JPH0568016B2 - - Google Patents

Info

Publication number
JPH0568016B2
JPH0568016B2 JP59095602A JP9560284A JPH0568016B2 JP H0568016 B2 JPH0568016 B2 JP H0568016B2 JP 59095602 A JP59095602 A JP 59095602A JP 9560284 A JP9560284 A JP 9560284A JP H0568016 B2 JPH0568016 B2 JP H0568016B2
Authority
JP
Japan
Prior art keywords
film
dye
present
storage medium
information storage
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
Application number
JP59095602A
Other languages
Japanese (ja)
Other versions
JPS60239947A (en
Inventor
Michiharu Abe
Masaaki Umehara
Tsutomu Sato
Hideaki Ooba
Yutaka Ueda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP59095602A priority Critical patent/JPS60239947A/en
Publication of JPS60239947A publication Critical patent/JPS60239947A/en
Publication of JPH0568016B2 publication Critical patent/JPH0568016B2/ja
Granted legal-status Critical Current

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
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • 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

Landscapes

  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

〔技術分野〕 本発明は基板上に光吸収反射性の色素膜を有す
る光学的情報記憶媒体に関する。さらに詳しく
は、本発明はレーザビームを集光して照射するこ
とにより記録層に情報を記憶するための情報記憶
媒体に関する。 〔従来技術〕 従来、色素薄膜を記録層として用いる光学的情
報記憶媒体が種々知られている。第１図に示すよ
うに、この種の光学的情報記憶媒体１は透明基板
２と色素膜３とから構成されるものである。 光学的情報記憶媒体１として使用する場合に
は、レーザビーム４を集光レンズ５により基板２
側から集光照射して記録再生を行なう方法が知ら
れており、基板２を透明にする必要がある。情報
の記録はレーザビーム４を大きいパワーで照射し
色素膜３は、自ら吸収した光エネルギーによつて
熱的に変化し小孔（ピツト）が形成され小孔の有
無によつて行なわれる。一方、情報の再生は、色
素膜を破壊しない小さいパワーでレーザビームを
照射し色素膜からの反射光によつて小孔の有無を
検出することによつて行なわれる。かかる構成の
記憶媒体は塗布という極めて生産性の高い方法に
よつて製造できるため低コストで工業生産できる
という利点を有しているが、反面色素膜を反射率
が高くしかも均一性がよく形成することはかなり
困難であるのが現状である。 〔目的〕 本発明の目的は基板上に光吸収反射性の色素膜
を有する光学的情報記憶媒体において製造安定性
および反射率の均一性が得られるようにし記憶媒
体の信頼性を向上させることにある。 〔構成〕 本発明者は第１図に示すような構成の光学的情
報記憶媒体における色素膜の色素としてシアニン
色素、トリアリルメタン系色素などの光吸収係数
の高い色素を使用して光吸収と同時に20〜30％の
金属並みの高い反射率が得られることを先に提案
してきたが、色素膜を反射率が高くしかも均一性
よく形成するための条件はいまだ検討されていな
かつた。そこで、本発明者は上記目的を達成する
ために色素膜について種々研究を重ねた結果色素
膜の膜厚が重要な要因であることを見出し本発明
をなすに至つたものである。すなわち、本発明は
光吸収反射性の色素膜の膜厚を反射率が最大にな
るように設定することにある。本発明で使用され
る色素は特に限定されず20〜30％の金属並みの高
い反射率を与えるようなものを適宜選択すること
ができる。 また、本発明における色素膜は色素単独で構成
される必要はなく、他の色素との混合、ニツケル
錯体などの安定化剤との混合によつて形成されて
いてもよい。また、このような色素膜にはこの他
高分子物質、各種可塑剤、界面活性剤、帯電防止
剤、滑剤、難燃剤、分散剤などが含有されていて
もよい。また色素膜の上には必要に応じ保護層を
設けてもよいしあるいは色素膜の下には必要に応
じ下引層を設けてもよい。 色素膜を設ける基板の材質には特に制限はなく
各種プラスチツク、ガラス、セラミツクス、金属
などいずれであつてもよい。また、本発明の記録
媒体はこのような基板の一面上に上記の色素膜を
有するものであつてもよくあるいはその両面に色
素膜を有するものであつてもよい。さらに、基板
の一面上に色素膜を設けたものを一対とし色素膜
が対向するように配置したいわゆるサンドイツチ
構造にすることもできる。 次に、実施例をあげて本発明による膜厚と反射
率との関係を説明する。例えば構造式 [Technical Field] The present invention relates to an optical information storage medium having a light-absorbing and reflective dye film on a substrate. More specifically, the present invention relates to an information storage medium for storing information in a recording layer by condensing and irradiating a laser beam. [Prior Art] Conventionally, various optical information storage media using a dye thin film as a recording layer are known. As shown in FIG. 1, this type of optical information storage medium 1 is composed of a transparent substrate 2 and a dye film 3. When used as an optical information storage medium 1, a laser beam 4 is directed onto a substrate 2 by a condensing lens 5.
