JPH0895478A - Forgery preventive body, articles having the body and their production - Google Patents

Abstract

PURPOSE: To record information of a quantity sufficient for preventing forgery and to obtain an effect of preventing forgery without degrading the quality of an image reconstructed by white light by constituting the article of an achromatic hologram on which prescribed information pattern images to be reconstructed only by the monochromatic light are recorded. CONSTITUTION: An achromatic hologram is used and data is inserted perpendicularly into the part of a master hologram. The achromatic hologram eliminates the blur of the images by the white light by forming a hologram having no parallaxes in the perpendicular direction at the hologram of a first step and recording the hologram further on the hologram. The master hologram has only the information in the longitudinal direction and, therefore, the images of various colors are visible in superposition to an observer but since the same images are superposed on each other, the image blur does not arise. Colors change to rainbow colors in the rainbow hologram when the observer vertically moves the visual point but in the achromatic hologram, the various colors mix and, therefore, the images are observed in nearly a gray color.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-counterfeit body composed of an achromatic hologram capable of recording a sufficient amount of information for preventing forgery without deteriorating the quality of a reproduced image by white light. The present invention relates to an article such as a credit card, a cash card, a pass ticket, an entrance ticket, etc., which has an anti-counterfeiting effect, and a manufacturing method thereof.

[0002]

2. Description of the Related Art In recent years, it has become common for payments such as credit cards, cash cards, and prepaid cards to be paid.
And as a measure to prevent forgery of these securities,
For example, various means such as high coercive force magnetic recording, attachment of hologram foil to a medium, use of special ink, and magnetic shield have been implemented.

However, the effect of such conventional security measures is being diminished at present.

On the other hand, it is necessary to judge whether or not the securities such as cards are valid, and whether or not the holder of the securities is valid. For example, if the magnetic data of the cash card is falsified and rewritten to the data in the name of another person, it is possible to illegally use the cash dispenser as long as the password can be entered.

When a used card is prepared as a prepaid card that does not specify the user and a dead copy of magnetic data is performed, the card becomes valid,
It will have the same value as a valid card.

Further, it is a reality that the securities can be relatively easily copied by color copying and digital printing in recent years.

Therefore, recently, in order to prevent such data tampering and illegal use, for example, "JP-A-63-63"
As disclosed in Japanese Patent No. 168397, a technique has been proposed in which a pattern is provided on a slit of a rainbow hologram so as to obtain a forgery preventing effect.

That is, this is because when some data is inserted in the slit portion of the rainbow hologram and reproduced with white light, the image (pattern) of the hologram can be observed, and when reproduced with monochromatic light, By reading the real image of the slit, it is verified whether it is a counterfeit product.

However, in such a forgery prevention method, when data is inserted into the slit portion of the rainbow hologram, the brightness of the image may differ depending on the viewpoint position, and the image quality of the pattern reproduced with white light is degraded. There is a problem to let. Therefore, it becomes necessary to strictly control the light shield cross-section area and the like.

However, when the width of the slit of the rainbow hologram is narrow in the vertical direction and the light shield cross-sectional area is constant, sufficient information cannot be recorded.

As described above, when information is inserted into the slit portion of the rainbow hologram, it is difficult to record information sufficient for preventing forgery without degrading the image quality of the reproduced image by white light.

[0012]

As described above, in the conventional anti-counterfeiting method, it is difficult to record sufficient information for anti-counterfeiting without degrading the image quality of the reproduced image by white light. was there.

An object of the present invention is to prevent anti-counterfeiting which is an achromatic hologram capable of recording a sufficient amount of information for anti-counterfeiting and achieving an anti-counterfeiting effect without deteriorating the quality of a reproduced image due to white light. It is intended to provide a body, an article provided with the body, and a method for manufacturing them.

[0014]

In order to achieve the above-mentioned object, first, an anti-counterfeit body according to the invention according to claim 1 is
It is composed of an achromatic hologram in which a predetermined information pattern image reproduced only with monochromatic light is recorded.

The anti-counterfeit body according to the second aspect of the invention is composed of an achromatic hologram in which an information pattern image is recorded by a modulation component in the vertical direction which is reproduced only by monochromatic light.

On the other hand, the article according to the invention of claim 3 is
An anti-counterfeit body composed of an achromatic hologram having a predetermined information pattern image reproduced only by monochromatic light is provided at a predetermined portion of the article body.

The article of the invention according to claim 4 is
An anti-counterfeit body made of an achromatic hologram in which an information pattern image is recorded at a predetermined portion of the article body by a modulation component in the vertical direction reproduced only by monochromatic light.

