JPH06255292A - Information recording medium - Google Patents
Information recording mediumInfo
- Publication number
- JPH06255292A JPH06255292A JP5046645A JP4664593A JPH06255292A JP H06255292 A JPH06255292 A JP H06255292A JP 5046645 A JP5046645 A JP 5046645A JP 4664593 A JP4664593 A JP 4664593A JP H06255292 A JPH06255292 A JP H06255292A
- Authority
- JP
- Japan
- Prior art keywords
- diffraction grating
- light
- infrared
- recording medium
- information recording
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000126 substance Substances 0.000 claims abstract description 10
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 9
- 229910019142 PO4 Inorganic materials 0.000 claims description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 8
- 239000010452 phosphate Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 19
- 239000000463 material Substances 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 5
- 230000001771 impaired effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 29
- 238000000034 method Methods 0.000 description 10
- 238000007639 printing Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000002585 base Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000002178 crystalline material Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 150000004696 coordination complex Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 229920003225 polyurethane elastomer Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 241001428397 Taito Species 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007754 air knife coating Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 238000007611 bar coating method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007756 gravure coating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 125000001434 methanylylidene group Chemical group [H]C#[*] 0.000 description 1
- LKKPNUDVOYAOBB-UHFFFAOYSA-N naphthalocyanine Chemical compound N1C(N=C2C3=CC4=CC=CC=C4C=C3C(N=C3C4=CC5=CC=CC=C5C=C4C(=N4)N3)=N2)=C(C=C2C(C=CC=C2)=C2)C2=C1N=C1C2=CC3=CC=CC=C3C=C2C4=N1 LKKPNUDVOYAOBB-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- WVIICGIFSIBFOG-UHFFFAOYSA-N pyrylium Chemical compound C1=CC=[O+]C=C1 WVIICGIFSIBFOG-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Credit Cards Or The Like (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は回折格子パターン部を有
し、光学的機械読み取りを目的とする情報記録媒体に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium having a diffraction grating pattern portion and intended for optical mechanical reading.
【０００２】[0002]
【従来の技術】基材表面に複数の回折格子からなる回折
格子パターン部を有し、光学的機械読み取りを行なう情
報記録媒体が提案されている（例えば特開平３−２１１
０９６号公報参照）。この情報記録媒体は、個々の回折
格子の空間周波数を変化させるか、または、回折格子の
方向を変化させるか、または、その両方を組み合わせた
形で固定情報を記録したものであり、その情報の再生は
回折格子パターン部に所定の角度からレーザ光を入射さ
せ、レーザ光がどこに回折するかを検知することにより
なされるものである。2. Description of the Related Art An information recording medium having a diffraction grating pattern portion composed of a plurality of diffraction gratings on the surface of a substrate and performing optical mechanical reading has been proposed (for example, JP-A-3-211).
096 publication). This information recording medium is one in which fixed information is recorded by changing the spatial frequency of each diffraction grating, changing the direction of the diffraction grating, or a combination of both. Reproduction is performed by making laser light incident on the diffraction grating pattern portion at a predetermined angle and detecting where the laser light is diffracted.
【０００３】この技術は回折格子パターン部の複製（偽
造）が困難で、機械で情報の再生が可能となることか
ら、クレジットカードの分野で行なわれていたカード基
材に貼着された絵や文字が形成されたホログラムの目視
による真偽判定に代わる新規な真偽判定として、実用に
供せられようとしている。In this technique, it is difficult to copy (counterfeit) the diffraction grating pattern portion, and the information can be reproduced by a machine. It is about to be put to practical use as a new authenticity determination that replaces the visual authenticity determination of a hologram on which characters are formed.
【０００４】尚、上記回折格子パターン部を有する情報
記録媒体の製造は、回折格子の凹凸形状を記録してある
金型を、プラスチックフィルムもしくは剥離可能なエン
ボス層を形成したプラスチックフィルムに加圧密着し、
その凸凹模様を複製したエンボス層の凸凹面上に金属蒸
着等により反射層を成膜後、熱可塑性樹脂等からなる接
着層を形成した転写シールもしくは転写箔を作成し、エ
ンボス層以下をカード基材に貼着することによりなされ
る。Incidentally, in the manufacture of the information recording medium having the above-mentioned diffraction grating pattern portion, a metal mold in which the concave and convex shape of the diffraction grating is recorded is pressed and adhered to a plastic film or a plastic film having a peelable embossed layer formed thereon. Then
After forming a reflection layer by metal deposition on the uneven surface of the embossed layer that duplicates the uneven pattern, create a transfer seal or transfer foil with an adhesive layer made of thermoplastic resin etc. It is made by sticking to the material.
