by laminating a film for swelling interference fringes on a photopolymer photosensitive material for hologram on which an image is recorded, and further placing and exposing a hidden pattern film in which a hidden pattern is composed of halftone dots or lines. A hidden pattern film in which a hidden pattern is formed with halftone dots or lines is placed on the hologram layer or the interference fringe swelling film, exposed, and bonded to the hologram photopolymer photosensitive material on which the image is recorded. An image forming body comprising a hologram layer.   The image forming body according to claim 1, wherein the hologram layer is a volume hologram.   The image forming body according to claim 1, wherein the hidden pattern is bordered by halftone dots or lines whose period is half a period with respect to halftone dots or lines constituting the pattern. A confirmation method comprising: superimposing a confirmation tool having a pattern that interferes with a hidden pattern of the image forming body on the image forming body according to claim 1 and confirming the occurrence of a moire pattern.     It is obtained by laminating a film for swelling interference fringes on a photopolymer photosensitive material for hologram on which an image is recorded, and further placing and exposing a confirmation pattern film in which a confirmation pattern is composed of halftone dots or lines. Placed on a hologram layer or interference fringe swelling film, a confirmation pattern film having a confirmation pattern composed of halftone dots or lines and exposed to light, and bonded to a hologram photopolymer photosensitive material on which an image was recorded An image forming body comprising a hologram layer. The image forming body according to claim 5 , wherein the hologram layer is a volume hologram. 6. A border composed of halftone dots or lines that are half-cycled from halftone dots or lines that interfere with the confirmation pattern of the image forming body according to claim 5 and that constitute a picture. A confirmation tool characterized by having a hidden pattern . A confirmation method comprising superimposing the confirmation tool according to claim 7 on the image forming body according to claim 5 and confirming the occurrence of a moire pattern.

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