On the other hand, in the method for manufacturing an anti-counterfeit body according to the fifth aspect of the present invention, when the second step of photographing an achromatic hologram is performed, first, the reproduction light of the master hologram is formed into a predetermined pattern. After the modulation, the reproduced light thus modulated is used as object light to form an achromatic hologram.

In the method for manufacturing an anti-counterfeit body according to the sixth aspect of the present invention, when the second step of photographing an achromatic hologram is performed, first, the reproduction light of the master hologram is modulated in the vertical direction only. The light is modulated into a predetermined pattern, and then the reproduced light thus modulated is used as object light to form an achromatic hologram.

Further, in the method for manufacturing an anti-counterfeit body according to the invention as defined in claim 7, when the first step of photographing an achromatic hologram is performed, first, the object light is modulated into a predetermined pattern, and then the In addition, a master hologram is formed by using the modulated object light, and then an achromatic hologram is formed by using the master hologram.

Furthermore, in the method for manufacturing an anti-counterfeit body according to the present invention, when the first step of photographing an achromatic hologram is performed, first, the object light has a predetermined modulation component only in the vertical direction. The pattern is modulated, then the modulated object light is used to form a master hologram, and thereafter, the master hologram is used to form an achromatic hologram.

On the other hand, in the method for manufacturing an article according to the ninth aspect of the invention, when the second step of photographing an achromatic hologram is performed, first, the reproduction light of the master hologram is modulated into a predetermined pattern. Next, an achromatic hologram is formed by using the modulated reproduction light as object light, and then an anti-counterfeit body made of an achromatic hologram is fixed to a predetermined portion of the article body by a fixing means.

In the method of manufacturing an article according to the tenth aspect of the present invention, when the second step of photographing an achromatic hologram is performed, first, the reproduction light of the master hologram has a predetermined modulation component only in the vertical direction. Pattern
Then, the modulated reproduction light is used as object light to form an achromatic hologram, and then an anti-counterfeit body made of an achromatic hologram is fixed to a predetermined portion of the article body by a fixing means. I am trying.

Further, in the method of manufacturing an article according to the invention of claim 11, when the first step of photographing an achromatic hologram is performed, first, the object light is modulated into a predetermined pattern, and then, A master hologram is formed by using the modulated object light, then an achromatic hologram is formed by using the master hologram, and then an anti-counterfeit body made of an achromatic hologram is attached to a predetermined part of the article body. It is fixed by the fixing means.

Further, in the method of manufacturing an article according to the invention of claim 12, when the first step of photographing an achromatic hologram is performed, first, a predetermined pattern having a modulation component of the object light only in the vertical direction is first formed. Modulated into
Next, a master hologram is formed by using the modulated object light, then an achromatic hologram is formed by using the master hologram, and then an anti-counterfeit body made of an achromatic hologram is attached to the article body. It is designed to be fixed to a predetermined place by a fixing means.

[0026]

Therefore, the anti-counterfeiting body of the present invention is an achromatic hologram recorded with a predetermined information pattern image reproduced only by monochromatic light, or a vertical modulation only reproduced by monochromatic light. When the image is reproduced with white light because it consists of an achromatic hologram in which the information pattern image of the components is recorded, the components of each color spread in the vertical direction and the contents of the information pattern are blurred, so It cannot be sensed at all, and a stereoscopic image or the like can be observed as a general achromatic hologram.

Further, when reading information, when illuminating with monochromatic light such as laser light, a real image of the information pattern is formed in the space, so this real image is visually observed, or a photo sensor, a CCD sensor, etc. By using the light sensing element of
Can read the information pattern.

Further, an object illuminated by white light is subjected to an information pattern by a wavelength selective filter, a wavelength selective mirror, or the like.
The information can also be read by removing the blur of the image.

As described above, it is possible to record a sufficient amount of information for preventing forgery without deteriorating the quality of the reproduced image due to white light.

On the other hand, the anti-counterfeit body of the present invention may be any article (for the purpose of anti-counterfeiting, as long as the information is not known to a third party, for example, cash card, credit card, etc.). Cards such as Do and Blippay cards
Cards, gift certificates, stock certificates, stamps, stamps and other securities, cash vouchers, watches, electric appliances, video tapes, computer software, rackets and other branded goods, passbooks, passports, licenses, important The effect of preventing forgery of the article can be achieved by fixing it to a predetermined portion (such as a document) by a fixing means.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention uses an achromatic hologram instead of the above-mentioned conventional rainbow hologram, and by inserting data vertically into the master hologram portion of this achromatic hologram,
It is intended to record information sufficient for preventing forgery without deteriorating the quality of a reproduced image due to white light.