【０００５】[0005]
【発明が解決しようとする課題】このような情報の読み
とりは、情報記録媒体の情報パターン部とレーザ光を相
対移動することにより行なわれる。しかし、レーザ光が
情報パターン部の回折格子上を移動、情報を読み取る際
は、正常な回折光を検知することができるが、回折格子
以外に照射した場合、基材に印刷された絵柄により反射
光が生じ、それを誤って回折光と検知して、誤った情報
を再生してしまうことがあった。Such information reading is performed by moving the information pattern portion of the information recording medium and the laser beam relatively. However, when the laser light moves on the diffraction grating of the information pattern part and reads information, normal diffraction light can be detected, but when irradiated to other than the diffraction grating, it is reflected by the pattern printed on the base material. In some cases, light is generated, which is mistakenly detected as diffracted light to reproduce incorrect information.
【０００６】上記のような欠点を防ぐため、予め基材表
面を黒色のインキで被覆し、その上に絵柄を印刷した
後、回折格子パターン形成部を設ける等の措置が考えら
れる。しかし、上記のような措置を施した場合、黒地に
絵柄を印刷するため、カラーマッチングが困難となり、
デザインが規制されてしまう。In order to prevent the above-mentioned drawbacks, it is conceivable to coat the surface of the base material with black ink in advance, print a pattern on it, and then provide a diffraction grating pattern forming portion. However, when the above measures are taken, the pattern is printed on a black background, which makes color matching difficult,
The design is regulated.
【０００７】本発明は、光学的機械読み取りに使用する
回折格子を有する情報記録媒体において、装飾効果を失
うこと無く正確な情報再生が可能な情報記録媒体を提供
することを目的とする。It is an object of the present invention to provide an information recording medium having a diffraction grating used for optical mechanical reading, which enables accurate information reproduction without losing the decorative effect.
【０００８】[0008]
【課題を解決するための手段】請求項１記載の発明は、
基材上に、実質的に可視光領域に吸収がなく、赤外光を
吸収する赤外線吸収物質を含有する赤外線吸収層と回折
格子パターン部を少なくとも有することを特徴とする情
報記録媒体である。The invention according to claim 1 is
It is an information recording medium characterized in that it has at least an infrared absorbing layer containing an infrared absorbing substance that absorbs infrared light and a diffraction grating pattern portion, which has substantially no absorption in the visible light region, on a base material.
【０００９】請求項２記載の発明は、請求項２記載の発
明を前提とし、上記赤外線吸収物質が五二酸化リンを主
成分とし、Ｆｅ2+及び／又はＣｕ2+を含有するリン酸塩
系白色結晶粉末であることを特徴とする情報記録媒体で
ある。The invention according to claim 2 is based on the invention according to claim 2, wherein the infrared absorbing material is a phosphate-based material containing phosphorus pentoxide as a main component and Fe 2+ and / or Cu 2+. It is an information recording medium characterized by being a white crystal powder.
【００１０】[0010]
【作用】本発明に係わる情報記録媒体によれば、赤外線
吸収層は実質的に可視光領域に吸収がなく、赤外領域の
光を吸収するため、レーザ光が基材に当たっても反射光
が発生することはないので、正確な情報再生を行うこと
ができる。また、赤外線吸収層は白色を呈するので、装
飾効果を損なうこともない。According to the information recording medium of the present invention, since the infrared absorbing layer has substantially no absorption in the visible light region and absorbs light in the infrared region, reflected light is generated even when the laser light hits the substrate. Therefore, accurate information reproduction can be performed. Further, since the infrared absorbing layer has a white color, the decorative effect is not impaired.
【００１１】また、そのような赤外線吸収層に含まれる
赤外線吸収物質としては、白色度の点と赤外線吸収能か
ら、五二酸化リンを主成分とし、Ｆｅ2+及び／又はＣｕ
2+を含有するリン酸塩系白色結晶粉末が最適である。The infrared absorbing substance contained in such an infrared absorbing layer is mainly composed of phosphorus pentoxide , Fe 2+ and / or Cu because of its whiteness and infrared absorbing ability.
Phosphate-based white crystalline powder containing 2+ is most suitable.
