JPH0639189B2 - Light card - Google Patents
Light cardInfo
- Publication number
- JPH0639189B2 JPH0639189B2 JP59253751A JP25375184A JPH0639189B2 JP H0639189 B2 JPH0639189 B2 JP H0639189B2 JP 59253751 A JP59253751 A JP 59253751A JP 25375184 A JP25375184 A JP 25375184A JP H0639189 B2 JPH0639189 B2 JP H0639189B2
- Authority
- JP
- Japan
- Prior art keywords
- recording
- optical
- recording layer
- layer
- card
- 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.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
- G11B7/245—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing a polymeric component
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/24003—Shapes of record carriers other than disc shape
- G11B7/24012—Optical cards
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
- G11B7/246—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
- G11B7/2542—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers consisting essentially of organic resins
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
- G11B7/2595—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers based on gold
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Description
【発明の詳細な説明】 Ｉ 発明の背景 技術分野 本発明は、光カード、特にヒートモードの光記録を行う
光カードに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical card, and more particularly to an optical card for performing heat mode optical recording.
先行技術とその問題点 一般に、情報の記録および再生として磁気記録方式が広
く知られている。例えば、磁気テープ、磁気ディスク、
磁気カード等の磁気記録媒体が挙げられる。この一つの
利用例としてキャッシュカード等として使用されている
磁気カードがある。Prior Art and Problems Thereof In general, a magnetic recording method is widely known for recording and reproducing information. For example, magnetic tape, magnetic disk,
A magnetic recording medium such as a magnetic card may be used. One example of this use is a magnetic card used as a cash card or the like.
周知のように磁気記録再生方式は、情報の記録、消去お
よび再記録を容易に行うことができる。従って、この方
式を利用した磁気カードは、悪用されたりまたは磁石等
による磁場の中に置かれると記録されている情報に変化
が生ずるなど情報の信頼性は低い。また、磁気カードは
磁気ヘッドの制約から低密度の情報の記録しかできず、
さらにカードの大きさに基づく制限から、極めて少量の
情報しか記録できないという欠点がある。従って、悪用
防止のために複雑な信号形態を取るという手段も、以上
の磁気カード上の制限から不可能である。As is well known, the magnetic recording / reproducing system can easily record, erase and re-record information. Therefore, a magnetic card using this method has a low reliability of information such as a change in recorded information when it is abused or placed in a magnetic field such as a magnet. In addition, the magnetic card can only record low density information due to the restrictions of the magnetic head,
Further, there is a drawback that only a very small amount of information can be recorded due to the limitation based on the size of the card. Therefore, the means of taking a complicated signal form for preventing abuse is impossible due to the above restrictions on the magnetic card.
これらの欠点を改善するものとして、光学的原理により
記録および再生方式が最近提案されている。この光学的
記録および再生方式によるものには、光ディスク、光カ
ード等が挙げられる。In order to improve these drawbacks, a recording and reproducing system has recently been proposed based on an optical principle. Examples of the optical recording and reproducing system include an optical disk and an optical card.
なかでも光カードの応用範囲は広く、銀行のキャッシュ
カードをはじめ、クレジットカード、身分証明書、運転
免許証、定期券、公衆電話カード、ガソリン購入カード
等、多種にわたって、その実用化が期待されている。Among them, optical cards have a wide range of applications, and are expected to be put into practical use in a wide variety of fields including bank cash cards, credit cards, identification cards, driver's licenses, commuter passes, public telephone cards, and gasoline purchase cards. There is.
ところで、光カードに適用しうる光記録媒体としてはヒ
ートモードのものがある。By the way, as an optical recording medium applicable to the optical card, there is a heat mode medium.
このヒートモードの光記録媒体は、記録光を熱として利
用する光記録媒体であり、その１例として、レーザー等
の記録光で媒体の一部を融解、除去等として、ピットと
称される***を形成して書き込みを行い、このピットに
より情報を記録し、このピットを読み出し光で検出して
読み出しを行うピト形成タイプのものがある。This heat mode optical recording medium is an optical recording medium that uses recording light as heat. One example thereof is a small hole called a pit for melting and removing a part of the medium with recording light such as a laser. There is a pit forming type in which a pit is formed and writing is performed, information is recorded by this pit, and the pit is detected by reading light to perform reading.
