JPH04179592A - Card with hologram - Google Patents

Abstract

PURPOSE:To enable protection of the intrinsic or individual information of a card from becoming forged or altered by recording information using two different types of hologram such as white light regeneration-type hologram and laser beam regeneration-type hologram. CONSTITUTION:A hologram part contains a pattern which can be regenerated under a white light source as the first information and card forgery interpretation information which can be regenerated under laser beam source as the second information. If a regeneration light 11 originating from a white light source spot light 10 is emitted to the hologram part at a specified angle, a viewer 12 recognizes a regenerated image 13. In addition, if a laser beam 14 is prjected to the hologram part at a specified angle, the viewer 15 can recognize a regenerated image 16 as an imaginary image. If an image is regenerated using a conjugate light with a reference light during hologram recording, a real image can be regenerated. If it is designed so that a laser beam-regenerated image 16 can be formed at a position away from the hologram part, the laser beam-regenerated image 16 can hardly be recognized when the image is regenerated using a white color light, and only a white light-regenerated image 13 is recognized.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a card with a hologram, and more specifically, information such as characters, symbols, figures, etc. is recorded as a hologram with different reproduction means, and the card has an effect of preventing forgery and counterfeiting. Regarding the card you have.

<Prior Art> Holography is a technique that uses the coherence of waves such as light waves to record wavefront interference fringes of light waves etc. from an object, and this recorded thing is called a hologram.

By irradiating this hologram with another light wave, the light waves from the original object are reproduced, making it possible to make an image of the original object appear, and furthermore, it is possible to reproduce a three-dimensional image.

By the way, one type of recording using holography is a relief type hologram, which records interference fringes corresponding to the wavefront of light from an object as a concave-convex pattern on the surface of an angry light material. This is to record interference fringes with a concave-convex pattern on the order of lines/mm, and the spatial frequency is determined depending on the purpose. Since the relief-type hologram has interference fringes formed in an uneven pattern, it is possible to reproduce it in large quantities using a hologram master plate.

Such holograms can be used, for example, in advertisements, displays, covers and illustrations of books and magazines as a decorative effect, and in securities, as an anti-counterfeiting effect.
It is used for credit cards, ID cards, driver's licenses, etc.

In particular, products that use holograms do not require any special equipment and can be visually detected in a short time and accurately. While affixing holograms that record patterns, marks, etc. that can be identified under a light source, card authenticity identification information unique to the card or codes that differ for each card, personal identification information such as names, card numbers, signatures, fingerprints, photographs, etc. Individual information, such as
It is recorded on the card by pasting a sticker or other means.

<Problems to be Solved by the Invention> However, in the above-mentioned cards, the embossed part is cut or re-embossed, the written signature cannot be erased or rewritten, the magnetic recording can be rewritten, and the sticker cannot be replaced. Although it is easy to do so, it has become difficult to protect card authenticity determination information unique to a card or personal identification information and individual information that differ from card to card.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a card that has the decorativeness of a hologram and the unexpectedness of a three-dimensional image, and that can protect cart specific or individual information from forgery or alteration.

Means for Solving the Problems> The present invention has been made to achieve the above object, and includes first information recorded and reproduced by a hologram that can be reproduced with a white light source, and a hologram that can be reproduced with a laser light source. This is a card with a hologram, which has a hologram section that holds second information recorded and reproduced on the same surface.

<Function> Information is held on the same surface of the hologram layer on the card by a hologram that can reproduce the first information under a white light source and a hologram that can reproduce the second information under a laser light source. By arranging pictures, designs, letters, marks, etc. as the first information, it functions as a decoration and an eye catcher due to the reproduction of three-dimensional information that does not require a special reproduction device, and the color change of the rainbow color. , the second information is card authenticity determination information,
Alternatively, different codes, names, card numbers, signatures, fingerprints, and other personal identification information and individual information can be placed on each card without affecting the reproduction of the first information, and the reproduction means is limited to a specific device. It functions as a means of determining authenticity.

<Example> Hereinafter, the present invention will be explained in detail based on embodiments of the drawings.

FIG. 1 is a plan view of a hologram-equipped card of the present invention, in which a hologram-equipped card (1) has a hologram portion (2) adhered to the surface of a card base material (3). In addition, it is possible to arbitrarily form photographs, pictures, patterns, characters, marks, etc. on the surface of the card (1) as the display part (4) by printing, transferring, engraving, laminating, pasting, etc. Furthermore, letters, symbols, etc. are embossed on the embossed part (5
).

