JPH0362321A - Optical recording device - Google Patents
Optical recording deviceInfo
- Publication number
- JPH0362321A JPH0362321A JP1197741A JP19774189A JPH0362321A JP H0362321 A JPH0362321 A JP H0362321A JP 1197741 A JP1197741 A JP 1197741A JP 19774189 A JP19774189 A JP 19774189A JP H0362321 A JPH0362321 A JP H0362321A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- recording medium
- thin film
- optical
- rotating
- 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
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- 239000010409 thin film Substances 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 27
- 239000010408 film Substances 0.000 claims description 22
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Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はレーザ光線等の高密度エネルギー束を用いて記
録媒体上に高密度な情報記録を行なう光記録装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an optical recording device that records high-density information on a recording medium using a high-density energy flux such as a laser beam.
従来の技術
光記録媒体が従来の磁気記録媒体に比べてはるかに高密
度に記録が可能であることはよく知られている０例えば
、面記録密度に関して磁気記録媒体と光記録媒体を比較
すると、磁気記録の場合には出力を確保する必要から、
あるいはトラッキング精度の限界の問題からトラックピ
ッチを記録マークピッチに比較して１桁以上大きくしな
ければならないのに対して、光記録では基板上に光ガイ
ド用の溝を予め形成しておく等の方法でトラックピッチ
を光の波長オーダーにまで詰めることができ、これによ
って磁気記録媒体の数倍から１０倍程度の高密度が容易
に達成できる。Conventional technology It is well known that optical recording media can record at a much higher density than conventional magnetic recording media. For example, when comparing magnetic recording media and optical recording media in terms of areal recording density, In the case of magnetic recording, it is necessary to ensure output,
Alternatively, due to the limited tracking accuracy, the track pitch must be increased by an order of magnitude or more compared to the recording mark pitch, whereas in optical recording, grooves for light guides are formed on the substrate in advance, etc. By using this method, the track pitch can be reduced to the order of the wavelength of light, and thereby a high density of several to ten times that of a magnetic recording medium can be easily achieved.
ところが装置としての容量という点で比較すると、面記
録密度で見られるような大きな差はない。However, when compared in terms of device capacity, there is no large difference as seen in areal recording density.
これは、光記録装置の場合には同時にアクセスできる記
録面が１面だけであるのに比べて、磁気記録装置におい
ては記録媒体を何枚も積層したスタック構造とフライン
グヘフドと呼ばれる小形の磁気ヘッドを採用することに
よって同時に多くの面をアクセス可能とすることで装置
としての容量を大きくしているためである。This is because in the case of optical recording devices, only one recording surface can be accessed at the same time, whereas in magnetic recording devices, there is a stack structure in which many recording media are stacked, and a small magnetic field called a flying hef. This is because by employing a head, many surfaces can be accessed simultaneously, increasing the capacity of the device.
光記録媒体そのものの、記録密度を飛躍的に高める手段
は記録メカニズムを従来のヒートモード記録からフォト
ンモード記録へと転換することと言われており、ＰＨＢ
（フォトケミカルホールバーニング）により波長多重
記録、フォトクロミック材料を用いた多層膜記録等が提
案されている。It is said that the means to dramatically increase the recording density of the optical recording medium itself is to change the recording mechanism from conventional heat mode recording to photon mode recording, and PHB
Wavelength multiplexing recording using photochemical hole burning (photochemical hole burning), multilayer recording using photochromic materials, and the like have been proposed.
しかしながら現在のところ、前者は極低温での使用が前
提であること、後者は波長可変レーザまたは波長の異な
る複数のレーザが必要な上に感度が紫外域にあって半導
体レーザの開発が困難視されていること等、装置として
考えた場合に実用的なレベルには遠い状態にある。However, at present, the former requires use at extremely low temperatures, and the latter requires a wavelength tunable laser or multiple lasers with different wavelengths, and its sensitivity is in the ultraviolet region, making it difficult to develop semiconductor lasers. When considered as a device, it is far from a practical level.
発明が解決しようとする課題
従来の記録媒体を用いて記録密度を高めるためのドライ
ブとしての手段は、記録手段の工夫にあって、例えばレ
ーザ光線の波長を現行の８０ｎｍ近傍から６５ｎｍ程度
に短くする、絞りレンズの開口数（ＮＡ）を現行の０．
５程度から例えば０．６〜０．９へと大きくする等があ
る。ただし、前者に関しては短波長半導体レーザの開発
を待たねばならない、また後者については動作距離（ワ
ーキングデイスタンス）、ならびに焦点深度がかなり小
さくなることから記録媒体の構成、記録ヘッドの構成を
含めてフォーカッシングサーボ等の現行の光記録技術を
そのまま適用することはできないという課題がある。Problems to be Solved by the Invention A means for increasing the recording density using conventional recording media as a drive lies in devising the recording means, for example, shortening the wavelength of the laser beam from the current around 80 nm to around 65 nm. , change the numerical aperture (NA) of the aperture lens to the current 0.
For example, it may be increased from about 5 to 0.6 to 0.9. However, for the former, we will have to wait for the development of short wavelength semiconductor lasers, and for the latter, the working distance and depth of focus will be considerably smaller, so we will need to adjust the format, including the configuration of the recording medium and recording head. There is a problem in that current optical recording technology such as cushing servo cannot be applied as is.
そこで光記録の場合にも装置としての容量を大きくする
という観点に立ち、磁気記録装置と同様に記録媒体（例
えば穴あけ記録媒体、相変化記録媒体、光磁気記録媒体
等）の積層構造を採用することが有効と考えられる。但
し、従来の光学的記録ヘッドならびに光記録媒体を用い
て構成することを仮定すると装置を小型化することが困
難になり現実的ではなくなる。つまり従来の光記録装置
では光学的記録ヘッドのサイズが磁気記録ヘッドに比べ
るとはるかに大きいこと、また光ヘッドと記録媒体との
間隔を十分に大きくとることが前提となっており、単に
従来の光記録媒体と光学的記録ヘッドとを積層するだけ
では装置の厚さ（高さ）が極めて大きくなってしまうと
いう課題があった。Therefore, in the case of optical recording as well, from the perspective of increasing the capacity of the device, a stacked structure of recording media (for example, perforated recording media, phase change recording media, magneto-optical recording media, etc.) is adopted in the same way as magnetic recording devices. This is considered to be effective. However, assuming that the apparatus is configured using a conventional optical recording head and optical recording medium, it becomes difficult to miniaturize the apparatus and it becomes impractical. In other words, in conventional optical recording devices, it is assumed that the size of the optical recording head is much larger than that of the magnetic recording head, and that the distance between the optical head and the recording medium is sufficiently large. There is a problem in that the thickness (height) of the device becomes extremely large simply by stacking the optical recording medium and the optical recording head.
すなわち従来の技術を単純に集めるだけでは磁気ディス
ク装置におけるような積層による大容量化は困難であっ
た。In other words, it has been difficult to increase the capacity by stacking layers as in magnetic disk devices by simply collecting conventional techniques.
