JPH0261845A - Magneto-optical recording medium driving device - Google Patents
Magneto-optical recording medium driving deviceInfo
- Publication number
- JPH0261845A JPH0261845A JP21321288A JP21321288A JPH0261845A JP H0261845 A JPH0261845 A JP H0261845A JP 21321288 A JP21321288 A JP 21321288A JP 21321288 A JP21321288 A JP 21321288A JP H0261845 A JPH0261845 A JP H0261845A
- Authority
- JP
- Japan
- Prior art keywords
- head
- optical
- magneto
- disk
- magnetic head
- 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
- 230000003287 optical effect Effects 0.000 claims abstract description 34
- 230000001427 coherent effect Effects 0.000 claims 1
- 239000000758 substrate Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 230000010287 polarization Effects 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 206010041662 Splinter Diseases 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10532—Heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野]
この発明は光磁気ディスク駆動装置に関し、特にその光
へンド及び磁気ヘッドの改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magneto-optical disk drive, and particularly to improvements in its optical head and magnetic head.
光磁気ディスク駆動装置は書き替え可能な大容量記憶媒
体を駆動する装置として開発されたものであり、記録方
式の違いにより光変調方式と磁界変調方式とがある。光
変調方式は情報信号を先の点滅に変調して記録するもの
であり、記録の前に磁化の向きをそろえる必要があり、
このため消去用にディスクを一回転させるか、または消
去用ヘッドを別に設ける必要があった。また磁界変調方
式は、情報信号を磁界の向きに変調して記録するもので
あり、消去と記録とを同時に行うことができ、高速アク
セスできる。しかしこの方式は光変調方式に比べ磁気ヘ
ッドをディスクに対して数ミクロンの距離に近接させる
必要があり、従来は固定磁気ディスク装置に用いられて
いる浮動ヘッドと同様な構造のヘッドを磁気ヘッドとし
て用い、磁気ヘッドをディスクに近接させている。A magneto-optical disk drive device was developed as a device for driving a rewritable large-capacity storage medium, and there are two types of recording methods: an optical modulation method and a magnetic field modulation method. The optical modulation method records information signals by modulating them into flashes, and it is necessary to align the direction of magnetization before recording.
For this reason, it was necessary to rotate the disk once for erasing, or to provide a separate erasing head. Furthermore, the magnetic field modulation method records information signals by modulating them in the direction of a magnetic field, and can perform erasing and recording at the same time, allowing high-speed access. However, compared to the optical modulation method, this method requires the magnetic head to be placed several microns closer to the disk. Conventionally, a head with a structure similar to the floating head used in fixed magnetic disk drives was used as the magnetic head. The magnetic head is placed close to the disk.
いずれの方式の光磁気ディスク駆動装置においても、従
来は光ヘッドのレーザ源より発生したレーザ光をディス
ク上の一面に1〜2ミクロン径に集束して照射すると共
に、その照射位置と対向する他面に磁気ヘッドを設け、
バイアス磁界を印加していた。従ってディスクの両面を
はさみ光ヘッドと磁気ヘッドとが対向しており、その構
造が複雑となり、またディスクへの高速アクセスに対し
ても制限があった。In either type of magneto-optical disk drive, conventionally, a laser beam generated from a laser source of an optical head is focused on one surface of the disk to a diameter of 1 to 2 microns, and a laser beam that is opposite to the irradiation position is irradiated. A magnetic head is installed on the surface,
A bias magnetic field was applied. Therefore, the optical head and the magnetic head face each other on both sides of the disk, making the structure complicated and also limiting high-speed access to the disk.
一方光ヘッドと磁気ヘッドとを一体化し、片面からのア
クセスを可能としたものとして、光メモリシンポジウム
゛85 (P165.1985.12)に発表された2
ヘツド型の光磁気ディスク装置がある。これは記録を再
生とに各別のヘッドを有し、磁気ヘッドを永久磁石とし
たものである。しかしながらこの光磁気ディスク装置は
2ヘンド構造のため、価格が高くなり、また構造も複雑
になっていた。On the other hand, 2, which was announced at the Optical Memory Symposium 1985 (P165, December 1985), integrated an optical head and a magnetic head and enabled access from one side.
There is a head-type magneto-optical disk device. This has separate heads for recording and reproduction, and the magnetic head is a permanent magnet. However, since this magneto-optical disk device has a two-handed structure, it is expensive and has a complicated structure.
