JPS60251524A - Reproducing method of optical information recording medium - Google Patents
Reproducing method of optical information recording mediumInfo
- Publication number
- JPS60251524A JPS60251524A JP59107374A JP10737484A JPS60251524A JP S60251524 A JPS60251524 A JP S60251524A JP 59107374 A JP59107374 A JP 59107374A JP 10737484 A JP10737484 A JP 10737484A JP S60251524 A JPS60251524 A JP S60251524A
- Authority
- JP
- Japan
- Prior art keywords
- recording layer
- recording medium
- reproducing
- optical information
- 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
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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
Abstract
Description
【発明の詳細な説明】 〔技術分野〕 本発明は光情報記録媒体の再生方法に関する。[Detailed description of the invention] 〔Technical field〕 The present invention relates to a method for reproducing an optical information recording medium.
従来、光情報記録媒体としてはガラスまたはプラスチッ
ク基鈑上に記録層として例えばテルルを主体とする低融
点金属薄膜層を形成しビームレーザ光による溶融蒸発を
原理とした四部（ピット）を形成して情報を記録する方
式のものが使用されてきた。一方、かかる記録媒体の情
報再生は記録層の温度が記録材料の融点または相転移点
を越えないように再生条件を設定し記録時のレーザ出力
よ多出力を下げピットの有無による反射光の強弱を検出
することによシ行なわれる。ところが、本発明者等が先
に提案したような有機色素材料を記録層に使用する場合
には色素材料は必ずしも融点が確認されない場合があ多
金属薄膜層に対する再生条件をそのまま適用できないの
が現状である。Conventionally, optical information recording media have been produced by forming a thin film layer of a low-melting metal, mainly tellurium, as a recording layer on a glass or plastic substrate, and forming four parts (pits) on the principle of melting and evaporation using a beam laser beam. A method for recording information has been used. On the other hand, when reproducing information from such a recording medium, the reproducing conditions are set so that the temperature of the recording layer does not exceed the melting point or phase transition point of the recording material, and the laser output during recording is lowered to reduce the intensity of reflected light depending on the presence or absence of pits. This is done by detecting the However, when an organic dye material as previously proposed by the present inventors is used in the recording layer, the melting point of the dye material may not necessarily be confirmed, and the current situation is that the playback conditions for a multimetal thin film layer cannot be directly applied. It is.
本発明は上記現状に鑑みてなされたものであって、その
目的は有機色素を含む記録層を有する光情報記録媒体の
適切な再生条件を与えることである。The present invention has been made in view of the above-mentioned current situation, and its purpose is to provide appropriate reproduction conditions for an optical information recording medium having a recording layer containing an organic dye.
本発明者等は有機色素材料が融点以外に昇華点および／
または熱分解点などをもつ可能性があることから従来の
金属記録材料のように融点を考慮しただけでは情報の再
生条件を適切に設定できないことに着目し種々の色素材
料を検討した結果色素を含む記録層の温度が記録層およ
び他の層の融点および／または昇華点および／または熱
分解点のいずれをも越えると再生劣化が著しく増大する
ことを見出し本発明をなすに至った。The present inventors have discovered that the organic dye material has a sublimation point and/or
We focused on the fact that it is not possible to appropriately set information reproduction conditions just by considering the melting point as with conventional metal recording materials, and as a result of examining various dye materials, we found that The present inventors have discovered that when the temperature of the recording layer exceeds the melting point and/or sublimation point and/or thermal decomposition point of the recording layer and other layers, reproduction deterioration significantly increases.
すなわち、本発明は有機色素を含む記録層を有する光情
報記録媒体から情報を再生する際に再生光照射時におけ
る記録層の温度が前記記録層および必要に応じて設けら
れる他の層の融点および／または昇華点および／または
熱分解点のいずれをも越えないように再生光の走査速度
、パワーおよびビーム径を設定することを特徴とする光
情報記録媒体の再生方法を提供することにある。記録層
以外の他の層としては例えばプレグルーブ層、下引ぎ層
、保護層などがある。That is, in the present invention, when reproducing information from an optical information recording medium having a recording layer containing an organic dye, the temperature of the recording layer at the time of irradiation with reproduction light is equal to or lower than the melting point of the recording layer and other layers provided as necessary. An object of the present invention is to provide a method for reproducing an optical information recording medium, characterized in that the scanning speed, power, and beam diameter of reproducing light are set so as not to exceed either a sublimation point and/or a thermal decomposition point. Examples of layers other than the recording layer include a pregroove layer, an undercoat layer, and a protective layer.
本発明の再生条件は有機色素を含む記録層を有する光情
報記録媒体に広く適用できる。記録層はシアニン色素、
メロシアニン色素、トリフェニルメタン系色素、フタロ
シアニン系色素などに代表されこれらに制限されない有
機色素単独またはそれらの組合・せによって形成される
ものであって記録層の形成にあたってはバインダー、安
定化剤（例えば遷移金属錯体）などこの分野で用いられ
る他の成分を添加することができる。The reproduction conditions of the present invention can be widely applied to optical information recording media having recording layers containing organic dyes. The recording layer is cyanine dye,
A recording layer is formed by using organic dyes such as merocyanine dyes, triphenylmethane dyes, phthalocyanine dyes, etc., but is not limited to these dyes alone or in combination or combination thereof. Other components used in this field can be added, such as transition metal complexes).