本発明は上述したように現在の光記録媒体が直面してい
る容量アップに伴う種々の限界を克服することを目的と
する。すなわち、本発明の目的は従来よりも開口数の大
きい光学系による記録を可能とし、かつ小形の装置で記
録媒体を積層した構造を可能とすることで光記録でなけ
れば達成され得ない超大容量記録装置を実現しようとい
うものである。As mentioned above, the present invention aims to overcome the various limitations faced by current optical recording media due to increased capacity. In other words, the purpose of the present invention is to enable recording using an optical system with a larger numerical aperture than conventional ones, and to enable a structure in which recording media are stacked in a small device, thereby achieving ultra-high capacity that could only be achieved with optical recording. The idea is to realize a recording device.
課題を解決するための手段
本発明では上記課題を解決し本発明の目的とする超高密
度光記録装置を実現するために単板基板の両面にレーザ
光線等の高密度エネルギー束の照射によってその光学的
特性を変化する記録薄膜と必要に応じて前記記録膜表面
に記録膜を保護する目的で記録膜よりも硬度が高く、か
つ透明で厚さが高々数百ミクロンメートル程度の保護層
あるいは耐摩耗層を備えた記録媒体と、前記記録媒体を
回転あるいは移動させる手段と、前記記録媒体の各面に
近接して配置され前記記録媒体の回転、移動に伴い環境
ガスの抵抗により所定の高さ浮上する浮上型光学的記録
ヘッドとを適用する。光学系の可動部は反射ミラーと対
物レンズと浮上のためのスライダーのみで構成するいわ
ゆる分離光学ヘッドとし軽量化を図る。Means for Solving the Problems In the present invention, in order to solve the above-mentioned problems and realize an ultra-high density optical recording device as an object of the present invention, both sides of a single substrate are irradiated with a high-density energy flux such as a laser beam. A recording thin film that changes optical properties and, if necessary, a protective layer or a protective layer that is harder than the recording film and transparent and has a thickness of several hundred micrometers at most, for the purpose of protecting the recording film on the surface of the recording film. a recording medium having an abrasion layer; a means for rotating or moving the recording medium; and a means for rotating or moving the recording medium; and a means for rotating or moving the recording medium; A floating floating optical recording head is applied. The movable part of the optical system is a so-called separated optical head consisting only of a reflecting mirror, an objective lens, and a slider for floating to reduce weight.
また本発明では同じく上記課題を達成するために上記記
録媒体と、移動または回転手段と、光学的記録ヘッドと
を外気の変化の影響を受けない一つの密閉構造の箱の中
に閉じ込めた構成を適用する。Furthermore, in order to achieve the above object, the present invention has a structure in which the recording medium, the moving or rotating means, and the optical recording head are enclosed in a single sealed box that is not affected by changes in the outside air. Apply.
また本発明では更に超高密度な記録装置を実現するため
に、前記記録媒体を近接して複数枚積層したものと、そ
の記録体を移動または回転する手段と、上記記録体の各
記録面に近接して配置した光学的記録ヘッドとを外気の
変化の影響を受けにくい一つの密閉構造の箱の中に閉じ
込めた構成を適用する。Furthermore, in order to realize an ultra-high density recording device, the present invention includes a structure in which a plurality of the recording media are stacked closely together, a means for moving or rotating the recording medium, and a means for moving or rotating the recording medium, and a means for moving or rotating the recording medium, and a A configuration is applied in which the optical recording head and the optical recording head arranged close to each other are enclosed in a single box with a closed structure that is not easily affected by changes in the outside air.
また本発明では構成を容易にするために、記録層として
特に相変化記録材料薄膜、とりわけ単一レーザビームに
よるオーバライトの可能な相変化記録薄膜を有する記録
媒体を適用する。Further, in the present invention, in order to simplify the structure, a recording medium having a thin film of phase change recording material, particularly a thin film of phase change recording material that can be overwritten by a single laser beam, is used as the recording layer.
また本発明では記録膜面への光照射は各面とも記録膜側
から行なうために記録膜の表面には硬度が記録膜よりも
高く光学的に透明な高々数百ξクロンメートル厚、望ま
しくは１（１０ミクロンメートル以下の厚さの耐摩耗層
を形成した構成をとる。Furthermore, in the present invention, since the light irradiation to the recording film surface is performed from the recording film side on each surface, the surface of the recording film has a hardness higher than that of the recording film and is optically transparent. 1 (takes a configuration in which a wear-resistant layer with a thickness of 10 micrometers or less is formed).
記録膜の表面に光学的最適化のために別の材料薄ｗａ１
１を設ける構造を採用する場合にはその薄膜に比べても
硬度が高い耐摩耗層を形成する。Another material thin wa1 for optical optimization on the surface of the recording film
1, a wear-resistant layer with higher hardness than that thin film is formed.
また本発明ではヘッドの浮上量を一定にするための一方
法として回転、移動の線速度が記録媒体上のどの位置で
も一定となる方式を適用する。Further, in the present invention, as a method for making the flying height of the head constant, a method is applied in which the linear velocity of rotation and movement is constant at any position on the recording medium.
また本発明では光学的記録ヘッドの調整を容易にする目
的でスライダーと対物レンズ、偏向ミラー（プリズム）
を一体成形する。In addition, in the present invention, a slider, an objective lens, and a deflection mirror (prism) are used to facilitate adjustment of the optical recording head.
are integrally molded.
作用
単板構造を採用し、浮上型の光学的記録ヘッドを用いて
記録膜側からの光照射を行なうことで装置全体を小型化
することが可能になる。この際、ヘッドと記録面との間
隔を従来に比べてはるかに小さくできることから高い開
口数の光学系を適用することができ記録密度の向上が図
れる。同時に、両面が同時にアクセス可能な記録媒体で
あるため記録媒体を効率よく積層することが可能であり
、装置としてのｉ躍的な容量アップが可能となる。By adopting a working single plate structure and using a floating optical recording head to irradiate light from the recording film side, it is possible to downsize the entire apparatus. At this time, since the distance between the head and the recording surface can be made much smaller than in the past, an optical system with a high numerical aperture can be applied, and the recording density can be improved. At the same time, since both sides of the recording medium can be accessed simultaneously, it is possible to efficiently stack the recording media, and the capacity of the device can be dramatically increased.
さらに、機密ボックスに閉じ込めることでゴミ。Additionally, trash by locking it up in a confidential box.
埃の影響を排除すると共に、記録媒体の保護層を薄＜シ
ても外気の影響を受けにくくすることが可能となる。In addition to eliminating the influence of dust, it is possible to make the protective layer of the recording medium less susceptible to the influence of outside air even if it is made thin.
実施例
以下、図面を参照しながら本発明の光記録装置の一実施
例を説明する。Embodiment Hereinafter, one embodiment of the optical recording apparatus of the present invention will be described with reference to the drawings.
第１図は本発明の光記録装置の構成図である。FIG. 1 is a block diagram of an optical recording apparatus of the present invention.
