JP4989651B2 - 秘密情報用記憶媒体 - Google Patents
秘密情報用記憶媒体 Download PDFInfo
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- JP4989651B2 JP4989651B2 JP2008529499A JP2008529499A JP4989651B2 JP 4989651 B2 JP4989651 B2 JP 4989651B2 JP 2008529499 A JP2008529499 A JP 2008529499A JP 2008529499 A JP2008529499 A JP 2008529499A JP 4989651 B2 JP4989651 B2 JP 4989651B2
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Images
Classifications
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- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/0005—Adaptation of holography to specific applications
- G03H1/0011—Adaptation of holography to specific applications for security or authentication
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- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
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- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/0005—Adaptation of holography to specific applications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/16—Processes or apparatus for producing holograms using Fourier transform
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/0005—Adaptation of holography to specific applications
- G03H1/0011—Adaptation of holography to specific applications for security or authentication
- G03H2001/0016—Covert holograms or holobjects requiring additional knowledge to be perceived, e.g. holobject reconstructed only under IR illumination
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- G—PHYSICS
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- G03H1/0011—Adaptation of holography to specific applications for security or authentication
- G03H2001/0016—Covert holograms or holobjects requiring additional knowledge to be perceived, e.g. holobject reconstructed only under IR illumination
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- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
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Landscapes
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Credit Cards Or The Like (AREA)
- Holo Graphy (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Optical Recording Or Reproduction (AREA)
Description
記憶媒体は、場合により、アナログ暗号化により、好ましくないアクセスから保護することができる。
EP0622789B1 (3-5頁)、DE4434966 A1 (2-5頁)、DE19631864 A1 (2-16頁)、DE19620588 A1 (3-4頁)、DE19720288 A1 (2-8頁)、DE4208328 A1 (3頁3-4行、9-11行、34-40行、56-60行)、DE10027153 A1 (2-8頁61行)、DE10027152 A1 (2-8頁)、WO 196038410 A1、US5496670 (1欄42-67行、6欄22行〜12欄20行)、US5543267 (2欄48行〜5欄3行)、EP0622789 B1 (3頁17行〜5頁31行)、WO9202930 A1 (6頁26-35行、7頁25行〜14頁20行)、WO1992002930 A1。
上記ポリマーB1(15.0g)を、70℃でシクロペンタノン(100ml)に溶解した。溶液を室温まで冷却し、0.45μmのテフロンフィルタで、次いで0.2μmのテフロンフィルタで濾過した。溶液は室温で安定であり、ポリマーB1を種々の表面、例えば、ポリマー表面及び金属蒸着ポリマー表面に適用するのに使用した。
3.1 ガラス基材の被覆
厚さ1mmのガラス基材の被覆を、スピンコーティングにより行った。Karl Susss CT 60スピンコータを使用した。正方形ガラス基材(26×26mm2)を装置の回転プラットホームに固定し、実施例2の溶液で覆い、所定時間、回転させた。装置の回転プログラム(回転の加速度、速度及び時間)に依存して、厚さ0.2〜2.0μmの、透明かつ無定形の光学品質被膜が得られた。塗布されたガラス基材を、真空キャビネットに室温で24時間保存して、被膜から残留溶媒を除去した。
手動ドクターブレードを用いて、実施例2の溶液を、厚さ5μmのPETフィルム(Dupont製 MelinexTM)に塗布した。