また、本発明による情報の再生に用いられるレーザは有
機色素の吸収波長に応じて選択する必要があるが、その
例としてはＮ２、Ｈｅ−Ｃｄ１Ａｒ、Ｈｅ−Ｎｅ、ルビ
ー、色素、半導体レーザなどをあげることができる。そ
のうち半導体レーザは再生装置の小型化に寄与するので
好ましい。Further, the laser used for reproducing information according to the present invention must be selected according to the absorption wavelength of the organic dye, and examples thereof include N2, He-Cd1Ar, He-Ne, ruby, dye, semiconductor laser, etc. I can give it to you. Among these, semiconductor lasers are preferred because they contribute to miniaturization of the reproducing device.
次に代表的な実施例をあげて本発明による再生条件の決
定方法を説明するが本発明はこれのみに限定されるもの
ではない。Next, a method for determining regeneration conditions according to the present invention will be explained using typical examples, but the present invention is not limited to these examples.
ポリメチルメタクリレート基板上に式
のシアニン色素（日本感光色素研究所ＮＫ２Ｏ１４）ま
たは式
のシアニン色素（日本感光色素研究所ＮＫ２８８３）の
ジクロルエタン溶液をスピナー塗布して膜厚５００人の
色素記録層を設は記録媒体を作製した。A dichloroethane solution of the cyanine dye of the formula (Japan Photosensitive Color Research Institute NK2O14) or the cyanine dye of the formula (Japan Photosensitive Color Research Institute NK2883) was coated on a polymethyl methacrylate substrate using a spinner to form a dye recording layer with a film thickness of 500. A recording medium was produced.
記録層の波長７９０ ｎｍにおける反射率と透過率はそ
れぞれ２９％と１５％であった。次に基板の比熱、比重
および熱伝導率をそれぞれ１．５ Ｊ、ｚｔ ・ｄｅｇ
、１．２ｆ／ｃｍ’および２．Ｉ Ｘ １０−’Ｊ／ｍ
・ｓｅｃ・ｄｅｇとしそして記録層の比熱および比重を
膜厚が薄いことを考慮して基板と同一にして、記録媒体
に再生光を照射した場合の記録層温度を一次元熱伝導方
程式を用いて計算した（ただし、差分状近似による数値
計算）。その結果を第１図および第２図に示す。この結
果は記録層の膜厚が薄く且つ再生光の照射時間が短いた
め一次元近似でもよい近似を与えることがわかった。し
かも、−次元のためその結果は実際より必ず低目に出る
から図に示した結果を用い再生光の走査速度、パワーお
よびビーム径の選定が可能となる。The reflectance and transmittance of the recording layer at a wavelength of 790 nm were 29% and 15%, respectively. Next, the specific heat, specific gravity, and thermal conductivity of the substrate are 1.5 J, zt・deg, respectively.
, 1.2f/cm' and 2. I X 10-'J/m
・sec・deg, and the specific heat and specific gravity of the recording layer are made the same as those of the substrate considering the thin film thickness, and the temperature of the recording layer when the recording medium is irradiated with reproduction light is calculated using a one-dimensional heat conduction equation. Calculated (numerical calculation using difference-like approximation). The results are shown in FIGS. 1 and 2. This result shows that a one-dimensional approximation can provide a good approximation because the recording layer is thin and the reproduction light irradiation time is short. Furthermore, because of the -dimensionality, the results always appear lower than the actual results, so the scanning speed, power, and beam diameter of the reproduction light can be selected using the results shown in the figure.
なお、上記実施例以外の有機色素を用いる記録媒体につ
いても同様な実験を行なったところ、本発明の方法がう
まく適用できることが認められた。When similar experiments were conducted on recording media using organic dyes other than those in the above examples, it was found that the method of the present invention could be successfully applied.
本発明の方法によれば、記録層に用いる有機色素記録材
料の種類にかかわらず光情報記録媒体の適切な再生条件
を容易に設定できる。According to the method of the present invention, appropriate reproduction conditions for an optical information recording medium can be easily set regardless of the type of organic dye recording material used in the recording layer.
第１図および第２図は本発明の方法による再生条件を設
定するにあた。つての計算結果を示すグラフである。
特許出願人 株式会社 リ コ −
再生光パワー（ｍＷ）
再生光パワーｈＷ）FIGS. 1 and 2 show the setting of regeneration conditions according to the method of the present invention. This is a graph showing the calculation results. Patent applicant Rico Co., Ltd. - Reproduction light power (mW) Reproduction light power hW)
Claims (1)
を再生する際に再生光照射時における記録層の温度が前
記記録層および必要に応じて設けられる他の層の融点お
よび／または昇華点および／または熱分解点のいずれを
も越えないように再生光の走査速度、ノξワーおよびビ
ーム径を設定することを特徴とする、光情報記録媒体の
再生方法。When reproducing information from an optical information recording medium having a recording layer containing an organic dye, the temperature of the recording layer at the time of irradiation with reproduction light is the melting point and/or sublimation point of the recording layer and other layers provided as necessary. 1. A method for reproducing an optical information recording medium, comprising: setting the scanning speed, the nozzle, and the beam diameter of the reproducing light so as not to exceed any of the thermal decomposition points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59107374A JPS60251524A (en) | 1984-05-29 | 1984-05-29 | Reproducing method of optical information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59107374A JPS60251524A (en) | 1984-05-29 | 1984-05-29 | Reproducing method of optical information recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60251524A true JPS60251524A (en) | 1985-12-12 |
Family
ID=14457479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59107374A Pending JPS60251524A (en) | 1984-05-29 | 1984-05-29 | Reproducing method of optical information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60251524A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0614176A1 (en) * | 1993-03-04 | 1994-09-07 | Nikon Corporation | Optical disk reproducing method and apparatus |
-
1984
- 1984-05-29 JP JP59107374A patent/JPS60251524A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0614176A1 (en) * | 1993-03-04 | 1994-09-07 | Nikon Corporation | Optical disk reproducing method and apparatus |
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