このようなピット形成タイプの媒体、特にそのうち、装
置を小型化できる半導体レーザーを光源とするものにお
いては、これまで、Ｔｅを主体とする材料を記録層とす
るものが大半をしめている。Most of the pit formation type media, especially those having a semiconductor laser as a light source, which can miniaturize the device, have a recording layer mainly made of a material containing Te.
しかし、近年、Ｔｅ系材料が有害であること、そしてよ
り高感度化する必要があること、より製造コストを安価
にする必要があることからＴｅ系にかえ、各種色素を主
とした有機材料系の記録層を用いる媒体についての提案
や報告が増加している。However, in recent years, Te-based materials are harmful, need to have higher sensitivity, and manufacturing costs need to be reduced. The number of proposals and reports on media using the above recording layer is increasing.
ところで、光カードでは、記録層の損傷防止のため、記
録層上に保護膜を形成する必要がある。そして、この保
護膜は基材とラミネートされるので、記録層と保護膜間
は密着される。By the way, in an optical card, it is necessary to form a protective film on the recording layer in order to prevent damage to the recording layer. Since the protective film is laminated with the base material, the recording layer and the protective film are in close contact with each other.
しかし、このように記録層と保護層とを密着させてピッ
トを形成すると、色素系の記録層ではコントラストおよ
びＳ／Ｎ比が小さいという欠点がある。However, when the recording layer and the protective layer are brought into close contact with each other to form a pit, the dye-based recording layer has a drawback that the contrast and the S / N ratio are small.
II 発明の目的 本発明の目的は、コントラストおよびＳ／Ｎ比の高い色
素系の記録層を有する光カードを提供することにある。II Object of the Invention An object of the present invention is to provide an optical card having a dye-based recording layer having a high contrast and a high S / N ratio.
III 発明の開示 このような目的は、下記の本発明によって達成される。III DISCLOSURE OF THE INVENTION Such an object is achieved by the present invention described below.
すなわち、本発明は、 基板と、記録層と反射層とを有する光記録部と、保護膜
とを有する光カードにおいて、記録層が色素と自己酸化
性の樹脂とを含有し、記録光の照射により記録部に記録
層と反射層との界面に気泡を発生させ、光記録部を変形
させるように構成したことを特徴とする光カードであ
る。That is, the present invention relates to an optical card having a substrate, an optical recording section having a recording layer and a reflective layer, and a protective film, wherein the recording layer contains a dye and a self-oxidizing resin, and the recording light irradiation is performed. The optical card is characterized in that a bubble is generated at the interface between the recording layer and the reflective layer in the recording section to deform the optical recording section.
IV 発明の具体的構成 以下、本発明の具体的構成について詳細に説明する。IV Specific Structure of the Invention Hereinafter, the specific structure of the present invention will be described in detail.
第１図には、本発明の実施例が示される。FIG. 1 shows an embodiment of the present invention.
第１図に示されるように、本発明の光カードは基板２を
有する。As shown in FIG. 1, the optical card of the present invention has a substrate 2.
基板２は、通常、熱可塑性の樹脂材質とし、アクリル樹
脂、ポリカーボネート、ポリ塩化ビニル、ポル塩化ビニ
ル、ナイロン、ポリオレフィン等のいずれであってもよ
い。The substrate 2 is usually made of a thermoplastic resin material, and may be any of acrylic resin, polycarbonate, polyvinyl chloride, polyvinyl chloride, nylon, polyolefin and the like.
ただ、印刷性、積層性、耐湿性、強度等を考慮すると、
ポリ塩化ビニル系のポリマーが好適である。ポリ塩化ビ
ニル系のポリマーとしては、塩化ビニルのホモポリマー
の外、塩化ビニル−酢酸ビニル、塩化ビニル−マレイン
酸等の塩化ビニルコポリマーであってよい。However, considering printability, stackability, moisture resistance, strength, etc.,
A polyvinyl chloride-based polymer is suitable. The polyvinyl chloride-based polymer may be a vinyl chloride homopolymer, or a vinyl chloride copolymer such as vinyl chloride-vinyl acetate or vinyl chloride-maleic acid.
基板２の厚さは０．１〜１．０mm程度とする。The thickness of the substrate 2 is about 0.1 to 1.0 mm.
基板２上には記録層３１が設層される。A recording layer 31 is provided on the substrate 2.
記録層としては、色素の組成物を用いる。A dye composition is used for the recording layer.