この発明は上記の事情に鑑みなされたものであたり、浮
動型の磁気ヘッドに光ヘッドの光学系を設けることによ
り、ディスクの片面から光及び磁気へラドによる、消去
及び記録を同時に行うオーバライドを可能とし、構造を
簡素化した光磁気記録媒体駆動装置を得ることを目的と
する。This invention was made in view of the above circumstances, and by providing an optical head optical system to a floating magnetic head, it is possible to perform override for simultaneously erasing and recording from one side of the disk using light and magnetic fields. The object of the present invention is to obtain a magneto-optical recording medium drive device with a simplified structure.
〔課題を解決するための手段〕
この発明に係る光磁気記録媒体駆動装置は、浮動型の磁
気ヘッドに光ヘッドの光学系を設けたものである。[Means for Solving the Problems] A magneto-optical recording medium drive device according to the present invention includes a floating magnetic head provided with an optical system of an optical head.
この発明によれば、浮動型の磁気ヘッドに光ヘッドの光
学系を設けて、磁気ヘッドと光学系とを一体化したので
、ヘッドの構造が簡素化し、光磁気記録媒体の片面から
のアクセスによるオーバライドを可能とする。According to this invention, the floating magnetic head is provided with the optical system of the optical head, and the magnetic head and the optical system are integrated, which simplifies the structure of the head and allows access from one side of the magneto-optical recording medium. Allow override.
以下この発明をその一実施例を示す図面に基づいて説明
する。The present invention will be explained below based on the drawings showing one embodiment thereof.
第1図はこの発明に係る光磁気記録媒体駆動装置(以下
駆動装置という)の一部を示す破断斜視図、第2図は磁
気ヘッドの拡大正面図である。第1図において5は円板
状の光磁気ディスク(以下ディスクという)であり、該
ディスク5は基板5aと、該基板5a上に積層された非
晶質の磁性層5bとを有している。ディスク5の上面に
は浮動型の磁気ヘッド1が面しており、該ヘッドlは弾
性を有するブラケット4の一端に取り付けられ、ディス
ク4の矢符方向の回転により生ずる動圧によりブラケッ
ト4の弾性力に抗してディスク4から数ミクロン浮上す
る。FIG. 1 is a cutaway perspective view showing a part of a magneto-optical recording medium drive device (hereinafter referred to as the drive device) according to the present invention, and FIG. 2 is an enlarged front view of a magnetic head. In FIG. 1, 5 is a disc-shaped magneto-optical disk (hereinafter referred to as a disk), and the disk 5 has a substrate 5a and an amorphous magnetic layer 5b laminated on the substrate 5a. . A floating magnetic head 1 faces the upper surface of the disk 5. The head 1 is attached to one end of an elastic bracket 4, and the dynamic pressure generated by the rotation of the disk 4 in the direction of the arrow causes the elasticity of the bracket 4 to be It resists the force and floats up several microns from the disk 4.
磁気ヘッドlは矩形平板状をなし、前記動圧により浮上
するスライダ部11と、該スライダ部11の一端に取り
付けられ、略コ字状の側面を有するコア12と、該コア
12の一側(100ミクロン角断面)に巻回されたコイ
ル13とを有している。The magnetic head l has a rectangular flat plate shape, and includes a slider section 11 that floats due to the dynamic pressure, a core 12 that is attached to one end of the slider section 11 and has a substantially U-shaped side surface, and one side of the core 12 ( It has a coil 13 wound around a 100 micron square cross section.
またコア12の一側のコイル13の下方には100ミク
ロン以下の空間にまとめられた光ヘッドの光学系2が設
けられている。光学系2には、以下のものが配設されて
いる。即ち半導体レーザ素子21、該素子21を取りイ
」け、そこからの熱を放熱するヒートシンク22、半導
体レーザ素子21の出射方向に、半導体レーザ素子21
から所定の放射角で出射されたレーザ光を平行ビームに
するためのコリメータレンズ23及びディスク5への入
射光と、そこからの反射光とを分離するビームスプリン
タ24が順次配設されている。該ビームスプリンタ24
の透過方向には、ディスク5上に入射させるレーザ光を
直径1〜2ミクロンのスポットに絞るための対物レンズ
25が配設されている。Further, below the coil 13 on one side of the core 12, an optical system 2 of an optical head is provided which is arranged in a space of 100 microns or less. The optical system 2 is provided with the following items. That is, the semiconductor laser element 21, the heat sink 22 that radiates heat from the semiconductor laser element 21, and the semiconductor laser element 21 are placed in the emission direction of the semiconductor laser element 21.