【００１２】以下に本発明を図面に基づいて更に具体的
に説明する。The present invention will be described below more specifically with reference to the drawings.
【００１３】尚、以下に記述する光学的機械読み取り方
法は単一の回折格子の一次回折光のみを検知する場合に
ついて述べるが、二次以上の回折光の検知についても同
様である。また、二種類以上の微小なエリアで構成され
る回折格子パターンの読み取り方式や、さらには回折光
を検知する方式についても同様である。The optical mechanical reading method described below describes the case of detecting only the first-order diffracted light of a single diffraction grating, but the same applies to the detection of diffracted light of the second or higher order. The same applies to a method of reading a diffraction grating pattern composed of two or more kinds of minute areas and a method of detecting diffracted light.
【００１４】図１、２は本発明の情報記録媒体の一実施
例の構成を示す断面図である。図１においては、基材１
上には白色の赤外線吸収層２、絵柄印刷層３、回折格子
パターン部４から成る。1 and 2 are sectional views showing the construction of an embodiment of the information recording medium of the present invention. In FIG. 1, the substrate 1
On the upper side, a white infrared absorption layer 2, a pattern printing layer 3, and a diffraction grating pattern portion 4 are formed.
【００１５】基材１としては、紙及びプラスチックカー
ドをはじめ、印刷物と成り得るいかなる物質をも用いる
ことができる。また、図２の様に絵柄印刷層の上に赤外
線吸収層を形成する場合についても同様である。As the substrate 1, any substance that can be a printed matter, such as paper and plastic cards, can be used. The same applies to the case where the infrared absorption layer is formed on the pattern print layer as shown in FIG.
【００１６】赤外線吸収層２とは、実質的に可視光領域
に吸収がなく、赤外光領域に吸収能を有する層である。
なお、本明細書中の実質的に可視光領域に吸収がないと
は、可視光領域（波長３８０ｎｍ〜７００ｎｍ）におい
ての吸収率が２０％以下であることを言う。また、赤外
光領域に吸収があるとは近赤外領域において６０％以上
の吸収率を有することを言う。The infrared absorption layer 2 is a layer which has substantially no absorption in the visible light region and has an absorption ability in the infrared light region.
In addition, in this specification, substantially no absorption in the visible light region means that the absorptance in the visible light region (wavelength 380 nm to 700 nm) is 20% or less. Further, having absorption in the infrared region means having an absorption rate of 60% or more in the near infrared region.
【００１７】上記赤外線吸収層２は、赤外線吸収物質を
インキ化し、バーコート、ブレードコート、エアナイフ
コート、グラビアコート、ロールコート等のソルベント
コート法あるいはスクリーン印刷などの既知の塗布方法
により形成する。The infrared absorbing layer 2 is formed by converting the infrared absorbing substance into an ink and using a known coating method such as a solvent coating method such as bar coating, blade coating, air knife coating, gravure coating or roll coating, or screen printing.
【００１８】赤外線吸収物質を例示すると、五二酸化リ
ンを主成分とし、酸化鉄および／又は酸化銅１．０重量
％以上を含有するリン酸塩系白色結晶材料粉末、五二酸
化リンを主成分とし、Ｆｅ2+及び／又はＣｕ2+を含有す
るガラス系材料、金属錯体型の赤外線吸収剤、シアニン
系、フタロシアニン系、ナフタロシアニン系、アントラ
キノン系、アミニウム系、クロコニックメチン系、アズ
レニオウム系、ピリリウム系等の赤外線吸収染料であ
る。Illustrative of the infrared absorbing substance is phosphorus pentaoxide as a main component, and a phosphate-based white crystalline material powder containing iron oxide and / or copper oxide in an amount of 1.0% by weight or more, and phosphorus pentoxide as a main component. , Glass materials containing Fe 2+ and / or Cu 2+ , metal complex type infrared absorbers, cyanine-based, phthalocyanine-based, naphthalocyanine-based, anthraquinone-based, aminium-based, croconic methine-based, azureniium-based, pyrylium It is an infrared absorbing dye of the system.
【００１９】なお、上記白色結晶材料粉末、ガラス系材
料は、必要に応じ、以下の化合物を含有する。The white crystalline material powder and the glass-based material contain the following compounds, if necessary.