FIG. 2 shows a partially enlarged sectional view of this hologram-equipped card (1). The hologram part (2) is formed by a transfer type hologram shown in one of the examples, and as shown in FIG.
, a light-reflecting layer (8), and a heat-sensitive adhesive layer (9), and is attached to the card base material (3) via the heat-sensitive adhesive layer (9).

Note that a protective layer may be formed on the hologram forming layer (7) if necessary.

The hologram part (2) can be formed by pasting a sheet with a hologram formed on the cart base, or by providing a recess in the card base material and fitting the sheet with a hologram therein.

In the hologram forming layer (7), both a hologram that holds the first information, such as a rainbow hologram, and a hologram that holds the second information, such as a Fresnel hologram, are recorded. Holograms include image bolograms, Linzbumann holograms, bolographic stereodulums, etc. Laser beam reproduction type holograms include Fraunhofer holograms.

The card base material (3) is made of plastic, and also includes paper, metal, etc., and laminates thereof.

The hologram can be used in either a transmitted light reproduction type or a reflected light reproduction type, and the hologram forming layer (7) is manufactured using a silver salt window optical material, and is bleached if necessary. It may also be used as a phase hologram. In addition, when producing holograms in large quantities and at low cost, photosensitive resin is used to record them as surface relief holograms, and this is used as a mother mold to create a mold for reproduction using electroforming or other methods to create minute irregularities on the surface. However, it is also possible to use this mold to press-mold a sheet or film-like resin into a relief-type hologram. Regarding the resin used, it has heat resistance that can withstand heating during hologram molding and post-molding transfer, has good embossing moldability, does not easily cause press unevenness, provides bright reproduced images, and is suitable for protective layers and light-reflecting layers. It is required to have excellent adhesion with. Examples of such resins include acrylic resins, cellulose acetate butyrate resins, nitrocellulose resins, cellulose acetate propionate resins, ethyl cellulose resins, and methyl cellulose resins having an acid value.

In the case of a reflected light reproduction type hologram, the light reflection layer (8) includes one in which a light reflective material is layered on the back surface of a transmitted light reproduction type hologram, and one in which a light reflective material is layered on the relief surface of a relief type hologram. Reflective materials mainly include metals such as Cr, Ni, Ag5Al, Fe, Cu, Co,
A light-reflecting layer (8) is formed by using Ti, etc. as a single metal, an alloy thereof, an oxide thereof, a nitride thereof, or a combination thereof by a vacuum evaporation method, a sputtering method, an ion blating method, a Menki method, etc. be done.

The heat-sensitive adhesive layer (9) can be made of acrylic resin, vinyl resin, polyester resin, urethane resin, amide resin, epoxy resin, etc.
) is adhered to the card base material (3).

The peeling layer (6) is provided on the hologram transfer foil to effectively transfer the hologram forming layer from the support film to the transferred object, and is necessary in transfer methods such as transfer type holograms. . The materials that can be used include thermoplastic acrylic resins, chlorinated rubber resins, and resins that can be used in combination with these resins, such as nitrocellulose, acetyl cellulose, cellulose acetate butyrate, polystyrene, vinyl chloride, vinyl chloride acetate resins, etc. Thermosetting resins such as melamine resins, algide resins, and epoxy resins can be used alone or in combination, and silicone resins, paraffin wax, reactive fluororesins, etc. can also be used.

When providing a protective layer, use polyester resin, which has excellent heat resistance, scratch resistance, chemical resistance, and transparency, as a protective layer.
Thermoplastic resins and thermosetting resins such as epoxy resins, urethane resins, and vinyl chloride resins can be used.

The reproduction of information recorded on the hologram section (2) formed on the card of the present invention will be described.

In the hologram section (2), first information is a picture, design, mark, etc. recorded by a hologram that can be reproduced under a white light source, and second information is recorded by a hologram that can be reproduced under a laser light source. Card authenticity determination information unique to each card, personal identification information such as a code, name, card number, signature, fingerprint, etc. that differs for each card, and individual information are formed, and the hologram under a white light source in Figure 3 As shown in the conceptual diagram showing reproduction, when the reproduction light (11) from a spotlight (lO) as a white light source is irradiated on the hologram part (2) of the card at a predetermined angle, the observer (12) The reproduced image (13) can be recognized. In addition, as shown in the conceptual diagram showing hologram reproduction under a laser light source in Figure 4, when the laser beam (14) is irradiated on the hologram part (2) of the card at a predetermined angle, the observer (15) can see the reproduction. Image (16) can be recognized as a virtual image. Although not shown in the drawings, it is also possible to reproduce a real image by using light that is conjugate with the reference beam used during hologram recording.