記録媒体部４は回転軸６を介してモーター５に固定され
、モーターによって高速に、例えば１８（１０−５４０
Ｏｒｐｍ程度の回転数で回転駆動される。The recording medium unit 4 is fixed to a motor 5 via a rotating shaft 6, and is rotated at high speed by the motor, for example, 18 (10-540
It is driven to rotate at a rotational speed of about 100 psi.
記録媒体部の両側の表面にはスライダー７と対物レンズ
８とミラー９あるいは偏向プリズムからなる小型の光学
的記録ヘッド１０が配備され媒体部の回転に伴って浮上
するしくみになっている。前記ミラー部には媒体部の外
周部よりもさらに外側に設置されたレーザー（図面省略
）から放出されたレーザー光１１が供給され、対物レン
ズによって記録層２へと絞り込まれ記録再生書き換え等
を行なう。本発明の第１のポイントは記録媒体部の構造
ならびに記録層の種類の選定にある。記録媒体部・は光
学的に平滑な基板１の両面に記録層２が形成されその上
に保護層３が設置された構造となっている。基材は表面
が光学的に平滑なこと、反り、歪等ができるだけ少ない
ことが大切であって、例えば反りの大きさは最大５０亀
クロンメートル以下であることが望ましい、材質として
はガラス板１ｗ４板、アル【ニウム板等の金属板、ＰＭ
ＭＡ板、ポリカーボネイト板、塩化ビニール板等の樹脂
板等を用いることができる。ただし本発明は単板で構成
する方が効果的であり、強度や剛性が大きいという理由
からガラス板、金属板が好ましい。A small optical recording head 10 consisting of a slider 7, an objective lens 8, a mirror 9, or a deflection prism is provided on both surfaces of the recording medium section, and is configured to float as the medium section rotates. Laser light 11 emitted from a laser (not shown in the drawing) installed further outside the outer circumference of the medium section is supplied to the mirror section, and is focused by an objective lens onto the recording layer 2 for recording, rewriting, etc. . The first point of the present invention lies in the structure of the recording medium section and the selection of the type of recording layer. The recording medium section has a structure in which a recording layer 2 is formed on both sides of an optically smooth substrate 1, and a protective layer 3 is placed thereon. It is important for the base material to have an optically smooth surface and to have as little warp, distortion, etc. as possible. For example, it is desirable that the warp size is at most 50 square meters or less. The material is glass plate 1w4. plate, metal plate such as aluminum plate, PM
A resin board such as an MA board, a polycarbonate board, or a vinyl chloride board can be used. However, in the present invention, it is more effective to use a single plate, and a glass plate or a metal plate is preferable because of their high strength and rigidity.
基板の表面には記録再生時に記録光、再生光のトラッキ
ングを行なう目的でスパイラル状、同心円状の溝、信号
ピット列をあらかじめ設けておく。Spiral or concentric grooves and signal pit rows are previously provided on the surface of the substrate for the purpose of tracking recording light and reproduction light during recording and reproduction.
図面には代表的に溝１２を形成した場合を記載している
。溝が基板表面に直接形成可能という点からは金属板に
比較してガラス板が優れている。金属盤の場合には２Ｐ
法によって溝を形成することができる。The drawings typically show a case where grooves 12 are formed. Glass plates are superior to metal plates in that grooves can be formed directly on the substrate surface. 2P for metal discs
The grooves can be formed by a method.
単板両面構造にするのは２枚を張り合わせるよりも全体
の厚さを薄くすることができるという理由からであるが
、この構造を採用する場合には記録薄膜の種類は特に相
変化材料が有効である。まずライトワンスタイプの記録
媒体を考えると、例えば現在市販されている追記型記録
装置の記録媒体には、レーザ光線の照射によって照射部
の温度を局部的に昇温させ、照射部の物質を蒸発あるい
は移動させて穴を形成する、照射部の物質の状態をアモ
ルファス状態から結晶状態に変化させて光学的特性を変
化させる等のメカニズムに基づくもの等があるが、前者
のように記録に際して物質の移動を伴うものは本発明に
は遺さない、なぜなら、後述するように、本発明では記
録媒体表面と記録ヘッドとを極めて近接した状態で設定
するためである。即ち、物質の移動を伴う記録媒体では
原理的に記録層に密着した保護層を設置することができ
ないため、記録ヘッドの衝突による記録膜の損傷、デー
タの消失等を避けることが難しい、また、衝突がないと
仮定しても蒸発物が光学系を汚す等の影響は避けがたい
、従って、本発明に適用される記録薄膜は原理的に物質
の形状変化、大きな物質移動を伴わないもの、密着した
保護層を着けることが可能なものが要求され、これを満
足するものとして相変化材料薄膜が特に適してい。The reason for using a double-sided single-plate structure is that the overall thickness can be made thinner than by laminating two sheets together. However, when adopting this structure, the type of recording thin film, especially phase change material, is required. It is valid. First, considering write-once type recording media, for example, in the recording media of write-once type recording devices currently on the market, the temperature of the irradiated area is locally increased by irradiation with a laser beam, and the material in the irradiated area is evaporated. Alternatively, there are methods based on mechanisms such as moving the material to form a hole or changing the state of the material in the irradiated area from an amorphous state to a crystalline state to change the optical properties. The present invention does not involve movement, because, as described later, in the present invention, the recording medium surface and the recording head are set extremely close to each other. That is, in a recording medium that involves material movement, it is impossible in principle to provide a protective layer that is in close contact with the recording layer, so it is difficult to avoid damage to the recording film and loss of data due to collisions with the recording head. Even assuming that there is no collision, it is difficult to avoid the effects of evaporated matter contaminating the optical system, etc. Therefore, the recording thin film applied to the present invention should, in principle, be one that does not involve changes in the shape of substances or large transfers of substances. There is a need for something that can be applied with an adherent protective layer, and phase change material thin films are particularly suitable for meeting this requirement.
次に書換型の光記録媒体を考えると、密着構造がとれる
記録媒体として相変化材料以外にも光磁気記録材料が考
えられる。しかしながら、光磁気記録の場合には記録再
生のために光学記録ヘッドばかりでなくさらに大きな磁
界を発生するための補助磁界発生コイルが必要であり装
置を小型化するという本発明の目的を満足しない。また
、データの書換を考えると相変化媒体の場合には光ヘッ
ドだけでオーバライトすることが可能であるのに対して
光磁気記録媒体の場合には光ヘッドに媒体をはさんで対
向する磁気ヘッドが必要となり媒体の両面を同時にアク
セスすることが困難である。Next, when considering rewritable optical recording media, magneto-optical recording materials can be considered in addition to phase change materials as recording media that can have a close contact structure. However, in the case of magneto-optical recording, not only an optical recording head but also an auxiliary magnetic field generating coil for generating a larger magnetic field is required for recording and reproduction, which does not satisfy the purpose of the present invention of miniaturizing the apparatus. In addition, when considering data rewriting, in the case of phase change media, it is possible to overwrite with just an optical head, whereas in the case of magneto-optical recording media, it is possible to overwrite data with the optical head sandwiching the medium between them. A head is required, making it difficult to access both sides of the medium at the same time.