【００２０】 Ａｌ2 Ｏ3 ２. ０〜１０．０重量％ Ｂ2 Ｏ3 １. ０〜３０．０重量％ ＭｇＯ ３. ０〜１０．０重量％ ＺｎＯ ０〜 ３．０重量％ Ｋ2 Ｏ ０〜１５．０重量％ ＢａＯ ０〜１０. ０重量％ ＳｒＯ ０〜１０. ０重量％ Ｎｉ, Ｃｏ, Ｓｅ 微量Al 2 O 3 2.0-10.0 wt% B 2 O 3 1.0-30.0 wt% MgO 3.0-10.0 wt% ZnO 0-3.0 wt% K 2 O 0 to 15.0 wt% BaO 0 to 10.0 wt% SrO 0 to 10.0 wt% Ni, Co, Se Trace amount
【００２１】上記した赤外線吸収物質のうち、白色度の
点からは白色結晶材料粉末、ガラス系材料が好ましく、
赤外線吸収能からは白色結晶材料粉末、金属錯体型の赤
外線吸収剤、赤外線吸収染料が好ましい。Among the above infrared absorbing substances, white crystalline material powder and glass-based material are preferable from the viewpoint of whiteness.
From the viewpoint of infrared absorbing ability, white crystalline material powder, a metal complex type infrared absorbing agent, and an infrared absorbing dye are preferable.
【００２２】これらの顔料、染料をインキ化するために
用いるバインダーとしては、塩酢酸ビニール系樹脂、飽
和ポリエステル、ポリウレタンエラストマー等が用いら
れる。上記バインダーは溶剤を除く赤外線吸収インキ組
成中に２０重量％以上含まれることが好ましい。As the binder used for making these pigments and dyes into ink, vinyl acetate vinyl resin, saturated polyester, polyurethane elastomer and the like are used. The binder is preferably contained in the infrared absorbing ink composition excluding the solvent in an amount of 20% by weight or more.
【００２３】また、上記赤外線吸収層２の上層あるいは
下層に、赤外線を透過する性質を備えたプロセスインキ
を用いて、全面的あるいは部分的に絵柄印刷層３を設け
ても良い。Further, the pattern printing layer 3 may be provided entirely or partially on the infrared absorbing layer 2 using a process ink having a property of transmitting infrared rays.
【００２４】回折格子パターン形成部４は、赤外光を用
い回折光の方向、角度、回折格子パターンを検知され得
るものならばいかなるものでも用いることができる。図
３には、一例として４つの回折格子（４ａ、４ｂ）から
なる回折格子パターン形成部の平面図を示した。The diffraction grating pattern forming section 4 may be of any type as long as it can detect the direction, angle and diffraction grating pattern of the diffracted light using infrared light. FIG. 3 shows, as an example, a plan view of a diffraction grating pattern forming portion including four diffraction gratings (4a, 4b).
【００２５】図４は、回折格子パターン部の情報を光学
的機械読み取りを行う方法の一例を示す。回折格子パタ
ーン部４の真上から照射光８としてレーザー光を照射し
た場合、回折光９は、回折格子の線の方向と垂直方向に
回折して返ってくる。本読み取り方法の場合、回折格子
の回折方向を変化させることで情報を記録してある。実
際の読み取りは、図５に示すようなフォトダイオードを
利用した読み取りセンサー１２を所定の位置に配置し、
Ａ方向とＢ方向の二方向の回折光を検知できるようにな
っており、例えばＡ方向の回折光をセンサー１０で受光
しＢ方向の回折光をセンサー１１で受光することができ
る。読み取りレーザーとしては、例えば波長７８０ｎｍ
半導体レーザーを使用できる。FIG. 4 shows an example of a method for optically and mechanically reading the information of the diffraction grating pattern portion. When a laser beam is irradiated as the irradiation light 8 from directly above the diffraction grating pattern portion 4, the diffracted light 9 is diffracted and returned in the direction perpendicular to the direction of the line of the diffraction grating. In the case of this reading method, information is recorded by changing the diffraction direction of the diffraction grating. For actual reading, a reading sensor 12 using a photodiode as shown in FIG. 5 is arranged at a predetermined position,
The diffracted light in the two directions of the A direction and the B direction can be detected. For example, the sensor 10 can receive the diffracted light in the A direction and the sensor 11 can receive the diffracted light in the B direction. As a reading laser, for example, a wavelength of 780 nm
Semiconductor lasers can be used.