As described above, according to the present invention, the reproduced images (13) and (16)
can be reproduced as completely different separate images using different reproduction means. In particular, if it is designed and recorded so that the reproduced image (16) of the laser beam reproducing hologram is formed at a distance 1 from the hologram part (2), the reproduced image of the laser beam reproducing hologram when reproduced by white light. (1
6) is hardly perceivable, and the observer usually only recognizes the reconstructed image (13) using white light.

The second information may be information that only determines the authenticity of the card or individual information for each card, and depending on the selection, the method for forming the hologram may be different depending on whether it is necessary to produce the hologram individually or in large quantities. The difference is that it can be manufactured in different ways.

Next, a specific example of the present invention will be described.

A rainbow hologram in which pictures, designs, letters, marks, etc. are arranged, and a Fresnel hologram, in which pictures, designs, letters, marks, etc. are arranged for determining card authenticity unique to the card, are respectively known holograms. At the same time in the production optical system, a photoresist (AZ-1350) on the substrate was exposed to an argon laser with a wavelength of 488 nm and an exposure energy of approximately 150 mJ/cm2 to form a pattern based on the information recorded in S8.
-1350 developer was used for development at 20° C. for 11 minutes, washed with water and dried to produce a surface relief type hologram.

Using this surface relief type hologram as a master mold, a NiO mold is produced by electroforming, and the relief type hologram is duplicated using this mold by hot pressing on the urethane resin of the hologram forming layer on polyethylene terephthalate.

Approximately 500% of the resulting relief hologram was coated as a reflective layer.
A hologram transfer foil was formed by vacuum-coating aluminum to a human thickness and coating the top surface with a hydrochloride-vinyl acetate heat-sensitive adhesive to a thickness of about 2 μm.

This hologram transfer foil is thermally transferred and adhered to a predetermined position on a card to obtain a hologram-equipped card of the present invention.

This card is made of a 0.55mm thick opalescent vinyl chloride sheet with predetermined pictures, designs, characters, marks, etc. printed on the surface.
A transparent vinyl chloride sheet with a thickness of 0.1 mm is pasted on both sides and laminated by heat pressure bonding for 20 to 30 minutes at 120 to 160°C and 130 to 60 kg/cm. After cooling, it is punched out to the specified card size. be.

Effect> As described above, in the present invention, two types of holograms, a white light reproduction type rainbow hologram and a laser reproduction type hologram, are recorded in the hologram section, so that the hologram can be reproduced by reproduction means such as photographic technology or electrophotographic technology. In addition to being able to prevent counterfeiting and counterfeiting, the first information is recorded on a visually visible white light reproduction type rainbow hologram, and the laser reproduction type hologram, which cannot be recognized by normal visual means, can be used as a laser reproduction type hologram. This information is recorded as the second information.

Therefore, since the first information can be recognized under normal light sources such as sunlight or spotlights, it has the decorativeness and unexpectedness of the hologram due to its three-dimensional effect, and the second information is difficult to notice, so it can be used to determine the authenticity of the card. Information or highly confidential information such as individual card information can also be recorded. Furthermore, the reproduction means is limited to a specific device and functions as an authenticity determination means.

[Brief explanation of drawings]

FIG. 1 is a plan view of the hologram-equipped card of the present invention, FIG. 2 is a partially enlarged sectional view of the hologram-equipped card of FIG. 1, and FIG. 3 is a conceptual diagram showing hologram reproduction under a white light source. 4 is a conceptual diagram showing hologram reproduction under a laser light source. (1)・・・・・・Card with hologram (2)
・・・・・・・・・Hologram part (3)・・・・・・
・・Card base material (4) ・・・Display part (5) ・・・・Embossed part (6) ・・・・Peeling layer (7) ......Hologram forming layer (8)...
......Light reflective layer (9)...Heat-sensitive adhesive layer (10)...Spotlight (11)
...... Reproduction light (12), (15) ...... Observer (13)
, (16)... Reproduction image (14)...
...Laser light patent application Kazuo Suzuki Representative, Toppan Printing Co., Ltd. Figure 2

Claims (1)

[Claims] (1) First information recorded and reproduced by a hologram that can be reproduced with a white light source and second information that is recorded and reproduced by a hologram that can be reproduced by a laser light source are held on the same plane as the first information. A card with a hologram, characterized in that it has a hologram section.