JP2003248415A - System for manufacturing waveguide hologram type forgery preventive seal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the secrecy of information to be recorded on a waveguide hologram type forgery preventive seal. <P>SOLUTION: The system for manufacturing the waveguide hologram type forgery preventive seal formed by a plane type optical waveguide of a single mode, is provided with a computer 101 which is inputted with the original information for forgery prevention and forms the recording information for forming the hologram from the original information, a computer 102 which receives the recording means through communication lines, and an electronic beam exposure device 103 which forms the hologram in the plane type optical waveguide of the single mode based on the recording information. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for manufacturing a waveguide hologram type anti-counterfeiting seal, and more particularly to a waveguide hologram type anti-counterfeiting seal having improved confidentiality of information recorded on the waveguide hologram type anti-counterfeiting seal. The present invention relates to a manufacturing system for anti-counterfeit seals.

[0002]

2. Description of the Related Art Conventionally, bills, credit cards, passports, licenses, insurance cards, various membership cards, and the like that require advanced technology for manufacturing are attached to prevent forgery. For example, watermarks and micro characters are known for banknotes, and holograms are known for credit cards. These anti-counterfeiting methods are applied when manufacturing banknotes and credit cards, and therefore are applied when a large number of identical products are manufactured.

In order to prevent counterfeiting by, for example, attaching a seal to each manufactured article, it is desirable to meet the following criteria. a) It is extremely difficult to counterfeit b) It can be manufactured at low cost by a legitimate manufacturer c) It is easy to determine the authenticity d) It can be easily pasted and cannot be reused after peeling e) The ability to change the level of safety according to the degree of importance

On the other hand, a hologram information recording medium is known as a recording medium which is difficult to forge and has a large storage capacity. For example, the hologram information recording medium described in Japanese Patent Laid-Open No. 11-345419 will be described. Figure 1
The structure of a conventional hologram information recording medium is shown in FIG. The hologram information recording medium 1 includes a clad 2-1 and a core 2-1.
/ Clad 2-2 / Core 3-2 /.../ Clad 2-n
It has a periodic layer structure in this order. Any of the clad / core / clad units is a single-mode planar optical waveguide at the wavelength of the laser light 5 used.

At least one end face of the superposed planar optical waveguides is a reflecting surface 4 having an angle of 45 ° with respect to a direction (normal direction) perpendicular to the waveguide plane. The focal point of the reproducing laser beam 5 is 45 degrees of the target waveguide.
The position of the convex lens 6 is adjusted so that the convex lens 6 is coupled to the core layer portion that is cut at a degree. The guided light 7 is partially scattered by the scattering factor (hologram) 8 provided in the core layer or the cladding layer and leaks out of the waveguide. However, if the scattering factor 8 has a periodic structure, There is a direction in which the phases of the scattered light from the scattering factors match, and the diffracted light 9
The light also travels out of the waveguide to become diffracted light 9
Thus, the hologram image 10 is formed. Information can be read by capturing this hologram image with a two-dimensional photodetector such as a charge-coupled device, so-called CCD.

[0006]

Using such a hologram information recording medium, a waveguide hologram type anti-counterfeiting seal is prepared and attached to an article by a transparent cover seal. The anti-counterfeiting method with the waveguide hologram type anti-counterfeiting seal can meet all of the above criteria.
However, since the hologram manufacturing technology is not a technology that can be monopolized by a limited number of institutions, if the information recorded in the waveguide hologram leaks, the waveguide hologram forgery prevention seal itself may be forged. was there.

The present invention has been made in view of the above problems, and an object of the present invention is to prevent a waveguide hologram type anti-counterfeiting in which the confidentiality of the information recorded on the waveguide hologram type anti-counterfeiting seal is improved. It is to provide a seal manufacturing system.

[0008]

In order to achieve such an object, the present invention provides a hologram hologram type anti-counterfeiting seal formed by a single mode planar optical waveguide. In the manufacturing system, the original information for preventing forgery is input, and a creation unit that creates recording information for forming a hologram from the original information, and the recording information created by the creating unit are communicated. It is characterized in that it is provided with a receiving means for receiving via a line, and a forming means for forming a hologram on a single mode planar optical waveguide based on the recording information received by the receiving means.