Embodiments of the present invention based on the above concept will be described below in detail with reference to the drawings.

First, what is an achromatic hologram?
It is as shown below.

That is, when the rainbow hologram is reproduced with white light, as shown in FIG. 1, the real images of the slits are reproduced separately for each color in the vertical direction.

The rainbow hologram is a method of eliminating the blur of the image by eliminating the parallax in the vertical direction by the slit as described above.

On the other hand, in the achromatic hologram, instead of cutting out the parallax component in the vertical direction with a slit like a rainbow, a hologram having no parallax in the vertical direction is created in the hologram of the first step, and the hologram is further processed. This is a method of eliminating the blurring of the image due to white light by recording on a hologram.

Since the master hologram has only vertical information, the observer sees images of various colors in an overlapping manner as shown in FIG. Absent. In the rainbow hologram, the color changes to rainbow when the observer moves up and down, but in the achromatic hologram, various colors are mixed, so that the color is almost gray.

Next, there are various methods for creating a master hologram having no parallax in the vertical direction, for example, a method using a holographic stereogram.

The holographic stereogram is a method of displaying a stereoscopic image by synthesizing a two-dimensional image obtained by photographing a subject from various directions into one hologram. Then, generally, the holographic stereogram combining optical system is as shown in FIG.

That is, the original image photographic sequence is sequentially projected onto the transmission diffusion screen and recorded on the photosensitive material while moving the slit. At this time, the horizontal information recorded in the original image photograph row is recorded on the hologram, but the same image is recorded in the vertical direction.

As shown in FIG. 2, when reproducing an achromatic hologram, the real image of the master hologram of each color is reproduced with an inclination. Therefore, in order to eliminate the blur caused by the deviation of the real image position during reproduction, the photosensitive material is It is desirable to tilt and shoot. A method of obtaining the tilt angle α in this case will be described later. However, in order to simplify the optical system,
Even if the image is taken without tilting the photosensitive material, the reproduced image at the time of reproducing white light is slightly blurred, but the image can be sufficiently observed, and therefore the tilt angle of the photosensitive material of the image is not limited to this. Not a thing.

By the way, in this embodiment, when the achromatic hologram is photographed from the master hologram for the achromatic hologram, the image quality of the hologram image at the time of reproduction by white light is lowered by inserting information in the vertical direction. Allows forgery prevention information to be entered without prompting.

Specifically, the following method is used.

That is, a master hologram without vertical parallax is reproduced and an achromatic hologram is recorded on the photosensitive material. At this time, the inclination of the master hologram becomes equal to the inclination angle of the master hologram at the time of photographing shown in FIG.

This optimum angle α can be obtained as follows.

That is, as shown in FIG. 4, when the angle of the reference light is θ, tan (α) = sin (θ).

The master hologram may be tilted at this angle α. However, in order to simplify the optical system, the master hologram does not have to be tilted as long as some blur can be allowed, and the angle is not limited to this.

Now, the reproduction light of the master hologram is modulated by a predetermined information pattern, and information for preventing forgery is recorded in the reproduction light. At this time, the information to be recorded in the information pattern is a pattern that is modulated only in the vertical direction.
By recording the image, even when the observer changes the position of the viewpoint when reproducing with white light, the brightness of the image changes rapidly due to the shooting of the information pattern, causing the observer to feel flicker. Absent.

As described above, by recording the interference fringes of the reproduction light and the reference light which are modulated by the information pattern on the photosensitive material, it is possible to obtain an achromatic hologram having anti-counterfeit information.

On the other hand, in the above, as the information pattern, the following can be considered.

That is, basically, as shown in FIG.
As shown in (b) and (c), it is desirable to record information by modulating only in the vertical direction, but the present invention is not limited to this, and shown in FIGS. 5 (d), (e), and (f), respectively. As described above, it is possible to record information such that the information is slightly horizontal.

The information pattern shown in FIG. 5B is for recording information using multi-level densities.

Next, the anti-counterfeiting body of the present embodiment configured as described above uses an achromatic hologram recorded with a predetermined information pattern image reproduced only with monochromatic light, or with monochromatic light only. When reproduced with white light, the components of each color spread in the vertical direction and the information pattern is reproduced by the achromatic hologram in which the information pattern image is recorded by the modulated component in the vertical direction only. Since the contents of the above are blurred, they cannot be perceived by an observer at all, and a stereoscopic image or the like can be observed as a general achromatic hologram.