A collimator lens 23 for collimating laser light emitted from the disc 5 at a predetermined radiation angle and a beam splinter 24 for separating light incident on the disk 5 from light reflected therefrom are disposed in this order. The beam splinter 24
An objective lens 25 is disposed in the transmission direction for focusing the laser beam incident on the disk 5 into a spot with a diameter of 1 to 2 microns.
一方、ビームスプリッタ24の反射方向には、反射光の
偏光面を45°回転させるλ/2板26と、偏光面に依
存して反射光を透過及び反射する偏光ビームスプリッタ
27とが設けられている。On the other hand, in the reflection direction of the beam splitter 24, a λ/2 plate 26 that rotates the polarization plane of the reflected light by 45 degrees and a polarizing beam splitter 27 that transmits and reflects the reflected light depending on the polarization plane are provided. There is.
また偏光ビームスプリッタ27の透過方向には反射ビー
ムを複数の受光面で受光し、トラッキングエラを検出す
るフォトダイオード29が設けられ、偏光ビームスプリ
ッタ27の反射方向には偏光角を検出するフォトダイオ
ード28が設けられている。Further, a photodiode 29 is provided in the transmission direction of the polarization beam splitter 27 to detect the tracking error by receiving the reflected beam with a plurality of light receiving surfaces, and a photodiode 28 is provided in the reflection direction of the polarization beam splitter 27 to detect the polarization angle. is provided.
またフォトダイオード29及び同28の出力は再生信号
RFを生成するプリアンプ3に与えられる。Further, the outputs of the photodiodes 29 and 28 are given to the preamplifier 3 which generates a reproduced signal RF.
以上のように構成されたこの発明の駆動装置にあっては
、磁界変調方式を用い、記録時には一定の光量のレーザ
光をディスク5に照射すると共に、磁気ヘッド1から記
録信号RSに応じて変調した磁界を磁性層5bに印加し
、記録を行う。また再生時にはフォトダイオード28及
び同29の出力信号により、再生信号RFをプリアンプ
3にて生成する。さらに記録及び消去時の磁気ヘッド1
のトラッキング制御はフォトセンサ28の複数の受光面
の受光量に応じてサーボ制御される。また磁気ヘッドl
が浮動型のため浮上量が安定しているので、浮上量に合
わせて対物レンズ25の焦点距離を定めることによりフ
ォーカス制御は行う必要がない。The drive device of the present invention configured as described above uses a magnetic field modulation method to irradiate the disk 5 with a constant amount of laser light during recording, and modulates the laser light from the magnetic head 1 according to the recording signal RS. The magnetic field thus obtained is applied to the magnetic layer 5b to perform recording. Further, during reproduction, a reproduction signal RF is generated by the preamplifier 3 based on the output signals of the photodiodes 28 and 29. Furthermore, the magnetic head 1 during recording and erasing
The tracking control is performed by servo control according to the amount of light received by the plurality of light receiving surfaces of the photosensor 28. Also, the magnetic head
Since it is a floating type, the flying height is stable, so there is no need to perform focus control by determining the focal length of the objective lens 25 according to the flying height.
なお、この実施例では光学系を超小型のレンズ等の光学
部品を用い構成したが、この発明はこれに限るものでは
なく光学系を先導波路等の集積型光部品を用いてもよい
ことはいうまでもない。In this embodiment, the optical system is constructed using optical components such as ultra-small lenses, but the present invention is not limited to this, and the optical system may be constructed using integrated optical components such as a guiding waveguide. Needless to say.
[発明の効果]
以上説明したとおり、この発明においては、光磁気ディ
スク駆動装置の光学系を超小型化し、浮動型の磁気ヘッ
ドに設けたので、バイアス磁界とレーザ光をディスクの
片面から印加及び照射でき、磁界変調によるオーバライ
ドを可能とし、構造を簡素化した光磁気記録媒体駆動装
置を得る効果がある。[Effects of the Invention] As explained above, in this invention, the optical system of the magneto-optical disk drive device is ultra-miniaturized and installed in a floating magnetic head, so that the bias magnetic field and laser beam can be applied from one side of the disk. This has the effect of providing a magneto-optical recording medium drive device that can irradiate light, enable override by magnetic field modulation, and has a simplified structure.