即ち、書換型の装置を想定した場合においても相変化媒
体を採用する場合おいて特に本発明を有効たらしめるこ
とかできる。That is, even when a rewritable device is assumed, the present invention can be particularly effective when a phase change medium is employed.
保護層を設ける理由は一つには光学的な干渉効果を利用
して反射率等の調整をするためであり、一つにはヘッド
が衝突した際に記録膜を損傷から守るためである。従っ
て、保護層には使用光源の波長にたいして光学的に透明
であること、摩耗しにくいこと、例えば硬度が記録膜や
スライダー材料に比べて高いことといった特性が必要で
ある。One reason for providing the protective layer is to use optical interference effects to adjust reflectance, and the other is to protect the recording film from damage when a head collides with it. Therefore, the protective layer must have properties such as being optically transparent to the wavelength of the light source used, being resistant to abrasion, and having, for example, higher hardness than the recording film or slider material.
当然、従来の光記録媒体に適用されている酸化物。Naturally, oxides are applied to conventional optical recording media.
窒化物、硫化物、セレン化物、及びこれらの混合物薄膜
は効果があるが、ＤＬＣ（ダイアモンドライクカーボン
）膜、ＣＢＮ（キュービック窒化物ボロン）膜等硬度の
高い薄膜は特に有効である。Thin films of nitrides, sulfides, selenides, and mixtures thereof are effective, but thin films with high hardness such as DLC (diamond-like carbon) films and CBN (cubic boron nitride) films are particularly effective.
保ｌｉＨの厚みは保護層の材質（屈折率）と、対物レン
ズの大きさ（有効径）とＮＡによって上限がある。レン
ズの有効径を１ミリメートル程度、ＮＡを０．５程度と
するときレンズ設計上レンズ系のワーキングデイスタン
スが高々数百ミクロン程度が限度であることを考慮する
と保護層の厚さもまた高々数百ξクロンメートルに抑え
なければならない、ＮＡを大きくするためにはさらに薄
くすることが必要であって望ましくは１（１０ミクロン
メートル以下にすること、理想的には１０ミクロンメー
トル以下にすることが必要である。The thickness of the protective layer has an upper limit depending on the material (refractive index) of the protective layer and the size (effective diameter) and NA of the objective lens. When the effective diameter of the lens is about 1 mm and the NA is about 0.5, considering that the working distance of the lens system is limited to about several hundred microns at most due to lens design, the thickness of the protective layer is also about several hundred microns at most. In order to increase the NA, it is necessary to make it even thinner, preferably 1 (below 10 microns, ideally less than 10 microns). It is.
本発明の第２のポイントは記録媒体の各面に浮上型の光
学的記録へラド１０を配置する点にある。The second point of the present invention is that floating optical recording pads 10 are arranged on each surface of the recording medium.
前記光学的記録ヘッドはスライダー７と対物レンズ８と
ミラー９とから構成され前記記録媒体が高速回転するこ
とによって記録媒体の表面上に数ξクロンメートルから
数十ミクロンメートルの空気層を介して浮上することに
なる。The optical recording head is composed of a slider 7, an objective lens 8, and a mirror 9, and as the recording medium rotates at high speed, it floats above the surface of the recording medium through an air layer of several ξ meters to several tens of micrometers. I will do it.
半導体レーザ等のレーザ光源を発したレーザ光１１はコ
リメーターレンズを通じて平行ビームになりミラーある
いはプリズムを介して対物レンズに至り、記録面上に絞
りこまれ記録が行なわれる。Laser light 11 emitted from a laser light source such as a semiconductor laser passes through a collimator lens, becomes a parallel beam, reaches an objective lens via a mirror or prism, and is focused onto a recording surface for recording.
この場合、スライダーに搭載されるレーザ光１１を絞り
込むための対物レンズは記録媒体の表面までの間隔が最
小数ξクロン程度にすることができるので絞りレンズの
口径を限界まで小さくすることができる、同様の理由で
従来の０．５程度から０．６〜０．９程度ＮＡの大きい
対物レンズを用いることが可能になり記録密度の向上を
図ることができる。In this case, the distance between the objective lens mounted on the slider for narrowing down the laser beam 11 to the surface of the recording medium can be set to a minimum of several ξ meters, so the aperture of the aperture lens can be made as small as possible. For the same reason, it becomes possible to use an objective lens with a larger NA of about 0.6 to 0.9 than the conventional one of about 0.5, and it is possible to improve the recording density.
スライダーの材質はある程度の硬度があって軽いことと
いう条件から磁気記録におけるフライングヘッドに用い
られているもの例えばＭ ｎ −Ｚ ｎフェライト等を
用いることができるが第４図に示したようにレンズと同
質の材料で形成する、つまり対物レンズと逅う−とスラ
イダーとを一体のものとして底形することでスライダー
７に対する対物レンズ８の取り付は精度をどう確保する
かというような問題をクリアーすることができる。材質
はガラスもしくはプラスチックを用いることになるが、
プラスチックのように比較的摩耗しやすいものを使う場
合にはスライダー部の表面に上記ＤＬＣ膜等の耐摩耗層
１６を形成することができる（第４図参照〉。As the material of the slider, materials used for flying heads in magnetic recording, such as Mn-Zn ferrite, can be used as the material must have a certain degree of hardness and be light. By forming the objective lens and the slider with the same material, that is, by making the bottom shape of the slider and the objective lens as one body, the problem of how to ensure precision in mounting the objective lens 8 to the slider 7 is solved. be able to. The material will be glass or plastic,
When using a material that is relatively easily abraded, such as plastic, a wear-resistant layer 16 such as the above-mentioned DLC film can be formed on the surface of the slider portion (see FIG. 4).
光記録ヘッドの浮上量（媒体表面とヘッドとの間隔）は
ヘッドと媒体との間の相対的な速度で決定される。従っ
である回転の速度（ｖＡ速度という見方で）を与えた場
合にはレンズと媒体との間隔は一義的に決定されフォー
カフシングの必要なく記録、消去、再生を行わすことも
可能となる。線速度を一定に保つ手段としてはいわゆる
ＣＬＶ方式が有力な方法である。第１図においては光記
録装置として当然必要なトラッキング機構、記録媒体の
輸送機構等を省略しているがこれらの機構が必要である
ことはいうまでもない。The flying height (distance between the medium surface and the head) of the optical recording head is determined by the relative speed between the head and the medium. Therefore, when a certain rotational speed (in terms of vA speed) is given, the distance between the lens and the medium is uniquely determined, and recording, erasing, and reproducing can be performed without the need for focusing. . The so-called CLV method is an effective method for keeping the linear velocity constant. Although FIG. 1 omits the tracking mechanism, recording medium transport mechanism, etc. that are naturally necessary for an optical recording apparatus, it goes without saying that these mechanisms are necessary.