Further, when reading information, when illuminating with monochromatic light such as laser light, a real image of the information pattern is formed in a space, so that this real image is visually observed, or a photo sensor, a CCD sensor, or the like. By using the light sensing element of
Can read the information pattern.

Further, an object illuminated by white light is subjected to an information pattern by a wavelength selective filter, a wavelength selective mirror or the like.
The information can also be read by removing the blur of the image.

As described above, it is possible to record a sufficient amount of information for preventing forgery without deteriorating the image quality of the reproduced image due to white light.

On the other hand, if an anti-counterfeit body made of the achromatic hologram of the present embodiment is used as an article (for the purpose of preventing forgery, or if the information is not known to a third party,
Anything can be used, for example, cards such as cash card, credit card, blipay card, securities such as gift certificates, stock certificates, stamps, stamps, cash vouchers, watches,
Forgery of goods by fixing it to a specified place of electronic products, video tapes, computer software, branded products such as rackets, passbooks, passports, licenses, important documents etc.) A preventive effect can be achieved.

FIG. 6 is a sectional view showing a state in which an anti-counterfeit body made of the achromatic hologram of this embodiment is provided on an article.

That is, as shown in FIG. 6, the anti-counterfeiting body 3 made of the achromatic hologram 2 is fixed to a predetermined portion of the surface of the article 1 by a fixing means such as an adhesive layer 4.

The anti-counterfeit body made of the achromatic hologram of this embodiment may be a transmission hologram or a reflection hologram. Further, when a photosensitive material such as a photoresist that causes surface irregularities depending on the intensity of light is used, a stamper is created from the exposed hologram,
By copying the irregularities on the resin surface, mass production becomes possible. Further, by providing a total reflection layer or a partial reflection layer on the uneven surface, it becomes possible to utilize the diffracted light due to reflection. Also, by providing an adhesive layer on the back of these resins, it can be used as a sticker, and by forming the resin into a foil shape,
It is also possible to hot stamp on other substrates.

As described above, the anti-counterfeit body according to the present embodiment is an achromatic hologram recorded with a predetermined information pattern image reproduced only by monochromatic light, or a vertical hologram reproduced only by monochromatic light. Since it is composed of an achromatic hologram in which an information pattern image is recorded with a modulation component in only the direction, a sufficient amount of information is recorded to prevent counterfeiting without degrading the image quality of the reproduced image with white light. It becomes possible to do.

If an anti-counterfeit body made of the achromatic hologram of the present embodiment is used as an article (for the purpose of preventing forgery, or if the information is not known to a third party,
Anything can be used, for example, cards such as cash card, credit card, blipay card, securities such as gift certificates, stock certificates, stamps, stamps, cash vouchers, watches,
Electrical products, video tapes, computer software, branded products such as rackets, passbooks, passports, licenses, important documents, etc.) It is possible to prevent the forgery of the article.

The present invention is not limited to the above embodiment, but can be implemented in the same manner as described below.

(A) In the above embodiment, the case where the method of using a holographic stereogram is used to capture a master hologram having no parallax in the vertical direction has been described, but the present invention is not limited to this. The master hologram may be photographed by using a horizontal slit similarly to the hologram, and moving the photosensitive material in the vertical direction while changing the incident angle of the reference light to photograph a plurality of times. .

(B) In the above embodiment, the information pattern is
Although the case of arranging the master hologram at an angle similar to that of the master hologram has been described, the present invention is not limited to this. For example, as shown in FIG. 6, it is not necessary to dispose immediately after the position of the master hologram. You don't have to.

(C) In the above embodiment, the case where the information pattern is recorded at the time of photographing the achromatic hologram has been described, but the present invention is not limited to this. For example, as shown in FIG. 7, the recording of the master hologram is performed. At times, information may be inserted.

(D) In the above embodiment, the case where the pattern as shown in FIG. 5 is used as the information pattern has been described, but the present invention is not limited to this and, for example, a bar code pattern. By using a commercially available device and software such as software, the cost of the reading device can be reduced.

(E) In the above embodiment, the case where a rectangular pattern is used as the information pattern has been described. However, the information pattern is not limited to this, and the information pattern may have, for example, a wavy shape or a barrel shape. You may make it use the existing pattern.

[0069]

As described above, according to the present invention, an achromatic hologram recorded with a predetermined information pattern image reproduced only with monochromatic light or a vertical direction reproduced only with monochromatic light. Information pattern with only modulation component
The anti-counterfeiting body is composed of an achromatic hologram on which an image is recorded, and the anti-counterfeiting body is used in a predetermined part of an article (for the purpose of preventing forgery and for not giving information to a third party). In addition, since it is fixed by the fixing means, it is possible to record an amount of information sufficient for preventing forgery without deteriorating the image quality of a reproduced image due to white light, and to achieve an anti-counterfeit effect. It is possible to provide an anti-counterfeit body including the article, an article including the article, and a method for manufacturing the article.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining an achromatic hologram applied to the present invention.