実施例2のポリマー溶液に使用した溶媒(シクロペンタノン)はポリカーボネートを攻撃するので、ポリカーボネートフィルム(PCフィルム、例えばBayer Material Science製 MakrofolTM)に直接塗布することはできない。
4.1 PCフィルム及びPETフィルムの金属蒸着
PCフィルム(Bayer製 MakrofolTM)及び異なる厚さを有するPETフィルム(Dupont製 MelinexTM、Dupont製 MylarTM、東レ製 LumirrorTM)を被覆した。反射層として銀を使用し、マグネトロンスパッタリングにより適用した。被覆中のアルゴン圧は5×10−3mbarであった。スパッタリングは、1.3W/cm2の出力密度で行った。層厚は、機械式表面形状測定装置(Tencor製 Alpha-step 500)を用いて測定した。厚さは、100〜400nmの間に設定した。
実施例1のフォトアドレス可能なポリマーを、実施例3.1と同様にしてスピンコーティングにより、又は実施例3.2と同様にしてドクターブレードにより、実施例2の溶液から、実施例4.1の金属蒸着PETフィルムの1つに直接塗布した。スピンコーティングにより、装置の回転プログラム(回転の加速度、速度及び時間)に依存して、0.2〜2.0μmの厚さを有する、透明かつ無定形の光学品質塗膜が得られた。
フォトアドレス可能なポリマーにより被覆された実施例4に従ったプラスチックフィルムを、PAP側に被覆し、場合により更にプラスチックフィルム側に被覆し、又はフィルムで覆った。これらの被覆/フィルムは、機械的負荷容量を改善し、情報層を機械的影響又は他の影響(熱、光、湿気)から保護する。層は、コーティング、ラッカー塗布又は積層により適用することができる。
外側保護層として、シリカ被膜を適用した。実施例4.2のフィルムのPAP層上に、約200nmの粒径を有するSiO2粒子を、電子線蒸発器により、透明保護層として堆積させた。電子線の出力は1.5kWであり、方法は、5×10−7mbarの高真空で実施した。
実施例5.1のシリカ被覆に、更に紫外線硬化性ラッカーを適用した。ラッカー層は、実施例4.2と同様のスピンコーティングにより、DVD接着剤(DIC Europe GmbH製性 DAICURE CLEAR SD-645)の形で適用し、紫外線照射(90ワット、312nm)により硬化した。スピンコータの回転プログラム(回転の加速度、速度及び時間)を適切に調節することにより、厚さ50ミクロンの、透明かつ無定形の光学品質被膜が得られた。被膜は、スピンコーティングの回転プログラムに依存して、1〜100μmの厚さに調節することができた。
実施例4.2に従って製造したフィルム層に、構造化した又は滑らかなポリカーボネートフィルムを、水圧ホットプレス(Buerkle type LA 62)により、積層した。PAP層がポリカーボネートフィルムにより被覆された。積層は、2つの研磨ステンレス鋼プレート(反射シート金属)及び均圧化層(プレスクッション)の間で行った。積層パラメータ(温度、時間、圧力)は、PAP被覆が視認できる損傷を受けないように調節した。
実施例4.2、5.1、5.2及び5.3に記載した層構造を、更なる支持体に適用した。層構造を、接着結合によりPVCフィルムに適用した。機械的負荷に耐えられるデータ媒体が得られた。
幅3mmの正方形突起(間隔2mm、高さ0.5mm)を有するカードの製造を、Formpool社に委託した(図10参照)。カードの厚さは、全体で1mmであった。カードは、高速プロトタイプ法(真空注型)により、ポリウレタンから製造した。カードに、実施例4と同様にして銀層及びフォトアドレス可能なポリマーを供給し、実施例5と同様にして保護層を供給し、実施例7と同様にしてホログラムを書き込んだ。ホログラムは、突起部(凸部)に配置した。
厚さ750μmのポリカーボネートフィルム(MakrolonTM DE 1-1)を記憶カードとして使用し、実施例4.1、4.2及び5.1と同様にして、下記の層を供給した:厚さ1μmのParylene層、厚さ0.1μmの銀層、厚さ1.6μmのフォトアドレス可能なポリマーの層、及び厚さ0.15μmのSiO2層(記載の順序で)。
局所複屈折を、光の照射により記憶カードに導入した。そのために使用した装置は、例えば、R. Hagen, T. Bieringer; Photoaddressable Polymers for Optical Data Storage; Advanced Materials; WILEY-VCH Verlag GmbH (2001); No. 13/23; 1807頁; Fig. 2 に記載されている。
露光は、WO 99/57719 A1(10頁1行〜14頁16行)に記載された装置を用いて、Optilink Kft.により実施された。
使用した書き込みレーザは、532nmの波長を有する周波数2倍Nd:YAGレーザであった。
ホログラムは、眼には見えず、データは2ヶ月後でさえ読み出すことができた(書き込まれた複屈折は、時間の経過に対して安定である)。
2 レーザ光源
3 ビームガイド
4 鏡
5 データマスク
5’再構成されたデータマスク
6 情報光
6’再構成された情報光
7 参照光
8 検出器(カメラ)
9 キー
10 保護層
11 反射層
12 基材
Claims (3)
- フォトアドレス可能なポリマーの少なくとも1層を含み、少なくとも1つの偏光ホログラムの形式のデータが、照射により、該層に組み込まれており、偏光ホログラムはヒトの眼には不可視であるデータ記憶用光記憶媒体であって、プラスチックカードの形状であり、折り曲げた場合に、カード本体全体を折り曲げた時より小さい曲率を有する1つまたはそれ以上のホログラムを供給されたカードの部分を生じる構造がプラスチックカードに導入されていることを特徴とする、光記憶媒体。
- ホログラムの光学的検出を促進する更なる機能が、不可視ホログラフィック構造に組み込まれていることを特徴とする、請求項1に記載の光記憶媒体。
- 照射により請求項1または2に記載の記憶媒体にホログラムを組み込む方法であって、書き込み光のエネルギー投入量が、2つの限界、すなわち、フォトアドレス可能なポリマーの層に可視表面構造を生じる高い限界を超えるエネルギー投入量と、時間の関数として安定でない複屈折構造を生じる低い限界より小さいエネルギー投入量との間にある、方法。
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DE102006062457A1 (de) * | 2006-12-28 | 2008-07-03 | Bayer Innovation Gmbh | Optische Speichermedien und Verfahren zu deren Herstellung |
JP5158598B2 (ja) * | 2008-08-04 | 2013-03-06 | 独立行政法人 国立印刷局 | 情報担持片、機械読取方法及び復号方法並びに記録媒体 |
US8728685B2 (en) * | 2009-06-25 | 2014-05-20 | Sabic Innovative Plastics Ip B.V. | Method of making holographic storage medium |