According to a second aspect of the present invention, the hologram according to the first aspect is unevenness formed in the planar optical waveguide, and the creating means two-dimensionally encodes the original information, The recording information is created by obtaining an amplitude distribution and a phase distribution.

According to a third aspect of the present invention, the forming means according to the second aspect exposes the electron beam photosensitive resin with the electron beam modulated by the recorded information,
It is characterized in that a hologram master is produced by developing, and the hologram is transferred from the hologram master to a single-mode planar optical waveguide.

According to a fourth aspect of the present invention, the forming means according to the second aspect forms the hologram by exposing and developing a photosensitive resin with a laser beam modulated by the recording information. Is characterized by.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a view showing the structure of the waveguide hologram type anti-counterfeiting seal according to the first embodiment of the present invention. FIG. 2A is a side view and FIG. 2B is a top view. The waveguide hologram type anti-counterfeiting seal 11 includes a lower clad layer 12, a core layer 13, and an upper clad layer 1.
4 is a single-mode planar optical waveguide composed of an input section 15 and an output section 1 on which a hologram is formed.
6, and the waveguide section 1 connecting the input section 15 and the output section 16
7 and 7. The input section 15 and the output section 16 may be directly coupled without providing the waveguide section 17.

With such a structure, when the input section 15 is irradiated with the external light 21 which is a plane wave, the 4
Due to the 5 ° reflection surface, the guided light beam 22 becomes the waveguide portion 17
Propagate. When the guided light 22 reaches the output section 16 on which the hologram is formed, diffracted light 23 is generated and a hologram image can be formed.

Since the luminous flux of the input unit 15 is several mm, the external light 21 which is a plane wave of a luminous flux larger than the luminous flux of the input unit 15 may be incident. Therefore, the light can be manually focused on the core layer, and the above-described criterion c) can be satisfied. Further, since the diffracted light 23 can be visually recognized, it is not necessary to provide a light receiver such as a CCD.

FIG. 3 is a side view showing a waveguide hologram type anti-counterfeiting seal according to a second embodiment of the present invention. The waveguide hologram type anti-counterfeiting seal 31 does not have a reflecting surface formed at the end of the input section 15, and differs from the first embodiment in that an organic dye fluorescent material is used for the input section 15. For example, Rhodamine 6G, 0.02-0.0
The epoxy-based oligomer containing 02 wt% is irradiated with light through a mask and cured to form the input unit 15. External light 21 having a wavelength of 400 to 550 nm, which is a plane wave, is input to the input unit 15.
When incident on, the guided light 22 having a peak wavelength of 590 to 620 nm is generated. Diffracted light 23 can be obtained by forming a hologram having a width of 0.1 μm and a height of 0.1 μm on the output section 16 by using an electron beam resist or electron beam exposure.

In the waveguide hologram type anti-counterfeiting seal 31 according to the third embodiment, the organic EL is provided in the input section 15.
A light emitter is used. For example, the input unit 15 has a two-layer structure of a diamine layer which is an organic EL light emitting layer and an aluminum quinoline layer. The electrode is a transparent indium tin oxide anode,
The cathode is an alloy of magnesium and silver. The thickness of the diamine layer to be the hole transport layer was 75 nm, and the thickness of the aluminum quinoline layer to be the light emitting layer was 60 nm.

Drive current 100-400 mA, voltage 11-
When a strong electric field of 15 V is applied to the organic EL light emitting layer of the input section 15, guided light 22 having a peak wavelength of 450 to 620 nm is generated. Diffracted light 23 can be obtained by forming a hologram having a width of 0.1 μm and a height of 0.1 μm on the output section 16 by using an electron beam resist or electron beam exposure.

FIG. 4 is a view showing a method of attaching a waveguide hologram type anti-counterfeiting seal to an object according to an embodiment of the present invention. Waveguide hologram type anti-counterfeiting seal 3
1 shows a state in which the transparent cover seal 42 is attached to the object 41 which is the target of forgery prevention. Object 4
Specifically, 1 is a passport paper, various licenses, various membership cards, and the like.

