WO2005040871A1 - 識別媒体、識別媒体の識別方法、識別対象物品および識別装置 - Google Patents
識別媒体、識別媒体の識別方法、識別対象物品および識別装置 Download PDFInfo
- Publication number
- WO2005040871A1 WO2005040871A1 PCT/JP2004/015898 JP2004015898W WO2005040871A1 WO 2005040871 A1 WO2005040871 A1 WO 2005040871A1 JP 2004015898 W JP2004015898 W JP 2004015898W WO 2005040871 A1 WO2005040871 A1 WO 2005040871A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- liquid crystal
- identification medium
- circularly polarized
- cholesteric liquid
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/364—Liquid crystals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
- B42D25/391—Special inks absorbing or reflecting polarised light
-
- B42D2033/26—
Definitions
- blue clockwise circularly polarized light from the cholesteric liquid crystal layer 501 and blue counterclockwise circularly polarized light and linearly polarized light from the multilayer thin film 502 are simultaneously observed. Therefore, the blue reflected light is more emphasized and observed than when the cholesteric liquid crystal layer is used alone. Also, when the reflected light from the multilayer structure 503 is observed through a filter that transmits only clockwise circularly polarized light, the filter blocks blue counterclockwise circularly polarized light and linearly polarized light from the multilayer thin film 502, The observed reflected light is weaker than when no filter is used.
- the optical properties of the cholesteric liquid crystal layer and the optical properties of a multilayer thin film in which light-transmitting thin films having different refractive indices are stacked in multiple layers are simply added together.
- they can provide significantly unique optical properties that are not expected. That is, when the identification medium of the present invention is irradiated with natural light, reflection light containing both clockwise and counterclockwise circularly polarized light is obtained.
- a cholesteric liquid crystal layer selectively reflects circularly polarized light in a certain rotation direction, but a multilayer thin film does not have the property of selectively reflecting circularly polarized light in the opposite direction.
- clockwise and counterclockwise circularly polarized light and linearly polarized light are reflected from the identification medium.
- the discrimination medium of the present invention is provided with discrimination by utilizing a phenomenon in which optical phenomena such as left and right circularly polarized light components, colors, patterns, and color shifts appear intricately intertwined! Therefore, there is an advantage that counterfeiting using copying by taking in an image is impossible in principle. Furthermore, since it is excellent in color, a product excellent in design can be obtained. this thing Is useful when products whose design is important are to be identified. Brief Description of Drawings
- an ultraviolet curing resin is applied to the surface of the multilayer thin film 103 to form a layer before the adhesive layer or the adhesive layer 104 is cured, and the cholesteric liquid crystal layer 106 is bonded thereon. Then, the adhesive layer or the adhesive layer 104 is cured by irradiating ultraviolet rays, and the multilayer thin film 103 and the cholesteric liquid crystal layer 106 are adhered and integrated by the adhesive layer or the adhesive layer 104. Thus, the identification medium 100 is obtained.
- the discrimination medium 100 is irradiated with left-handed circularly polarized light using an optical filter that selectively transmits left-handed circularly polarized light
- the reflected light is only the multilayer thin film 103.
- the difference in optical characteristics can be reduced. Can be recognized.
- the article 802 is placed on the pedestal 801 and the position is adjusted so that the identification medium 803 is irradiated with a light beam. Then, the white lamp 804 is turned on, and the identification medium 803 is irradiated with white light.
- the photodetector 806 detects only the red reflected light from the cholesteric liquid crystal layer 106.
- the blue light is detected in the photodetector 806.
- the optical filter 805 blocks the clockwise circularly polarized light component included in the light incident on the identification medium 803, so that the reflected light from the cholesteric liquid crystal layer 106 is not detected.