【００２６】回折格子パターン部の形状は、例えば図３
に示すように２ｍｍ×１０ｍｍの長方形を並べたものが
用いられる。また回折格子パターン部を形成する回折格
子としては、例えば、空間波長数が７００線／ｍｍであ
り、回折格子の方向が互いに９０度の角を成すものが用
いられる。The shape of the diffraction grating pattern portion is, for example, as shown in FIG.
2 mm × 10 mm rectangles are arranged as shown in FIG. As the diffraction grating forming the diffraction grating pattern portion, for example, a diffraction grating having a spatial wavelength number of 700 lines / mm and directions of the diffraction grating forming an angle of 90 degrees with each other is used.
【００２７】回折格子パターン部を読み取った場合のア
ナログ出力波形を図６および図７に示した。図６は、本
発明の赤外線吸収層を有する情報記録媒体の波形であ
る。赤外線吸収層が光を吸収し白色基材または印刷イン
キによる反射光の発生を防ぐため、図の様なノイズのな
い出力波形が得られる。一方、図７は、赤外線吸収層を
有していない従来の情報記録媒体での出力波形である。
この場合、白色基材または印刷インキで光が反射（散
乱）するため、回折格子からの回折光（出力）と反射光
を判別することが難しくなる。Analog output waveforms when the diffraction grating pattern portion is read are shown in FIGS. 6 and 7. FIG. 6 is a waveform of the information recording medium having the infrared absorbing layer of the present invention. Since the infrared absorption layer absorbs light and prevents the generation of reflected light by the white base material or printing ink, a noise-free output waveform as shown in the figure is obtained. On the other hand, FIG. 7 shows an output waveform in a conventional information recording medium having no infrared absorption layer.
In this case, since the light is reflected (scattered) by the white base material or the printing ink, it becomes difficult to distinguish the diffracted light (output) from the diffraction grating and the reflected light.
【００２８】[0028]
【００２９】先ず、基材上に回折格子パターン部を形成
するための転写箔を製造する。支持体フィルムとして、
ポリエステルを用いた。次にアクリル系樹脂及びウレタ
ン系樹脂を塗料化し、バーコート法により支持体フィル
ム上に塗布、乾燥して、各々厚さ２μｍの剥離性保護
層、エンボス層を形成後、回折格子の凹凸が形成された
ニッケル製のプレス版をエンボス層に対して加熱押圧す
ることにより回折格子パターンを形成した。その後エン
ボス層上に厚さ５００Åのアルミニウムを真空蒸着法に
より成膜し、反射層を形成した。更にアクリル系樹脂を
主成分とする接着剤を塗布し接着層を形成し、転写箔を
得た。First, a transfer foil for forming a diffraction grating pattern portion on a substrate is manufactured. As a support film,
Polyester was used. Next, an acrylic resin and a urethane resin are made into a paint, coated on a support film by a bar coating method, and dried to form a peelable protective layer and an embossed layer each having a thickness of 2 μm, and then unevenness of a diffraction grating is formed A diffraction grating pattern was formed by heating and pressing the nickel press plate against the embossed layer. After that, aluminum having a thickness of 500 Å was formed on the embossed layer by a vacuum vapor deposition method to form a reflective layer. Further, an adhesive containing an acrylic resin as a main component was applied to form an adhesive layer to obtain a transfer foil.
【００３０】次に、実質的に可視光領域に吸収がなく、
赤外光を吸収する赤外線吸収物質を含むインキを製造す
る。Next, there is virtually no absorption in the visible light region,
An ink containing an infrared absorbing substance that absorbs infrared light is manufactured.
【００３１】下記の組成を有する第二銅含有リン酸塩系
組成物について融解しかつこれを結晶化させて第二銅含
有リン酸塩系白色結晶化合物を求めた。A cupric acid-containing phosphate-based composition having the following composition was melted and crystallized to obtain a cupric acid-containing phosphate-based white crystalline compound.
【００３２】〔第二銅含有リン酸塩系組成物〕 Ｐ2 Ｏ5 ５０．０重量％ ＣｕＯ ４９．５重量％ ＺｎＯ ０．５重量％[Copper-containing phosphate composition] P 2 O 5 50.0% by weight CuO 49.5% by weight ZnO 0.5% by weight
【００３３】尚、この化合物について銅の管球（ＣｕＫ
α）を用いてＸ線回折を行ったところ、回折角（２θ）
＝２８．１４、３０．０７、３０．３４、４４．０１に
強いピークが表れ、結晶化されていることが確認されて
いる。Regarding this compound, a copper tube (CuK
When X-ray diffraction was performed using α), the diffraction angle (2θ)
= 28.14, 30.07, 30.34, and 44.01 have strong peaks, and it is confirmed that they are crystallized.