本発明の第３のポイントは記録媒体と光学的記録ヘッド
を積層した系をコンパクトに構成できる点であって、こ
れにより装置の容量が飛躍的に大きくなる。第２図に積
層構造を採用して構成した本発明の記録装置の概略図を
示す。図中、１４は４枚の記録媒体で構成したスタック
構造の記録体の構成例である。記録媒体１枚の厚さは０
．５〜２ミリメートル、各媒体間の′間隔は３〜５ミリ
メートル程度に選ぶことができるのでいわゆるハーフハ
イド（４２ミリメートル）と呼ばれる高さの装置の中に
４枚〜１０枚程度、フルハイド（８４ミリメートル）の
場合には８枚〜２０枚程度の記録媒体を有するスタック
構造の記録体を備えることができ、装置としての容量が
１０倍以上に一気に増大する。記録層の各面にそれぞれ
独立した前記光学的記録ヘッドを配置することで、各面
を同時にアクセスすることが可能である。The third point of the present invention is that the system in which the recording medium and the optical recording head are stacked can be constructed compactly, and this dramatically increases the capacity of the apparatus. FIG. 2 shows a schematic diagram of a recording apparatus of the present invention constructed using a laminated structure. In the figure, reference numeral 14 is an example of the structure of a recording medium having a stacked structure composed of four recording media. The thickness of one recording medium is 0
．． 5 to 2 mm, and the distance between each medium can be selected to be about 3 to 5 mm, so 4 to 10 sheets and full hide (84 mm) can be placed in a device with a height of so-called half hide (42 mm). In the case of ), it is possible to provide a stacked recording medium having about 8 to 20 recording media, and the capacity of the device increases at once by more than 10 times. By arranging independent optical recording heads on each side of the recording layer, each side can be accessed simultaneously.
記録体は周囲の環境による影響、例えば、ゴミ。The recording medium is affected by the surrounding environment, such as dust.
埃、風、湿気等の影響から隔離するために全体を気密ボ
ックスの中に格納して使用することができる。気密ボッ
クスは外気と完全に遮断し、窒素。The entire device can be stored in an airtight box to isolate it from the effects of dust, wind, moisture, etc. The airtight box is completely isolated from outside air and nitrogen.
アルゴン等の希ガ、スを充填することもできるし、フィ
ルターを通じて清浄な空気を循環させることもできる。It can be filled with rare gases such as argon, or clean air can be circulated through a filter.
特に前者の構造の場合には記録媒体の温度劣化、酸化等
の心配がないので保護層を薄くすることができる等の相
乗効果を生じ、媒体設計の自由度が広がる。In particular, in the case of the former structure, since there is no fear of temperature deterioration or oxidation of the recording medium, synergistic effects such as the ability to make the protective layer thinner are produced, and the degree of freedom in medium design is increased.
第３図（Ａ）〜（Ｐ）に本発明の記録装置に用いる記録
媒体の構造を示す、各図において同じ模様の部分は等し
い構成要素を示している。第３図（Ａ）は基板１の両面
に記録層２を設けただけの最も簡単な構造である。FIGS. 3(A) to 3(P) show the structure of a recording medium used in the recording apparatus of the present invention. In each figure, parts with the same pattern indicate the same constituent elements. FIG. 3(A) shows the simplest structure in which the recording layer 2 is provided on both sides of the substrate 1.
記録層を構成する記録材料はレーザー光線の照射条件に
よって例えばアモルファス相と結晶相の間、結晶相と別
の結晶相との間で相変化を生じる薄膜であってＧｅ−Ｔ
ｅ、 Ｇｅ−Ｔｅ−５ｎ。The recording material constituting the recording layer is a thin film that undergoes a phase change, for example, between an amorphous phase and a crystalline phase, or between a crystalline phase and another crystalline phase, depending on the laser beam irradiation conditions.
e, Ge-Te-5n.
Ｇｅ−Ｔｅ−３ｂ、Ｇｅ−Ｔｅ−Ｂ１．ＧｅＴｅ−５ｎ
−Ａｕ＝、Ｇｅ−３ｅ−Ｔｅ、５ｂ−３ｅ、５ｂ−３ｅ
−Ｔｅ、Ｉｎ−Ｔｅ、５ｂＴｅ、Ｉｎ−３ｅ、Ｉｎ−３
ｂ−Ｔｅ、Ｉｎ５ｂ−Ｓｅ、Ｉｎ−３ｅ−ＴＩＥ、Ｉｎ
−３ｅＴ４！−Ｃｏ、Ｇａ−Ｔｅ−３ｅ、Ｔｅ−０−Ｇ
ｅ−３ｎ、Ｔｅ−０−Ｃｕｅ−３ｎ−Ａｕ、 Ｉ ｎ−
Ｔｅ −Ａｕ等のテルル、セレンをベースとする薄膜、
Ｇａ−３ｂ、Ｉｎ−３ｂ、Ａｕ−３ｂ、Ｇｅ−３ｂ、Ｃ
ｕ−３ｂ、Ｂ１−３ｂ、Ｚｎ−３ｂ。Ge-Te-3b, Ge-Te-B1. GeTe-5n
-Au=, Ge-3e-Te, 5b-3e, 5b-3e
-Te, In-Te, 5bTe, In-3e, In-3
b-Te, In5b-Se, In-3e-TIE, In
-3eT4! -Co, Ga-Te-3e, Te-0-G
e-3n, Te-0-Cue-3n-Au, I n-
Thin films based on tellurium and selenium such as Te-Au,
Ga-3b, In-3b, Au-3b, Ge-3b, C
u-3b, B1-3b, Zn-3b.
Ａｇ−３ｂ等のアンチモンをベースとする薄膜、Ａｇ−
Ｚｎ等金属−金属間でのバンド構造の変化による反射率
の差を利用する薄膜等が用いられる。Antimony-based thin films such as Ag-3b, Ag-
A thin film or the like that utilizes a difference in reflectance due to a change in band structure between metals such as Zn is used.
とりわけ、単一レーザビームによるオーバライトの可能
なものとして、ＧｅＴｅ、Ｇｅ５ｂＴｅＩｎＳｂＴｅ、
Ｉｎ５ｅＴｆＩＣｏ、５ｂＳｅ。Among others, GeTe, Ge5bTeInSbTe, GeTe, Ge5bTeInSbTe,
In5eTfICo, 5bSe.
ＣａＳｂの基糸、なかでもＧｅ５ｂＴｅ系が効果的であ
る。CaSb base threads, especially Ge5bTe series, are effective.