Waveguide hologram type anti-counterfeiting seal 31
Is a waveguide hologram type anti-counterfeiting seal 1 shown in FIG.
It may be 1. Further, although the waveguide hologram type anti-counterfeiting seal 31 has one core layer 13, it may have a plurality of core layers as in the hologram information recording medium shown in FIG.

The adhesive strength of the adhesive portion 51 between the object 41 and the transparent cover seal 42 is Asb, and the adhesive strength of the adhesive portion 52 between the object 41 and the lower clad layer 12 of the waveguide hologram type anti-counterfeiting seal 31 is Awb. The adhesive strength of the adhesive portion 53 between the transparent cover seal 42 and the upper cladding layer 14 of the waveguide hologram type anti-counterfeiting seal 31 is represented by Asw. Lower clad layer 12, core layer 13, and core layer 13
Assuming that the adhesive strength of the adhesive portion between the upper clad layer 14 and the upper clad layer 14 is Acc, Asb >> Acc Awb >> Acc Asw >> Acc.

According to this embodiment, the transparent cover seal 4
When No. 2 is peeled off, the bonded portions between the lower clad layer 12 and the core layer 13 and between the core layer 13 and the upper clad layer 14 are always peeled off because of the above-described adhesive strength. Therefore, once peeled off, the waveguide hologram type forgery prevention seal 31
Since it cannot be used again as, the above-mentioned criterion d) can be satisfied.

Further, in the case of the waveguide hologram type anti-counterfeiting seal having a plurality of core layers, the information recorded in each core layer is changed according to the degree of importance, so that the above-mentioned criterion e) is satisfied. You can

FIG. 5 is a block diagram showing an apparatus for manufacturing a waveguide hologram type anti-counterfeiting seal according to the first embodiment of the present invention. The customer's computer 101 and the computer 102 of the manufacturer of the waveguide hologram type anti-counterfeiting seal are connected by a communication line. The customer's computer 101 creates recording information by performing encoding processing based on numerical calculation on the original information created by the customer to prevent forgery in order to form a hologram.

The computer 102 is the computer 10.
When the recording information to be recorded on the waveguide hologram type forgery prevention seal is received from 1, the information is transferred to the electron beam exposure apparatus 103. Therefore, the computer 102 of the manufacturing company
In, you cannot see the original information directly. In addition, as a method of creating the record information, for example, Japanese Patent Laid-Open No.
It is also possible to apply the hologram memory data creation device described in Japanese Patent Publication No. 00-321964.

The electron beam exposure device 103 irradiates the electron beam photosensitive resin with the electron beam modulated by the recorded information to expose the electron beam photosensitive resin, and performs a known development process to form a hologram master. By pressing the hologram master onto the plastic substrate with the stamper 104,
A waveguide hologram type anti-counterfeiting seal with a hologram transferred is created. According to this method, the stamper
The waveguide hologram type anti-counterfeiting seal in which the same information is written can be mass-produced. That is, it is possible to mass-produce a small variety of products.

FIG. 6 is a block diagram showing an apparatus for manufacturing a waveguide hologram type anti-counterfeiting seal according to a second embodiment of the present invention. In the second embodiment, the manufacturer of the waveguide hologram type anti-counterfeiting seal uses the UV laser device 10
5 is used to make a waveguide hologram type anti-counterfeiting seal. The UV laser device 105 irradiates the photosensitive resin with a laser beam modulated by the recorded information to expose it to light, and performs a known development process to form a hologram. According to this method, it is possible to produce a waveguide hologram type anti-counterfeiting seal in which different information is written for each article, and it is possible to produce a large variety of products in small quantities.

As an alternative method to the numerical calculation in the computer 101, for example, Japanese Unexamined Patent Publication No. 2001-838.
The method for manufacturing the hologram information recording medium described in Japanese Patent No. 65 may be applied.