用いる色素としては、書き込む光および読み出し光の波
長に応じ、これを有効に吸収するもののなかから、適宜
決定すればよい。この場合、これらの光源としては、装
置を小型化できる点で、半導体レーザーを用いることが
好ましいので、色素はシアニン系、フタロシアニン系、
アントラキノン系、アゾ系、トリフェニルメタン系、ピ
リリウムないしチアピリリウム塩系等が好ましい。The dye to be used may be appropriately determined depending on the wavelengths of the writing light and the reading light and those that effectively absorb the light. In this case, as these light sources, since it is preferable to use a semiconductor laser from the viewpoint that the device can be downsized, the dye is cyanine-based, phthalocyanine-based,
Anthraquinone type, azo type, triphenylmethane type, pyrylium or thiapyrylium salt type and the like are preferable.
また、記録層には、ニトロセルロース等の自己酸化性の
樹脂を含有させる。また、ポリスチレン、ナイロン等の
熱可塑性樹脂を含有させることができる。また、色素の
酸化劣化を防止するため、クエンチャーを含有させるこ
ともできる。さらには、この他の添加剤を含有されても
よい。The recording layer contains a self-oxidizing resin such as nitrocellulose. Further, a thermoplastic resin such as polystyrene or nylon can be contained. Further, in order to prevent oxidative deterioration of the dye, a quencher may be contained. Furthermore, other additives may be contained.
このような場合、特に好ましくは、インドレニン系のシ
アニン色素とビスフェニルジオール系等のクエンチャー
との混合物が好ましい。In such a case, a mixture of an indolenine type cyanine dye and a bisphenyldiol type quencher is particularly preferable.
またこれらを色素のカチオンと、クエンチャーのアニオ
ンとのイオン結合体として用いるのも好ましい。It is also preferable to use these as an ionic bond between the cation of the dye and the anion of the quencher.
記録層には自己酸化性の樹脂が含有されているので、気
泡発生がより効率よくできるようになっている。Since the recording layer contains a self-oxidizing resin, bubbles can be generated more efficiently.
記録層の設層は、ケトン系、エステル系、エーテル系、
芳香族系、ハロゲン化アルキル系、アルコール系等の溶
媒を用いて塗布を行えばよい。The recording layer is composed of ketone, ester, ether,
Coating may be carried out using a solvent such as an aromatic type, an alkyl halide type, or an alcohol type.
あるいは、蒸着を行ってもよい。Alternatively, vapor deposition may be performed.
このような記録層は、０．０１〜１０μｍの厚さとすれ
ばよく、特に０．０５〜０．１μｍの厚さとすることが
好ましい。Such a recording layer may have a thickness of 0.01 to 10 μm, and particularly preferably a thickness of 0.05 to 0.1 μm.
記録層３１の上には反射層３５を設ける。これにより、
コントラストが向上する。この他、各種上地層、下地層
が設けられていてもよい。A reflective layer 35 is provided on the recording layer 31. This allows
The contrast is improved. In addition to this, various upper layers and base layers may be provided.
このような光記録部は、カードの用途に応じ、基板上
に、その全面または一部に、ストライプ状、矩形状等の
形状に設けられる。Such an optical recording unit is provided in a striped shape, a rectangular shape, or the like on the entire surface or a part of the substrate, depending on the application of the card.
また、光記録部は、第１図に示されるように、記録光の
照射により記録層３に気泡を発生させることによって変
形するように構成されている。Further, as shown in FIG. 1, the optical recording section is configured to be deformed by generating bubbles in the recording layer 3 by irradiation of recording light.
気泡は、通常、基板と反対方向に凸状に形成される。The bubbles are usually formed in a convex shape in the direction opposite to the substrate.
従って、光記録部において記録層３１の変形に伴って変
形する反射層３５を設層する場合、反射層は記録層の変
形に伴って変形可能な材質とするのがよく、例えばＡ
ｌ、Ａｕ、Ｂｉ、Ｉｎ、Ｓｎ、Ｇａ、Ｎｉ、Ｃｒ等が挙
げられる。Therefore, when the reflective layer 35 that deforms with the deformation of the recording layer 31 is provided in the optical recording portion, the reflective layer is preferably made of a material that can be deformed with the deformation of the recording layer.
1, Au, Bi, In, Sn, Ga, Ni, Cr and the like.
この反射層の厚さは、通常、１００〜１０００Å程度と
する。The thickness of this reflective layer is usually about 100 to 1000Å.