第３図（Ｂ）は基板と各記録層との間に記録層よりも融
点の高い物質層、例えば誘電体層１２を設けた構造、第
３図（Ｃ）は記録層の両側に同様の層を設けた構造、第
３図（Ｄ）は記録層の表面だけに誘電体層を設けた構造
である。記録膜の上部に設ける場合には透明であること
が要求される。誘電体層はその膜厚を適当に選ぶことに
よって記録前後における光学的変化量１反射率、吸収率
等を最適なものとする働きをするものであって５ｉｎ２
ＴｉＯ２，Ａｆ２０．、 ＺｒＯ２，ＧｅＯ２０等の酸
化物、Ａｊ！Ｎ、ＳｉＮ、ＢＮ等の窒化物、ＺｎＳ、Ｚ
ｎ５ｅ等のカルコゲン化物、前述のＤＬＣ膜等を用いる
ことができる。記録膜の感度が不足するような場合には
記録層と基板との間の層には熱伝導率の低い材料を用い
、基板への熱拡散を押さえる。Figure 3 (B) shows a structure in which a layer of material with a higher melting point than the recording layer, for example a dielectric layer 12, is provided between the substrate and each recording layer, and Figure 3 (C) shows a structure in which a similar material layer is provided on both sides of the recording layer. FIG. 3(D) shows a structure in which a dielectric layer is provided only on the surface of the recording layer. When provided above the recording film, it is required to be transparent. The dielectric layer has the function of optimizing the amount of optical change, reflectance, absorption, etc. before and after recording by appropriately selecting the film thickness.
TiO2, Af20. , oxides such as ZrO2, GeO20, Aj! Nitride such as N, SiN, BN, ZnS, Z
A chalcogenide such as n5e, the above-mentioned DLC film, etc. can be used. In cases where the sensitivity of the recording film is insufficient, a material with low thermal conductivity is used for the layer between the recording layer and the substrate to suppress heat diffusion to the substrate.
第３図（１）は記録層と基板との間に反射層１３を設け
た構造、第３図（Ｌ）は第３図（１）の構造にお・いて
表面に誘電体層を形成した構造例を示す。Figure 3 (1) shows a structure in which a reflective layer 13 is provided between the recording layer and the substrate, and Figure 3 (L) shows the structure in Figure 3 (1) with a dielectric layer formed on the surface. A structural example is shown.
反射層は記録層における光吸収効率を高める働きをＡｊ
！、 Ａｕ、 Ｐｄ、 Ｃｕ、 Ｔｉ、 Ｎｉ、 Ｃｒ
。The reflective layer has the function of increasing light absorption efficiency in the recording layer.
! , Au, Pd, Cu, Ti, Ni, Cr
.
Ｇｅ、Ｓｉ、Ｆｅ、Ｓｂ、Ｓｎ、Ｔａ、Ｗ等の金属を単
体またはこれらの間の合金薄膜として用いることができ
る。Metals such as Ge, Si, Fe, Sb, Sn, Ta, and W can be used alone or as an alloy thin film between them.
第３図（Ｊ）は反射層と記録層との間に誘電体層を挟ん
だ構造を、第３図（Ｋ）は第３図（Ｊ）の構造において
記録層の表面にさらに誘電体層を形成した構造を示す。Figure 3 (J) shows a structure in which a dielectric layer is sandwiched between the reflective layer and the recording layer, and Figure 3 (K) shows the structure in Figure 3 (J) with an additional dielectric layer on the surface of the recording layer. This shows the structure that formed the .
記録層と反射層の間に誘電体層を設けることで記録層と
、反射層との距離を変えることが可能になり光学的特性
とともに熱的特性をも最適化することが可能になる。By providing a dielectric layer between the recording layer and the reflective layer, it is possible to change the distance between the recording layer and the reflective layer, making it possible to optimize not only the optical properties but also the thermal properties.
第３図（Ｅ）、 （Ｆ）、 ＣＧ）、 （Ｈ）、 （Ｍ
）、 （Ｎ）。Figure 3 (E), (F), CG), (H), (M
), (N).
（０）、（Ｐ）はそれぞれ第３図（Ａ）、（Ｂ）、（Ｃ
）。(0) and (P) are respectively shown in Figure 3 (A), (B), and (C).
).
（Ｄ）、 （Ｊ）、 （Ｋ）、 （Ｌ）の構造に対して
前記保護層を設けた構戊例を示している。Examples of structures in which the protective layer is provided for the structures of (D), (J), (K), and (L) are shown.
以上、本実施例によって、ＮＡの大きい対物レンズが搭
載可能な浮上型の光学的記録ヘッドと各種単板両面構造
の記録媒体を基本とする光記録装置によって従来の光デ
イスク装置に比較して同じ装置サイズで１桁以上大きい
容量を実現できることが示された。As described above, according to this embodiment, an optical recording device based on a floating optical recording head that can mount an objective lens with a large NA and various types of single-plate double-sided structure recording media has the same performance as that of a conventional optical disk device. It has been shown that it is possible to achieve a capacity that is more than an order of magnitude larger than the device size.
発明の効果
本発明の光記録装置によって現在の光記録媒体が直面し
ている容量アップに伴ういくつかの限界が克服された。Effects of the Invention The optical recording device of the present invention overcomes several limitations associated with increased capacity that current optical recording media face.
すなわち、本発明は従来よりも開口数の大きい光学系の
使用を容易にし、かつ記録媒体を積層した構造を小型装
置において可能とすることで光記録でなければ達成され
得ない超大容量記録装置を実現することができた。That is, the present invention facilitates the use of an optical system with a larger numerical aperture than conventional ones, and enables a structure in which recording media are stacked in a compact device, thereby making it possible to create an ultra-high capacity recording device that could not be achieved without optical recording. I was able to make it happen.
第１図は本発明の光記録装置の一実施例の基本構成を示
す構成国、第２図は本発明の光記録装置の別の実施例を
説明する構成図、第３図は本発明を構成する記録媒体の
構造を示す断面図、第４図は本発明を構成する光記録ヘ
ッド部のスライダーと対物レンズを一体化した構成の一
実施例を示す図である。
１・・・・・・基板、２・・・・・・記録層、３・・・
・・・保護層、４・・・・・・記録媒体部、５・・・・
・・モーター、６・・・・・・回転軸、７・・・・・・
スライダー、８・・・・・・対物レンズ、９・・・・・
・ミラー、１０・・・・・・光学的記録ヘッド、１１・
・・・・・レーザー光、１２・・・・・・溝。FIG. 1 shows the basic configuration of an embodiment of the optical recording device of the present invention, FIG. 2 is a configuration diagram illustrating another embodiment of the optical recording device of the present invention, and FIG. FIG. 4 is a sectional view showing the structure of the recording medium constituting the present invention. FIG. 4 is a diagram showing an embodiment of the structure in which the slider and objective lens of the optical recording head constituting the present invention are integrated. 1...Substrate, 2...Recording layer, 3...
...Protective layer, 4...Recording medium section, 5...
... Motor, 6 ... Rotating shaft, 7 ...
Slider, 8...Objective lens, 9...
- Mirror, 10... Optical recording head, 11.
... Laser light, 12 ... Groove.