第1図はこの発明に係る光磁気記録媒体駆動装置の一部
を示す破断斜視図、第2図は磁気ヘッドの拡大正面図で
ある。
1・・・石荘気ヘッド
ディスク
2・・・光学系
5・・・光磁気
なお、図中、同一符号は同一または相当部分を示す。
手
続
補
正
書(自発)
1、事件の表示
特願昭
万
2、発明の名称
光磁気記録媒体駆動装置
3、補正をする者
事件との関係 特許出願人
住 所 東京都千代田区丸の内二丁目2番3号名
称 (601)三菱電機株式会社代表者志岐守哉
4、代 理
住所
人
東京都千代田区丸の内二丁目2番3号
三菱電機株式会社内
(7375)弁理士 大 岩 増 雄、 \、(連絡
先03(213) 3421持許部)5、補正の対象
明細書の「発明の詳細な説明」の欄
6、補正の内容
(1)明細書第5頁の第5行にr (100ミクロン角
断面)」とあるのをr (1000ミクロン角断面)」
と訂正する。
(2) 明細書第5頁の第7〜8行に「コイル13の
下方には100 ミクロン」とあるのを「コイル13の
下方には1000ミクロン」と訂正する。
以上FIG. 1 is a partially cut away perspective view of a magneto-optical recording medium drive device according to the present invention, and FIG. 2 is an enlarged front view of a magnetic head. Reference numerals 1... Stone head disk 2... Optical system 5... Optical magnetism Note that in the drawings, the same reference numerals indicate the same or corresponding parts. Procedural amendment (spontaneous) 1. Indication of the case Patent application 1986, Name of the invention Magneto-optical recording medium drive device 3. Person making the amendment Relationship to the case Patent applicant address 2-2 Marunouchi, Chiyoda-ku, Tokyo 3. Name (601) Mitsubishi Electric Corporation Representative Moriya Shiki 4, Acting Address Mitsubishi Electric Corporation, 2-2-3 Marunouchi, Chiyoda-ku, Tokyo (7375) Patent Attorney Masuo Oiwa, \, (Contact information: 03 (213) 3421 Permits Department) 5. Column 6 of “Detailed Description of the Invention” of the specification to be amended. Contents of the amendment (1) In the 5th line of the 5th page of the specification, r (100 "r (1000 micron square cross section)"
I am corrected. (2) In lines 7 and 8 of page 5 of the specification, the statement "100 microns below the coil 13" is corrected to "1000 microns below the coil 13."that's all
Claims (1)
る光ヘッドと、該光ヘッドの照射位置にバイアス磁界を
印加する浮動型の磁気ヘッドとを備えた光磁気記録媒体
駆動装置において、 前記磁気ヘッドに、前記光学系を設けてあることを特徴
とする光磁気記録媒体駆動装置。[Claims] 1. A magneto-optical head comprising an optical head having an optical system that irradiates coherent light onto a magneto-optical recording medium, and a floating magnetic head that applies a bias magnetic field to the irradiation position of the optical head. A magneto-optical recording medium drive, characterized in that the magnetic head is provided with the optical system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21321288A JPH0261845A (en) | 1988-08-26 | 1988-08-26 | Magneto-optical recording medium driving device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21321288A JPH0261845A (en) | 1988-08-26 | 1988-08-26 | Magneto-optical recording medium driving device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0261845A true JPH0261845A (en) | 1990-03-01 |
Family
ID=16635399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21321288A Pending JPH0261845A (en) | 1988-08-26 | 1988-08-26 | Magneto-optical recording medium driving device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0261845A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6611487B2 (en) | 1993-02-17 | 2003-08-26 | Hitachi, Ltd. | Flying type optical head integrally formed with light source and photodetector and optical disk apparatus with the same |
WO2010113489A1 (en) | 2009-03-31 | 2010-10-07 | 独立行政法人産業技術総合研究所 | Carbon dioxide coating method and device therefor |
-
1988
- 1988-08-26 JP JP21321288A patent/JPH0261845A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6611487B2 (en) | 1993-02-17 | 2003-08-26 | Hitachi, Ltd. | Flying type optical head integrally formed with light source and photodetector and optical disk apparatus with the same |
WO2010113489A1 (en) | 2009-03-31 | 2010-10-07 | 独立行政法人産業技術総合研究所 | Carbon dioxide coating method and device therefor |
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