[0029]

As described above, according to the present invention,
Since the recorded information for forming the hologram is received through the communication line and the waveguide hologram type anti-counterfeiting seal is manufactured, the confidentiality of the information recorded on the waveguide hologram type anti-counterfeiting seal is improved. Is possible.

[Brief description of drawings]

FIG. 1 is a diagram showing a structure of a conventional hologram information recording medium.

FIG. 2 is a diagram showing a structure of a waveguide hologram type forgery prevention seal according to the first embodiment of the present invention.

FIG. 3 is a side view showing a waveguide hologram type forgery prevention seal according to a second embodiment of the present invention.

FIG. 4 is a view showing a method of attaching a waveguide hologram type anti-counterfeiting seal to an object according to an embodiment of the present invention.

FIG. 5 is a block diagram showing a manufacturing apparatus of the waveguide hologram type forgery prevention seal according to the first embodiment of the present invention.

FIG. 6 is a block diagram showing an apparatus for manufacturing a waveguide hologram type anti-counterfeiting seal according to a second embodiment of the present invention.

[Explanation of symbols]

11,31 Waveguide hologram type anti-counterfeiting seal 12 Lower clad layer 13 core layer 14 Upper clad layer 15 Input section 16 Output section 17 Waveguide section 21 External light 22 Guided light 23 Diffracted light 41 objects 42 transparent cover seal 51,52,53 Adhesive part 101,102 computer 103 electron beam exposure apparatus 104 Stamper 105 UV laser device

Continued front page    (72) Inventor Saburo Imamura             2-1-1, Nishishinjuku, Shinjuku-ku, Tokyo             Nutty Advance Technology Co., Ltd.             Inside the company (72) Inventor Masahiro Sawada             2-1-1, Nishishinjuku, Shinjuku-ku, Tokyo             Nutty Advance Technology Co., Ltd.             Inside the company (72) Inventor Makoto Hikita             2-1-1, Nishishinjuku, Shinjuku-ku, Tokyo             Nutty Advance Technology Co., Ltd.             Inside the company (72) Inventor Atsushi Yamauchi             2-1-1, Nishishinjuku, Shinjuku-ku, Tokyo             Nutty Advance Technology Co., Ltd.             Inside the company (72) Inventor Takashi Kurihara             2-3-1, Otemachi, Chiyoda-ku, Tokyo             Inside Telegraph and Telephone Corporation (72) Inventor Yoshiyuki Imai             2-3-1, Otemachi, Chiyoda-ku, Tokyo             Inside Telegraph and Telephone Corporation (72) Inventor Iku Takeshi             2-3-1, Otemachi, Chiyoda-ku, Tokyo             Inside Telegraph and Telephone Corporation F-term (reference) 2C005 HA01 HB01 HB02 HB03 HB10                       HB20 JA18 JB08 KA06 KA37                       KA70                 2K008 AA13 DD03 EE04 FF11 GG05

Claims (4)

[Claims] 1. A manufacturing system of a waveguide hologram type anti-counterfeiting seal formed by a single mode flat optical waveguide, for inputting original information for anti-counterfeiting and forming a hologram from the original information. And a receiving means for receiving the record information created by the creating means through a communication line, and a single mode plane based on the record information received by the receiving means. A method for manufacturing a waveguide hologram type anti-counterfeiting seal, comprising: a forming means for forming a hologram on a mold optical waveguide. 2. The hologram is an unevenness formed in the planar optical waveguide, and the creating means two-dimensionally encodes the original information to obtain an amplitude distribution and a phase distribution,
The manufacturing system of a waveguide hologram type anti-counterfeiting seal according to claim 1, wherein the recorded information is created. 3. The hologram master is produced by exposing the electron beam photosensitive resin with an electron beam modulated by the recorded information and developing the hologram master, and the single-mode planar optical waveguide is formed from the hologram master. The waveguide hologram type anti-counterfeiting seal manufacturing system according to claim 2, wherein the hologram is formed by transferring the hologram. 4. The forming means exposes a photosensitive resin with a laser beam modulated by the recording information,
The waveguide hologram type anti-counterfeiting seal manufacturing system according to claim 2, wherein the hologram is formed by developing.