【００３４】次に、この第二銅含有リン酸塩系白色結晶
を粉砕して粉末化し、これを赤外線吸収性顔料として下
記組成のインキを調製した。Next, the cupric-containing phosphate-based white crystals were crushed into powder, and an infrared absorbing pigment was used to prepare an ink having the following composition.
【００３５】 〔インキの組成〕 顔料（第二銅含有リン酸塩系白色結晶化合物） ３０重量部 塩酢酸ビニル系樹脂（積水化学工業社製 商品名エレックスＡ）１０重量部 飽和ポリエステル（東洋紡績社製 商品名バイロン１０３） ５重量部 ポリウレタンエラストマー １２重量部 （日本ポリウレタン工業社製 商品名Ｎ−２３０４） イソシアナート硬化剤 ３重量部 トリエチレンジアミン ０．５重量部 溶剤（トルエン／メチルイソブチルケトン） ６０重量部[Composition of ink] Pigment (cupric acid-containing white crystalline compound containing cupric acid) 30 parts by weight Vinyl acetate vinyl resin (trade name Elex A manufactured by Sekisui Chemical Co., Ltd.) 10 parts by weight Saturated polyester (Toyobo Co., Ltd.) Product name Byron 103) 5 parts by weight Polyurethane elastomer 12 parts by weight (Nippon Polyurethane Industry Co., Ltd. product name N-2304) Isocyanate curing agent 3 parts by weight Triethylenediamine 0.5 parts by weight Solvent (toluene / methyl isobutyl ketone) 60 parts by weight Department
【００３６】なお、このインキは、可視光領域（波長３
８０ｎｍ〜７００ｎｍ）においての吸収率が１０％以下
であるが、７８０ｎｍの近赤外線において８０％以上の
吸収を示す。This ink has a visible light region (wavelength 3
The absorption rate at 80 nm to 700 nm) is 10% or less, but at 80% or more in the near infrared ray of 780 nm.
【００３７】次に上記インキ及び転写箔を用いて、図
１、図２に記載の構成の情報記録媒体を製造する。Next, using the above ink and transfer foil, an information recording medium having the structure shown in FIGS. 1 and 2 is manufactured.
【００３８】〔情報記録媒体の製造〕ポリエチレンから
なるカード状の基材１上に上記インキを全面的に印刷
し、赤外線吸収層２を設けた後、その上に赤外線を透過
する性質を備えた黄色のプロセスインキ（東洋インキ製
造社製 商品名ＦＤＯＬ）を全面的に印刷し、絵柄印刷
層３を設けた。次いで上記転写箔を加熱押圧し、基材上
に回折格子パターン部４を形成した。[Production of Information Recording Medium] The above ink was entirely printed on a card-shaped substrate 1 made of polyethylene, an infrared absorbing layer 2 was provided, and then infrared rays were transmitted therethrough. A yellow process ink (trade name FDOL manufactured by Toyo Ink Mfg. Co., Ltd.) was printed on the entire surface to provide a pattern printing layer 3. Next, the transfer foil was heated and pressed to form the diffraction grating pattern portion 4 on the base material.
【００３９】この回折格子パターン部に照射光としてレ
ーザー光を照射したところ、読み取りセンサーには、図
６に記載したような良好な出力波形を得ることができ
た。When this diffraction grating pattern portion was irradiated with laser light as irradiation light, a good output waveform as shown in FIG. 6 could be obtained on the reading sensor.
【００４０】[0040]
【発明の効果】以上、説明したように本発明に係わる情
報記録媒体によれば、可視光領域に吸収がなく赤外光領
域に吸収を有する赤外線吸収層を有するため、白色基材
および印刷インキによる反射光が生じず、正確な情報を
提供することが可能であり、かつその色が白、もしくは
薄膜が薄い場合には透明であることからカラーマッチン
グが容易であるため絵柄のデザインが規制されない。よ
って、正確な情報が提供でき、かつ装飾効果の高い情報
記録媒体を得ることができる。As described above, the information recording medium according to the present invention has the infrared absorbing layer which does not absorb in the visible light region but absorbs in the infrared light region. Reflected light does not occur, and accurate information can be provided, and because the color is white or transparent when the thin film is thin, color matching is easy, so the design of the design is not restricted. . Therefore, it is possible to provide an information recording medium that can provide accurate information and have a high decorative effect.