FIG. 2 is a schematic diagram for explaining a state when observing the achromatic hologram.

FIG. 3 is a schematic diagram showing an example of a holographic stereogram combining optical system used to create the achromatic hologram.

FIG. 4 is a schematic diagram for explaining an inclination angle of a master hologram in the holographic stereogram combining optical system.

FIG. 5 is a plan view showing an example of an information pattern applied to the present invention.

FIG. 6 is a sectional view showing a state where an anti-counterfeit body made of an achromatic hologram according to the present invention is provided on an article.

FIG. 7 is a schematic diagram for explaining an arrangement example of information patterns according to the present invention.

FIG. 8 is a schematic diagram for explaining another arrangement example of information patterns according to the present invention.

[Explanation of symbols]

1 ... Article, 2 ... Achromatic hologram, 3 ... Anti-counterfeit, 4 ... Adhesive layer.

Claims (12)

[Claims] 1. An anti-counterfeit body comprising an achromatic hologram recorded with a predetermined information pattern image reproduced only by monochromatic light. 2. An anti-counterfeit body comprising an achromatic hologram recorded with an information pattern image by a modulation component in the vertical direction reproduced only by monochromatic light. 3. An article, wherein an anti-counterfeit body made of an achromatic hologram in which a predetermined information pattern image reproduced by only monochromatic light is recorded is provided at a predetermined portion of the article main body. 4. An anti-counterfeit body made of an achromatic hologram having an information pattern image recorded by a modulation component in the vertical direction reproduced only by monochromatic light is provided at a predetermined portion of the article body. Articles to be. 5. When performing the second step of photographing an achromatic hologram, first, the reproduction light of the master hologram is modulated into a predetermined pattern, and then the modulated reproduction light is converted into an object light. A method of manufacturing an anti-counterfeit body, characterized in that an achromatic hologram is formed as the above. 6. When the second step of photographing an achromatic hologram is performed, first, the reproduction light of the master hologram is modulated into a predetermined pattern having a modulation component only in the vertical direction, and then, A method for manufacturing an anti-counterfeit body, characterized in that an achromatic hologram is formed by using the modulated reproduction light as object light. 7. When performing the first step of photographing an achromatic hologram, first, the object light is modulated into a predetermined pattern, and then the master hologram is formed by using the modulated object light. A method for manufacturing an anti-counterfeit body, which is characterized in that it is formed, and thereafter, an achromatic hologram is formed by using the master hologram. 8. When performing the first step of photographing an achromatic hologram, first, the object light is modulated into a predetermined pattern having a modulation component only in the vertical direction, and then the modulated object is modulated. A method for producing an anti-counterfeit body, characterized in that a master hologram is formed by using light, and then an achromatic hologram is formed by using the master hologram. 9. When the second step of photographing an achromatic hologram is performed, first, the reproduction light of the master hologram is modulated into a predetermined pattern, and then the modulated reproduction light is converted into an object light. The method for producing an article is characterized in that an achromatic hologram is formed as above, and then the forgery preventing body made of the achromatic hologram is fixed to a predetermined portion of the article body by a fixing means. 10. When the second step of photographing an achromatic hologram is performed, first, the reproduction light of the master hologram is modulated into a predetermined pattern having a modulation component only in the vertical direction, and then, An achromatic hologram is formed by using the modulated reproduction light as object light, and thereafter, an anti-counterfeit body made of the achromatic hologram is fixed to a predetermined portion of the article body by a fixing means. Article manufacturing method. 11. When photographing the first step of an achromatic hologram, first, the object light is modulated into a predetermined pattern, and then the master hologram is formed by using the modulated object light. Then, an achromatic hologram is formed by using the master hologram, and then the forgery preventing body made of the achromatic hologram is fixed to a predetermined portion of the article body by a fixing means. And a method for manufacturing an article. 12. When performing the first step of photographing an achromatic hologram, first, the object light is modulated into a predetermined pattern having a modulation component only in the vertical direction, and then the modulated object is modulated. A master hologram is formed by using light, then an achromatic hologram is formed by using the master hologram, and then an anti-counterfeit body made of the achromatic hologram is fixed to a predetermined part of the article body. A method for manufacturing an article, characterized in that it is fixed by means.