DE102009043317A1 (de) * | 2009-09-28 | 2011-03-31 | Eos Gmbh Electro Optical Systems | Verfahren und Vorrichtung zum generativen Herstellen eines dreidimensionalen Objekts mit dreidimensional kodiertem Zeichen |
GEP20125395B (en) | 2009-12-16 | 2012-02-10 | Method of code recording for protection of product against falsification and device for its identification | |
US20110262844A1 (en) * | 2010-04-21 | 2011-10-27 | Beam Engineering For Advanced Measurement Co. | Fabrication of high efficiency, high quality, large area diffractive waveplates and arrays |
US8703363B2 (en) * | 2011-02-16 | 2014-04-22 | Sabic Innovative Plastic Ip B.V. | Reflection hologram storage method |
DE102011007571A1 (de) * | 2011-04-18 | 2012-10-18 | Siemens Aktiengesellschaft | Tamperschutzvorrichtung zum Tamperschutz eines Feldgeräts |
US9195215B2 (en) * | 2011-11-29 | 2015-11-24 | Bayer Intellectual Property Gmbh | Holographic medium having a protective layer |
JP5970912B2 (ja) * | 2012-03-29 | 2016-08-17 | 大日本印刷株式会社 | 生体分子印刷物の製造方法 |
US9779227B1 (en) * | 2014-10-24 | 2017-10-03 | Amazon Technologies, Inc. | Security system using keys encoded in holograms |
JP2016052799A (ja) * | 2016-01-21 | 2016-04-14 | 大日本印刷株式会社 | 生体分子印刷物、及びその製造方法 |
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US3894756A (en) * | 1971-10-18 | 1975-07-15 | Optronics Int | Identification card having a reference beam coded hologram |
US4360728A (en) * | 1981-02-27 | 1982-11-23 | Drexler Technology Corporation | Banking card for automatic teller machines and the like |
US5173381A (en) * | 1991-08-05 | 1992-12-22 | Queen's University | Azo polymers for reversible optical storage |
DE4208328C2 (de) * | 1992-03-16 | 2002-11-14 | Bayer Ag | Verfahren und Vorrichtung zur löschbaren Speicherung von Information |
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US5496670A (en) * | 1993-08-30 | 1996-03-05 | Riso National Laboratory | Optical storage medium |
US5700550A (en) * | 1993-12-27 | 1997-12-23 | Toppan Printing Co., Ltd. | Transparent hologram seal |
US6124970A (en) * | 1997-10-20 | 2000-09-26 | Latents Image Technology Ltd. | Polymer materials with latent images visible in polarized light and methods for their production |
US6153272A (en) * | 1998-05-18 | 2000-11-28 | University Of Massachusetts Lowell | Liquid crystal alignment by covalently bound anisotropes |
DE10027153A1 (de) * | 2000-05-31 | 2001-12-06 | Bayer Ag | Blockcopolymere zur optischen Datenspeicherung |
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US7063924B2 (en) * | 2002-12-20 | 2006-06-20 | Eastman Kodak Company | Security device with patterned metallic reflection |
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US20050248817A1 (en) * | 2004-05-07 | 2005-11-10 | Inphase Technologies, Inc. | Covert hologram design, fabrication and optical reconstruction for security applications |
US20060196948A1 (en) * | 2005-03-04 | 2006-09-07 | Weber Michael F | Light transmissive cards with suppression of UV-induced fluorescence |
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