A method is known in which recording and reproduction are performed by irradiating condensed light from the side, and the substrate 2 needs to be transparent. Information is recorded by irradiating the laser beam 4 with high power, and the dye film 3 is thermally changed by the absorbed light energy to form small holes (pits), depending on the presence or absence of the small holes. On the other hand, information is reproduced by irradiating a laser beam with a low power that does not destroy the pigment film and detecting the presence or absence of small holes based on the light reflected from the pigment film. A storage medium having such a structure can be manufactured by coating, which is an extremely productive method, and has the advantage of being industrially produced at low cost. The current situation is that this is quite difficult. [Objective] The object of the present invention is to improve the reliability of an optical information storage medium having a light-absorbing and reflective dye film on a substrate by achieving manufacturing stability and reflectance uniformity. be. [Structure] The present inventor used dyes with high light absorption coefficients such as cyanine dyes and triallylmethane dyes as dyes in the dye film in an optical information storage medium having the structure shown in FIG. 1 to improve light absorption. At the same time, it has been proposed that a high reflectance of 20 to 30%, comparable to that of metals, can be obtained, but the conditions for forming a pigmented film with high reflectance and good uniformity have not yet been investigated. Therefore, in order to achieve the above object, the present inventor conducted various studies on pigment films and found that the thickness of the pigment film is an important factor, leading to the present invention. That is, the present invention is to set the thickness of the light-absorbing and reflective dye film so that the reflectance is maximized. The dye used in the present invention is not particularly limited, and can be appropriately selected to provide a high reflectance of 20 to 30%, comparable to that of metals. Furthermore, the dye film in the present invention does not need to be composed of a dye alone, and may be formed by mixing it with other dyes or with a stabilizer such as a nickel complex. In addition, such a pigment film may contain other polymeric substances, various plasticizers, surfactants, antistatic agents, lubricants, flame retardants, dispersants, and the like. Further, a protective layer may be provided on the dye film, if necessary, or a subbing layer may be provided below the dye film, if necessary. The material of the substrate on which the dye film is provided is not particularly limited, and may be any of various plastics, glass, ceramics, metals, etc. Further, the recording medium of the present invention may have the above-described dye film on one surface of such a substrate, or may have dye films on both surfaces thereof. Furthermore, it is also possible to form a so-called sanderch structure in which a pair of substrates each having a dye film provided on one surface are arranged so that the dye films face each other. Next, the relationship between film thickness and reflectance according to the present invention will be explained with reference to Examples. For example, structural formula

【化】 のシアニン色素（日本感光色素研究所NK2014）
および構造式Cyanine dye (Japan Photosensitive Pigment Research Institute NK2014)
and structural formula