光記録部の上には、保護膜４が設けられる。A protective film 4 is provided on the optical recording portion.
保護膜４は、塗布によって形成することもできるが、通
常、フィルム体を融着ないし接着して形成する。Although the protective film 4 can be formed by coating, it is usually formed by fusing or adhering a film body.
保護膜４の材質としては、各種樹脂が好適であるが、特
に吸湿性、耐ヒッカキ性等の点で、前記のポリ塩化ビニ
ル系のポリマーが好適である。As the material of the protective film 4, various resins are suitable, but the above-mentioned polyvinyl chloride-based polymers are particularly preferred from the viewpoint of hygroscopicity, resistance to scratches and the like.
そして、その厚さは、０．１〜１．０mm程度とする。The thickness is about 0.1 to 1.0 mm.
これは、０．１mm未満となると、ホコリやゴミの影響で
記録・再生が阻害され、また１．０mmをこえると実用上
不適となるからである。This is because if it is less than 0.1 mm, recording and reproduction are hindered by the influence of dust and dust, and if it exceeds 1.0 mm, it becomes unsuitable for practical use.
なお、保護膜４は、各種ヒッカキ防止用の被覆層を有し
ていてもよい。In addition, the protective film 4 may have a coating layer for preventing various types of scratches.
また、基板は、その両面に光記録層および保護層を有し
てもよく、これらは片面のみに設けられていてもよい。Further, the substrate may have an optical recording layer and a protective layer on both sides thereof, and these may be provided on only one side.
後者の場合、基板裏面には保護層が形成されていてもよ
い。In the latter case, a protective layer may be formed on the back surface of the substrate.
このような保護膜４は、第１図に示すように、通常、光
記録層３と密着している。Such a protective film 4 is usually in close contact with the optical recording layer 3 as shown in FIG.
なお、保護膜４は、記録層３ないし基板２と接着ないし
融着される。The protective film 4 is adhered or fused to the recording layer 3 or the substrate 2.
Ｖ 発明の具体的効果 本発明によれば、コントラストおよびＳ／Ｎ比が向上し
た光カードが得られる。本発明者らは、本発明の効果を
確認するため種々の実験を行った。以下に一例を示す。V. Specific Effect of the Invention According to the present invention, an optical card with improved contrast and S / N ratio can be obtained. The present inventors conducted various experiments to confirm the effect of the present invention. An example is shown below.
実施例 ８５×５４×０．３mmの塩化ビニル樹脂性シート上に
０．０６μｍ厚にて１，１′，３，３，３′，３′−ヘ
キサメチル−４，４′，５，５′−ジベンゾ−２，２′
−インドトリカルボニンパークロレート（２重量部）
と、ＩＲＡ−ＰＡ−・１００６［三井東圧化学株式会社
製ビスフェニルジチオールＮｉ錯体］（１重量部）と、
ニトロセルロース（ＲＳ−８０）１重量部とからなる記
録層と、Ａｕの３００Å厚の反射層とを設層した。Example 1,1 ', 3,3,3', 3'-hexamethyl-4,4 ', 5,5'- with a thickness of 0.06 μm on a vinyl chloride resin sheet of 85 × 54 × 0.3 mm. Dibenzo-2,2 '
-Indotricarbonine perchlorate (2 parts by weight)
And IRA-PA-1006 [Bisphenyldithiol Ni complex manufactured by Mitsui Toatsu Chemicals, Inc.] (1 part by weight),
A recording layer composed of 1 part by weight of nitrocellulose (RS-80) and a reflective layer of Au having a thickness of 300 Å were provided.
この上に、塩化ビニル樹脂性０．３mm厚のシートを熱融
着した。On this, a vinyl chloride resin sheet having a thickness of 0.3 mm was heat-sealed.
上記のように記録層に気泡を発生させ、記録層を変形さ
せるように構成したものを、記録層にニトロセルロース
を含有せず、気泡を形成しないように記録したものと比
較すると、コントラストは格段と向上した。また、Ａｕ
反射層を積層せずに記録したものではＳ／Ｎは５dB程度
低下した。Compared with the recording layer containing no nitrocellulose and recording without forming bubbles, the contrast is remarkably high. And improved. Also, Au
In the case of recording without laminating the reflective layer, the S / N was lowered by about 5 dB.