【００４１】[0041]
【図１】本発明の情報記録媒体の一実施例を示す構成図
である。FIG. 1 is a configuration diagram showing an embodiment of an information recording medium of the present invention.
【図２】本発明の情報記録媒体の一実施例を示す構成図
である。FIG. 2 is a configuration diagram showing an embodiment of an information recording medium of the present invention.
【図３】絵柄印刷部上の回折格子パターンの一例を示す
平面図である。FIG. 3 is a plan view showing an example of a diffraction grating pattern on a pattern printing unit.
【図４】回折格子パターン読み取り方法の一例を示す概
略図である。FIG. 4 is a schematic diagram showing an example of a diffraction grating pattern reading method.
【図５】読み取りセンサー部の平面図である。FIG. 5 is a plan view of a reading sensor unit.
【図６】赤外線吸収層を有してない情報記録媒体での回
折格子パターンの読み取り波形を示すグラフ図である。FIG. 6 is a graph showing a reading waveform of a diffraction grating pattern on an information recording medium having no infrared absorption layer.
【図７】本発明の情報記録媒体の回折格子パターンの読
み取り波形を示すグラフ図である。FIG. 7 is a graph showing a reading waveform of a diffraction grating pattern of the information recording medium of the present invention.
１ 基材 ２ 赤外線吸収層 ３ 絵柄印刷層 ４ 回折格子パターン部 ４ａ 回折格子がＡ方向の回折格子 ４ｂ 回折格子がＢ方向の回折格子 ７ 読み取りセンサー部 ８ 照射光 ９ 回折光 １０ Ａ方向回折光を受光するセンサー １１ Ｂ方向回折光を受光するセンサー １２ 光源 DESCRIPTION OF SYMBOLS 1 Base material 2 Infrared absorbing layer 3 Pattern printing layer 4 Diffraction grating pattern part 4a Diffraction grating in the A direction 4b Diffraction grating in the B direction 7 Reading sensor unit 8 Irradiated light 9 Diffracted light 10 A direction diffracted light Sensor that receives light 11 Sensor that receives diffracted light in the B direction 12 Light source
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ０２Ｂ 5/18 9018−2Ｋ Ｇ０６Ｋ 19/06 19/10 8623−5Ｌ Ｇ０６Ｋ 19/00 Ｒ (72)発明者 小林 昭彦 東京都台東区台東一丁目５番１号 凸版印 刷株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical display location G02B 5/18 9018-2K G06K 19/06 19/10 8623-5L G06K 19/00 R (72) Inventor Akihiko Kobayashi 1-5-1, Taito, Taito-ku, Tokyo Within Toppan Printing Co., Ltd.
Claims (2)
く、赤外光を吸収する赤外線吸収物質を含有する赤外線
吸収層と回折格子パターン部を少なくとも有することを
特徴とする情報記録媒体。1. Information having at least an infrared absorbing layer containing an infrared absorbing substance which does not substantially absorb in the visible light region and absorbs infrared light, and a diffraction grating pattern portion on a substrate. recoding media.
分とし、Ｆｅ2+及び／又はＣｕ2+を含有するリン酸塩系
白色結晶粉末であることを特徴とする請求項１記載の情
報記録媒体。2. The information according to claim 1, wherein the infrared absorbing substance is a phosphate-based white crystalline powder containing phosphorus pentoxide as a main component and Fe 2+ and / or Cu 2+. recoding media.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5046645A JPH06255292A (en) | 1993-03-08 | 1993-03-08 | Information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5046645A JPH06255292A (en) | 1993-03-08 | 1993-03-08 | Information recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06255292A true JPH06255292A (en) | 1994-09-13 |
Family
ID=12753053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5046645A Pending JPH06255292A (en) | 1993-03-08 | 1993-03-08 | Information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06255292A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7333526B2 (en) * | 2002-11-26 | 2008-02-19 | Intel Corporation | Coarse spectrometer with a grating |
-
1993
- 1993-03-08 JP JP5046645A patent/JPH06255292A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7333526B2 (en) * | 2002-11-26 | 2008-02-19 | Intel Corporation | Coarse spectrometer with a grating |
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