〔効果〕〔effect〕

本発明によれば均一で高い反射率を示す色素膜
が得られるので反射型光デイスクメモリに適した
特性が与えられるとともにマクロ的あるいはミク
ロ的な色素膜厚のばらつきに対して反射率の変動
を最小に押えることを可能にすることができる。 According to the present invention, it is possible to obtain a pigment film that is uniform and exhibits high reflectance, which provides characteristics suitable for reflective optical disk memories, and also prevents changes in reflectance due to macroscopic or microscopic variations in pigment film thickness. It can be possible to suppress it to a minimum.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明に係る光学的情報記憶媒体の構
成例を示す図であり、第２図および第３図は本発
明による色素膜の膜厚と反射率との関係を示す図
でありそして第４図は本発明に係る光学的情報記
憶媒体の好適な例を示す図である。 １……光学的情報記憶媒体、２……基板、３…
…色素膜、４……レーザビーム、５……集光レン
ズ、６……プレグルーブまたはピツト。 FIG. 1 is a diagram showing an example of the configuration of an optical information storage medium according to the present invention, and FIGS. 2 and 3 are diagrams showing the relationship between the film thickness and reflectance of the pigment film according to the present invention. FIG. 4 is a diagram showing a preferred example of the optical information storage medium according to the present invention. 1... Optical information storage medium, 2... Substrate, 3...
...Pigment film, 4...Laser beam, 5...Condensing lens, 6...Pregroove or pit.

Claims (1)

【特許請求の範囲】[Claims] １ 基板上に反射率が最大になるように設定され
た膜厚を有する光吸収反射性の色素膜を設けたこ
とを特徴とする光学的情報記憶媒体。1. An optical information storage medium characterized in that a light-absorbing and reflective dye film having a film thickness set to maximize reflectance is provided on a substrate.
JP59095602A 1984-05-15 1984-05-15 optical information storage medium Granted JPS60239947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59095602A JPS60239947A (en) 1984-05-15 1984-05-15 optical information storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59095602A JPS60239947A (en) 1984-05-15 1984-05-15 optical information storage medium

Publications (2)

Publication Number Publication Date
JPS60239947A JPS60239947A (en) 1985-11-28
JPH0568016B2 true JPH0568016B2 (en) 1993-09-28

Family

ID=14142097

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59095602A Granted JPS60239947A (en) 1984-05-15 1984-05-15 optical information storage medium

Country Status (1)

Country Link
JP (1) JPS60239947A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63276722A (en) * 1987-05-08 1988-11-15 Toshiba Corp Optical information recording medium
JPH022066A (en) * 1988-06-15 1990-01-08 Ricoh Co Ltd Optical data recording medium and recording method
US5155723A (en) * 1988-07-30 1992-10-13 Yuden Co., Ltd. Taiyo Optical information recording method and medium
DE68921453T2 (en) * 1988-12-28 1995-07-13 Canon Kk Information recording media.
JP2899008B2 (en) * 1989-03-07 1999-06-02 富士写真フイルム株式会社 Information recording medium
JP3141998B2 (en) * 1989-06-12 2001-03-07 富士写真フイルム株式会社 Information recording medium

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097895A (en) * 1976-03-19 1978-06-27 Rca Corporation Multilayer optical record
NL7900281A (en) * 1979-01-15 1980-07-17 Philips Nv OPTICAL REGISTRATION DEVICE AND A METHOD FOR RECORDING INFORMATION ALONG OPTICAL ROAD.
US4336545A (en) * 1980-12-18 1982-06-22 Eastman Kodak Company Optical disc structure, method and apparatus physically optimized for writing and reading with a single wavelength
JPS5924692A (en) * 1982-07-30 1984-02-08 Tdk Corp Optical recording medium
JPS59135640A (en) * 1983-01-25 1984-08-03 Tdk Corp Optical recording medium
NL8301632A (en) * 1983-05-09 1984-12-03 Philips Nv REGISTRATION HOLDER IN WHICH INFORMATION CAN BE REGISTERED AND READ OUT BY OPTICAL ROAD.
JPH0740377B2 (en) * 1983-08-30 1995-05-01 ティーディーケイ株式会社 Optical recording medium

Also Published As

Publication number Publication date
JPS60239947A (en) 1985-11-28

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