第１図は、本発明の光カードの断面図である。 符号の説明 １……光カード、 ２……基板、 ３……光記録部、３１……記録層、 ３５……反射層、 ４……保護膜、 FIG. 1 is a sectional view of the optical card of the present invention. DESCRIPTION OF SYMBOLS 1 ... Optical card, 2 ... Substrate, 3 ... Optical recording unit, 31 ... Recording layer, 35 ... Reflecting layer, 4 ... Protective film,
フロントページの続き (72)発明者 保坂 洋 東京都台東区台東１丁目５番１号 東京磁 気印刷株式会社内 (72)発明者 三村 升平 東京都台東区台東１丁目５番１号 東京磁 気印刷株式会社内 (56)参考文献 特開 昭56−124136（ＪＰ，Ａ) 特開 昭56−124135（ＪＰ，Ａ) 特開 昭53−107854（ＪＰ，Ａ) 特開 昭58−146040（ＪＰ，Ａ) 特開 昭59−19253（ＪＰ，Ａ) 特開 昭59−5097（ＪＰ，Ａ) 特開 昭59−193558（ＪＰ，Ａ) 実開 昭59−99778（ＪＰ，Ｕ)Front page continuation (72) Inventor Hiroshi Hosaka 1-5-1 Taito, Taito-ku, Tokyo Within Tokyo Magnetic Printing Co., Ltd. (72) Inventor Ryohei Mimura 1-1-5 Taito, Taito-ku, Tokyo Tokyo Magnetic Printing Co., Ltd. (56) Reference JP-A-56-124136 (JP, A) JP-A-56-124135 (JP, A) JP-A-53-107854 (JP, A) JP-A-58-146040 (JP , A) JP 59-19253 (JP, A) JP 59-5097 (JP, A) JP 59-193558 (JP, A) Actual development JP 59-99778 (JP, U)
Claims (1)
部と、保護膜とを有する光カードにおいて、記録層が色
素と自己酸化性の樹脂とを含有し、記録光の照射により
記録部に記録層と反射層との界面に気泡を発生させ、光
記録部を変形させるように構成したことを特徴とする光
カード。1. An optical card having a substrate, an optical recording portion having a recording layer and a reflective layer, and a protective film, wherein the recording layer contains a dye and a self-oxidizing resin, and is irradiated with recording light. An optical card characterized in that a bubble is generated at an interface between a recording layer and a reflective layer in a recording section to deform the optical recording section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59253751A JPH0639189B2 (en) | 1984-11-30 | 1984-11-30 | Light card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59253751A JPH0639189B2 (en) | 1984-11-30 | 1984-11-30 | Light card |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61132381A JPS61132381A (en) | 1986-06-19 |
| JPH0639189B2 true JPH0639189B2 (en) | 1994-05-25 |
Family
ID=17255631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59253751A Expired - Lifetime JPH0639189B2 (en) | 1984-11-30 | 1984-11-30 | Light card |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0639189B2 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53107854A (en) * | 1977-03-03 | 1978-09-20 | Canon Inc | Recording medium |
| FR2475270A1 (en) * | 1980-02-01 | 1981-08-07 | Thomson Csf | REVERSIBLE MEMORY STRUCTURE, THERMO-OPTICAL INTEGRATION AND OPTICAL READING, AND METHOD FOR INSCRIPTION AND ERASURE OF THIS STRUCTURE |
| FR2475271A1 (en) * | 1980-02-01 | 1981-08-07 | Thomson Csf | PERMANENT MEMORY STRUCTURE, THERMO-OPTICAL REGISTRATION AND OPTICAL READING, AND METHOD OF REGISTRATION IN SUCH A STRUCTURE |
| JPS58146040A (en) * | 1982-02-24 | 1983-08-31 | Pioneer Video Kk | Optical system information recording original disk |
| JPS595097A (en) * | 1982-07-02 | 1984-01-11 | Nec Corp | Optical recording system |
| JPS5919253A (en) * | 1982-07-23 | 1984-01-31 | Sony Corp | Information recording medium |
| JPS5999778U (en) * | 1982-12-24 | 1984-07-05 | 共同印刷株式会社 | ID card with optical memory medium |
| JPS59193558A (en) * | 1983-04-15 | 1984-11-02 | Tdk Corp | Optical card |
-
1984
- 1984-11-30 JP JP59253751A patent/JPH0639189B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61132381A (en) | 1986-06-19 |
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