Claims (14)
間を可逆的または非可逆的に変化する記録薄膜を単板基
板の両面に備えた記録媒体、もしくは前記記録薄膜表面
にさらに必要に応じて光学的に透明で高々数百ミクロン
メートルの厚さの保護層を形成して構成した記録媒体と
、前記記録媒体を回転または移動させるための手段と、
前記記録媒体の両側の面にそれぞれ近接して配置され、
前記記録媒体の回転、移動に伴い周囲の環境ガスの抵抗
によって所定の距離を保ちつつ浮上し前記記録媒体の各
記録薄膜上に情報に応じた記録を行なう光学的記録ヘッ
ドとを備えた光記録装置。(1) A recording medium comprising a recording thin film on both sides of a single substrate that changes reversibly or irreversibly between a plurality of states that can be detected by irradiation with a laser beam, or a recording thin film further provided on the surface of the recording thin film as necessary. a recording medium formed with an optically transparent protective layer having a thickness of at most several hundred micrometers; and means for rotating or moving the recording medium;
disposed close to both sides of the recording medium,
An optical recording head comprising an optical recording head that flies while maintaining a predetermined distance due to the resistance of surrounding environmental gas as the recording medium rotates and moves, and records information on each recording thin film of the recording medium according to the information. Device.
間を可逆的または非可逆的に変化する記録薄膜を単板基
板の両面に備えた記録媒体、もしくは前記記録薄膜表面
にさらに必要に応じて光学的に透明で高々数百ミクロン
メートルの厚さの保護層を形成して構成した記録媒体と
、前記記録媒体を回転または移動させるための手段と、
前記記録媒体の両側の面にそれぞれ近接して配置され、
前記記録媒体の回転、移動に伴い周囲の環境ガスの抵抗
によって所定の距離を保ちつつ浮上し前記記録媒体の各
記録薄膜上に情報に応じた記録を行なう開口数０．６以
上の対物レンズを搭載した光学的記録ヘッドとを備えた
光記録装置。(2) A recording medium comprising a recording thin film on both sides of a single substrate that changes reversibly or irreversibly between a plurality of states that can be detected by laser beam irradiation, or a recording thin film further provided on the surface of the recording thin film as necessary. a recording medium formed with an optically transparent protective layer having a thickness of at most several hundred micrometers; and means for rotating or moving the recording medium;
disposed close to both sides of the recording medium,
An objective lens having a numerical aperture of 0.6 or more that floats while maintaining a predetermined distance due to the resistance of surrounding environmental gas as the recording medium rotates and moves, and records information in accordance with each recording thin film of the recording medium. An optical recording device equipped with an optical recording head.
間を可逆的または非可逆的に変化する記録薄膜を単板基
板の両面に備えた記録媒体もしくは前記記録薄膜表面に
さらに必要に応じて光学的に透明で高々数百ミクロンメ
ートルの厚さの保護層を形成して構成した記録媒体と、
前記記録媒体を回転または移動させるための手段と、前
記記録媒体の両側の面にそれぞれ近接して配置され、前
記記録媒体の回転、移動に伴い周囲の環境ガスの抵抗に
よって所定の距離を保ちつつ浮上し前記記録媒体の各記
録薄膜上に情報に応じた記録を行なう光学的記録ヘッド
とを、外部環境の変化から隔離するための気密ボックス
中に備えた光記録装置。(3) A recording medium comprising a recording thin film on both sides of a single substrate that changes reversibly or irreversibly between a plurality of states that can be detected by irradiation with a laser beam, or a recording thin film provided with an optical recording film on the surface of the recording thin film as necessary. A recording medium formed by forming a protective layer that is transparent and has a thickness of at most several hundred micrometers;
a means for rotating or moving the recording medium; and means disposed close to both sides of the recording medium, while maintaining a predetermined distance by resistance of surrounding environmental gas as the recording medium rotates or moves. An optical recording device comprising an optical recording head that floats and records information on each recording thin film of the recording medium in an airtight box for isolating it from changes in the external environment.
間を可逆的または非可逆的に変化する記録薄膜を単板基
板の両面に備えた記録媒体もしくは前記記録薄膜表面に
さらに必要に応じて光学的に透明で高々数百ミクロンメ
ートルの厚さの保護層を形成して構成した記録媒体を複
数枚積層した積層記録媒体と、前記積層記録媒体を回転
または移動させるための手段と、前記積層記録媒体の各
面に近接して配置され、前記記録媒体の回転、移動に伴
い周囲の環境ガスの抵抗によって所定の距離を保ちつつ
浮上し前記記録媒体の各記録薄膜上に情報に応じた記録
を行なう光学的記録ヘッドとを、外部環境の変化から隔
離するための気密ボックスの中に備えた光記録装置。(4) A recording medium comprising a recording thin film on both sides of a single substrate that changes reversibly or irreversibly between a plurality of states that can be detected by irradiation with a laser beam, or a recording thin film further provided with optical fibers on the surface of the recording thin film as necessary. A laminated recording medium comprising a plurality of laminated recording media formed with a protective layer that is transparent and has a thickness of at most several hundred micrometers, a means for rotating or moving the laminated recording medium, and a laminated recording medium. It is placed close to each surface of the medium, and as the recording medium rotates and moves, it floats while maintaining a predetermined distance due to the resistance of the surrounding environmental gas, and records information on each recording thin film of the recording medium. An optical recording device that includes an optical recording head and an airtight box for isolating it from changes in the external environment.
ことを特徴とする請求項（１）、（２）、（３）または
（４）のいずれかに記載の光記録装置。(5) The optical recording device according to any one of claims (1), (2), (3), and (4), wherein the recording medium is moved or rotated at a constant linear velocity.
面にも備えた光学的に平滑な基材の前記いずれの面にも
記録薄膜層を形成し、さらに記録膜を保護する目的で記
録膜よりも硬度が高く、かつ透明で厚さが高々数百ミク
ロンメートル程度の耐摩耗層を両面の記録層上に設け、
耐摩耗層側より記録光を照射することを特徴とする光記
録媒体。(6) A recording thin film layer is formed on either surface of an optically smooth base material having grooves or pit rows for guiding light on both surfaces, and further recording is performed for the purpose of protecting the recording film. A wear-resistant layer that is harder than the film, transparent, and has a thickness of at most several hundred micrometers is provided on the recording layer on both sides.
An optical recording medium characterized in that recording light is irradiated from the wear-resistant layer side.
層を設けたことを特徴とする請求項（６）記載の光記録
媒体。(7) The optical recording medium according to claim (6), characterized in that a dielectric layer is provided on both sides or on either side of the recording thin film layer.
する請求項（７）記載の光記録媒体。(8) The optical recording medium according to claim (7), characterized in that an optical reflective layer is provided on the surface of the substrate.
間の可逆的相変化現象を生じる物質を記録薄膜に用い、
相変化に伴う光学的特性の変化を信号として検出するこ
とによって書き換え可能な記録を行なうことを特徴とす
る請求項（１）、（２）、（３）または（４）のいずれ
かに記載の光記録装置。(9) Using a material that causes a reversible phase change phenomenon between an equilibrium phase and a non-equilibrium phase depending on the laser beam irradiation conditions for the recording thin film,
According to any one of claims (1), (2), (3), and (4), rewritable recording is performed by detecting changes in optical properties associated with phase changes as signals. Optical recording device.