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
- Credit Cards Or The Like (AREA)
- Optical Filters (AREA)
- Holo Graphy (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04793010A EP1684098B1 (en) | 2003-10-28 | 2004-10-27 | Discriminating medium, method of discriminating the medium and article to be discriminated |
DE602004027407T DE602004027407D1 (de) | 2003-10-28 | 2004-10-27 | Unterscheidungsmedium, unterscheidungsverfahren und ein zu unterscheidender artikel |
CN2004800320150A CN1875299B (zh) | 2003-10-28 | 2004-10-27 | 识别媒体、识别媒体的识别方法、识别对象物品以及识别装置 |
US10/576,965 US7943392B2 (en) | 2003-10-28 | 2004-10-27 | Discrimination medium, discrimination method, article to be discriminated, and discrimination apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-368035 | 2003-10-28 | ||
JP2003368035A JP4257903B2 (ja) | 2003-10-28 | 2003-10-28 | 識別媒体、識別媒体の識別方法、識別対象物品および識別装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005040871A1 true WO2005040871A1 (ja) | 2005-05-06 |
Family
ID=34510326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/015898 WO2005040871A1 (ja) | 2003-10-28 | 2004-10-27 | 識別媒体、識別媒体の識別方法、識別対象物品および識別装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7943392B2 (ja) |
EP (1) | EP1684098B1 (ja) |
JP (1) | JP4257903B2 (ja) |
CN (1) | CN1875299B (ja) |
DE (1) | DE602004027407D1 (ja) |
WO (1) | WO2005040871A1 (ja) |
Cited By (3)
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US7879415B2 (en) * | 2004-10-01 | 2011-02-01 | Nhk Spring Co., Ltd. | Discrimination medium and discrimination method therefor |
US8158239B2 (en) * | 2005-12-28 | 2012-04-17 | Nhk Spring Co., Ltd. | Identification medium |
US8279394B2 (en) | 2006-04-03 | 2012-10-02 | Nhk Spring Co., Ltd. | Discrimination medium comprising a liquid crystal layer acting as a half-wave plate wherein a gradation of gradual or continuous color changes are displayed according to an area |
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US20210198576A1 (en) * | 2018-05-31 | 2021-07-01 | Zeon Corporation | Identification medium, and method for determining authenticity of identification medium |
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JPH04144796A (ja) | 1989-12-22 | 1992-05-19 | Gao Ges Autom Org Mbh | セキュリティ素子を有するデータ担体 |
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JP2002071953A (ja) * | 2000-09-05 | 2002-03-12 | Dainippon Printing Co Ltd | 真偽判定体並びにその作製方法及び使用方法 |
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AU584035B2 (en) * | 1985-03-01 | 1989-05-11 | Kenneth John Hayden | Holographic security devices and systems |
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GB0201767D0 (en) | 2002-01-25 | 2002-03-13 | Rue De Int Ltd | Improvements in methods of manufacturing substrates |
JP2003231380A (ja) * | 2002-02-12 | 2003-08-19 | Nhk Spring Co Ltd | 対象物の識別媒体及び識別方法 |
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JP4565541B2 (ja) * | 2003-10-31 | 2010-10-20 | 日本発條株式会社 | 識別媒体および識別対象物品 |
-
2003
- 2003-10-28 JP JP2003368035A patent/JP4257903B2/ja not_active Expired - Lifetime
-
2004
- 2004-10-27 DE DE602004027407T patent/DE602004027407D1/de active Active
- 2004-10-27 CN CN2004800320150A patent/CN1875299B/zh not_active Expired - Fee Related
- 2004-10-27 US US10/576,965 patent/US7943392B2/en not_active Expired - Fee Related
- 2004-10-27 WO PCT/JP2004/015898 patent/WO2005040871A1/ja active Application Filing
- 2004-10-27 EP EP04793010A patent/EP1684098B1/en not_active Not-in-force
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH04144796A (ja) | 1989-12-22 | 1992-05-19 | Gao Ges Autom Org Mbh | セキュリティ素子を有するデータ担体 |
WO2000013065A1 (en) * | 1998-08-27 | 2000-03-09 | Nippon Mitsubishi Oil Corporation | Genuineness detecting system and method for using genuineness detecting film |
EP1028359A1 (en) | 1998-08-27 | 2000-08-16 | Nippon Mitsubishi Oil Corporation | Genuineness detecting system and method for using genuineness detecting film |
JP2000255200A (ja) * | 1999-03-05 | 2000-09-19 | Dainippon Printing Co Ltd | 偽造防止体及び偽造判別方法 |
JP2002071953A (ja) * | 2000-09-05 | 2002-03-12 | Dainippon Printing Co Ltd | 真偽判定体並びにその作製方法及び使用方法 |
Non-Patent Citations (1)
Title |
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See also references of EP1684098A4 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7879415B2 (en) * | 2004-10-01 | 2011-02-01 | Nhk Spring Co., Ltd. | Discrimination medium and discrimination method therefor |
US8158239B2 (en) * | 2005-12-28 | 2012-04-17 | Nhk Spring Co., Ltd. | Identification medium |
US8279394B2 (en) | 2006-04-03 | 2012-10-02 | Nhk Spring Co., Ltd. | Discrimination medium comprising a liquid crystal layer acting as a half-wave plate wherein a gradation of gradual or continuous color changes are displayed according to an area |
Also Published As
Publication number | Publication date |
---|---|
CN1875299A (zh) | 2006-12-06 |
JP4257903B2 (ja) | 2009-04-30 |
EP1684098A4 (en) | 2008-09-10 |
EP1684098A1 (en) | 2006-07-26 |
JP2005134490A (ja) | 2005-05-26 |
US7943392B2 (en) | 2011-05-17 |
US20070037290A1 (en) | 2007-02-15 |
DE602004027407D1 (de) | 2010-07-08 |
CN1875299B (zh) | 2010-10-27 |
EP1684098B1 (en) | 2010-05-26 |
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