度を変化させるだけでオーバライトすることを特徴とす
る請求項（９）記載の光記録装置。(10) The optical recording apparatus according to claim (9), wherein overwriting is performed on each recording surface by simply changing the irradiation intensity of a single laser beam.
相間の可逆的相変化現象を生じる物質を記録薄膜に用い
、相変化に伴う光学的特性の変化を信号として検出する
ことによって書き換え可能な記録を行なうことを特徴と
する請求項（６）、（７）または（８）のいずれかに記
載の光記録媒体。(11) Rewriting is possible by using a material that causes a reversible phase change between an equilibrium phase and a non-equilibrium phase in the recording thin film depending on the laser beam irradiation conditions, and detecting the change in optical properties accompanying the phase change as a signal. The optical recording medium according to any one of claims (6), (7), and (8), characterized in that recording is performed on the optical recording medium.
態間を可逆的または非可逆的に変化する記録薄膜を単板
基板の両面に備えた記録媒体、もしくは前記記録薄膜表
面にさらに必要に応じて光学的に透明で高々数百ミクロ
ンメートルの厚さの保護層を形成して構成した記録媒体
と、前記記録媒体を回転または移動させるための手段と
、前記記録媒体の両側の面にそれぞれ近接して配置され
、前記記録媒体の回転、移動に伴い周囲の環境ガスの抵
抗によって所定の距離を保ちつつ浮上し前記記録媒体の
各記録薄膜上に情報に応じた記録を行なう光学的記録ヘ
ッドとを備えて成り、前記光学的記録ヘッドがスライダ
ー部と対物レンズ部と偏向プリズムまたはミラー部とか
ら成ることを特徴とする光記録装置。(12) A recording medium comprising a recording thin film on both sides of a single substrate that changes reversibly or irreversibly between a plurality of states detectable by irradiation with a laser beam, or a recording thin film further provided on the surface of the recording thin film as necessary. A recording medium formed by forming an optically transparent protective layer with a thickness of at most several hundred micrometers, a means for rotating or moving the recording medium, and a means for rotating or moving the recording medium, and a means for rotating or moving the recording medium, and a means for rotating or moving the recording medium, and a means for rotating or moving the recording medium, and a means for rotating or moving the recording medium, and a means for rotating or moving the recording medium, and a means for rotating or moving the recording medium, and a means for rotating or moving the recording medium, and a means for rotating or moving the recording medium, and a means for rotating or moving the recording medium. an optical recording head that is arranged at a position where the recording medium is rotated and moved, flies while maintaining a predetermined distance due to the resistance of surrounding environmental gas, and performs recording according to information on each recording thin film of the recording medium; An optical recording device comprising: an optical recording head comprising a slider section, an objective lens section, and a deflection prism or mirror section.
たはミラー部を同一材質を用いて一体成形したことを特
徴とする光学的記録ヘッド。(13) An optical recording head characterized in that the slider section, objective lens section, and deflection prism or mirror section are integrally molded using the same material.
徴とする請求項（１３）記載の光学的記録ヘッド。(14) The optical recording head according to claim 13, wherein the lens portion has a numerical aperture of 0.6 or more.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1197741A JPH0362321A (en) | 1989-07-28 | 1989-07-28 | Optical recording device |
| US07/555,639 US5255260A (en) | 1989-07-28 | 1990-07-23 | Optical recording apparatus employing stacked recording media with spiral grooves and floating optical heads |
| KR1019900011248A KR950001234B1 (en) | 1989-07-28 | 1990-07-24 | Optical recording apparatus |
| EP90308112A EP0410704B1 (en) | 1989-07-28 | 1990-07-25 | Optical recording apparatus |
| EP94202946A EP0639830B1 (en) | 1989-07-28 | 1990-07-25 | Optical recording apparatus |
| DE69030960T DE69030960T2 (en) | 1989-07-28 | 1990-07-25 | Optical recording device |
| DE69022792T DE69022792T2 (en) | 1989-07-28 | 1990-07-25 | Optical recording device. |
| CA002022005A CA2022005C (en) | 1989-07-28 | 1990-07-26 | Optical recording apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1197741A JPH0362321A (en) | 1989-07-28 | 1989-07-28 | Optical recording device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0362321A true JPH0362321A (en) | 1991-03-18 |
Family
ID=16379571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1197741A Pending JPH0362321A (en) | 1989-07-28 | 1989-07-28 | Optical recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0362321A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0397134A (en) * | 1989-09-08 | 1991-04-23 | Sony Corp | Optical recording medium |
| JPH06295482A (en) * | 1993-02-22 | 1994-10-21 | Digital Equip Corp <Dec> | Both side optical medium for disk storage device |
| JPH10320775A (en) * | 1997-05-19 | 1998-12-04 | Sony Corp | Access method for optical disk and optical disk device |
| JPH1139660A (en) * | 1997-05-19 | 1999-02-12 | Sony Corp | Manufacture of optical disk, optical disk and optical disk device |
| KR100523522B1 (en) * | 1996-12-20 | 2006-01-12 | 소니 가부시끼 가이샤 | Optical disc recording and reproducing apparatus and method |
| KR100528555B1 (en) * | 1997-04-25 | 2006-03-24 | 소니 가부시끼 가이샤 | Optical record carriers and optical disc devices |
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| JPS6132233A (en) * | 1984-07-23 | 1986-02-14 | Nec Home Electronics Ltd | Additional recording type optical head |
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| JPS60214468A (en) * | 1984-04-11 | 1985-10-26 | Pioneer Electronic Corp | Automatic loading disc player |
| JPS6132233A (en) * | 1984-07-23 | 1986-02-14 | Nec Home Electronics Ltd | Additional recording type optical head |
| JPS61250843A (en) * | 1985-04-30 | 1986-11-07 | Nec Home Electronics Ltd | Optical information recording and reproducing device |
| JPS63224027A (en) * | 1987-03-13 | 1988-09-19 | Nippon Telegr & Teleph Corp <Ntt> | Optical recording/reproducing device |
| JPS63241701A (en) * | 1987-03-27 | 1988-10-07 | Fujitsu Ltd | Information processing method for disk substrate |
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|---|---|---|---|---|
| JPH0397134A (en) * | 1989-09-08 | 1991-04-23 | Sony Corp | Optical recording medium |
| JPH06295482A (en) * | 1993-02-22 | 1994-10-21 | Digital Equip Corp <Dec> | Both side optical medium for disk storage device |
| KR100523522B1 (en) * | 1996-12-20 | 2006-01-12 | 소니 가부시끼 가이샤 | Optical disc recording and reproducing apparatus and method |
| KR100528555B1 (en) * | 1997-04-25 | 2006-03-24 | 소니 가부시끼 가이샤 | Optical record carriers and optical disc devices |
| JPH10320775A (en) * | 1997-05-19 | 1998-12-04 | Sony Corp | Access method for optical disk and optical disk device |
| JPH1139660A (en) * | 1997-05-19 | 1999-02-12 | Sony Corp | Manufacture of optical disk, optical disk and optical disk device |
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