JPH01286152A - Magneto-optical disk manufacture equipment - Google Patents
Magneto-optical disk manufacture equipmentInfo
- Publication number
- JPH01286152A JPH01286152A JP11613088A JP11613088A JPH01286152A JP H01286152 A JPH01286152 A JP H01286152A JP 11613088 A JP11613088 A JP 11613088A JP 11613088 A JP11613088 A JP 11613088A JP H01286152 A JPH01286152 A JP H01286152A
- Authority
- JP
- Japan
- Prior art keywords
- magneto
- optical disk
- optical
- magnetic field
- magnet
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 238000011423 initialization method Methods 0.000 description 1
- 230000001678 irradiating effect Effects 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は光磁気ディスク製造装置、特に、光磁気ディス
クを初期化するための光磁気ディスク製造装置に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magneto-optical disk manufacturing apparatus, and particularly to a magneto-optical disk manufacturing apparatus for initializing a magneto-optical disk.
従来、光磁気ディスクの初期化は光磁気ディスク装置を
用いていた。Conventionally, magneto-optical disk devices have been used to initialize magneto-optical disks.
しかしながら、このような従来の初期化法は光ビームが
一本の光ヘッドを使用した装置を使っているため溝部ま
たはランド部のどちらか一方にしか初期化できない。こ
のため、光磁気ディスクの全面の初期化をするには一時
間以上の時間を必要とするとともに、初期化が不完全で
あるため特性に悪影響が出て、多量の光磁気ディスクを
製造するためには多数の装置を設置しなければ処理でき
ないという欠点がある。However, since such a conventional initialization method uses a device that uses an optical head with a single light beam, it is possible to initialize only either the groove portion or the land portion. For this reason, it takes more than an hour to initialize the entire surface of a magneto-optical disk, and the incomplete initialization adversely affects the characteristics, making it difficult to manufacture a large number of magneto-optical disks. has the disadvantage that it cannot be processed without installing a large number of devices.
本発明の光磁気ディスク製造装置は、溝部を初期化する
第一の光ビームとランド部を初期化するための第二の光
ビームとを発生する光ヘッドと、光ヘッドを制御する光
ヘッド制御回路とを有して構成される。The magneto-optical disk manufacturing apparatus of the present invention includes an optical head that generates a first light beam for initializing a groove portion and a second light beam for initializing a land portion, and an optical head control that controls the optical head. and a circuit.
次に、本発明の実施例について、図面を参照して説明す
る。Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示すブロック図、第２図は
第１図に示す実施例を使用して初期化される溝部および
ランド部を示す模式図である。FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a schematic diagram showing grooves and lands that are initialized using the embodiment shown in FIG.
第１図に示す光磁気ディスク製造装置は、回転スピンド
ル６と、マグネット３と、光ヘッド２と、レーザパワー
制御と光ヘッド位置制御と、フォーカス制御とトラッキ
ング制御とを行なう光ヘッド制御回路４と、磁界制御回
路５とを含んで構成される。The magneto-optical disk manufacturing apparatus shown in FIG. 1 includes a rotating spindle 6, a magnet 3, an optical head 2, an optical head control circuit 4 that performs laser power control, optical head position control, focus control, and tracking control. , and a magnetic field control circuit 5.
回転スピンドル６に取り付けられた光磁気ディスク１は
毎分１８００ｒｐｍ以上の回転数で回転する。光磁気デ
ィスク１の媒体面上には光ヘッド制御回路４でフォーカ
ス制御ならびにトラッキング制御され集束された光ビー
ム７．８が照射される。The magneto-optical disk 1 attached to the rotating spindle 6 rotates at a rotation speed of 1800 rpm or more. The medium surface of the magneto-optical disk 1 is irradiated with a focused light beam 7.8 which is subjected to focus control and tracking control by the optical head control circuit 4.
これと同時に磁界制御回路５で制御されるマグネット３
により媒体面上に数百エルステッドの磁界が加えられる
。光ビーム７．８が照射された部分は加熱されることに
よりマグネット３の磁界で磁化反転を起こしマグネット
３が発生する磁化方向に媒体の磁化方向が揃えられるこ
とになる。At the same time, the magnet 3 is controlled by the magnetic field control circuit 5.
A magnetic field of several hundred oersteds is applied on the medium surface. The portion irradiated with the light beam 7.8 is heated, causing magnetization reversal by the magnetic field of the magnet 3, and the magnetization direction of the medium is aligned with the magnetization direction generated by the magnet 3.
光ヘッド２は第２図に示すように光磁気ディスクｌの溝
部９を加熱する光ビーム７と、ランド部１０を加熱する
光ビーム８をもち溝部９およびランド部１０を初期化す
ることを受は持っている。As shown in FIG. 2, the optical head 2 has a light beam 7 that heats the groove portion 9 of the magneto-optical disk l and a light beam 8 that heats the land portion 10, and receives initialization of the groove portion 9 and the land portion 10. has.
このような光ビーム７．８を光磁気ディスク１の全面に
照射することにより媒体面の全面を初期化することがで
きる。By irradiating the entire surface of the magneto-optical disk 1 with such a light beam 7.8, the entire surface of the medium can be initialized.
本発明の光磁気ディスク製造装置は、溝部を初期化する
光ビームとランド部を初期化する光ビームの二つの光ビ
ームを出力する光ヘッドを設けたことにより、初期化に
必要な時間を半減できるという効果がある。The magneto-optical disk manufacturing apparatus of the present invention is provided with an optical head that outputs two light beams: a light beam for initializing the groove portion and a light beam for initializing the land portion, thereby halving the time required for initialization. There is an effect that it can be done.
また、この光ヘッドを複数個使用することにより、さら
に時間を短縮できるという効果がある。Further, by using a plurality of these optical heads, there is an effect that the time can be further reduced.
第１図は本発明の一実施例を示すブロック図、第２図は
第１図に示す実施例を使用して初期化される溝部および
ランド部を示す模式図である。
１・・・・・・光磁気ディスク、２・・・・・・光ヘッ
ド、３・・・・・・マグネット、４・・・・・・光ヘッ
ド制御回路、５・・・・・・磁界制御回路、６・・・・
・・スピンドル、７゜８・・・・・・光ビーム、９・・
・・・・溝部、１０・・・・・・ランド部。
代理人 弁理士 内 原 音FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a schematic diagram showing grooves and lands that are initialized using the embodiment shown in FIG. DESCRIPTION OF SYMBOLS 1... Magneto-optical disk, 2... Optical head, 3... Magnet, 4... Optical head control circuit, 5... Magnetic field. Control circuit, 6...
...Spindle, 7°8...Light beam, 9...
...Groove portion, 10...Land portion. Agent Patent Attorney Oto Uchihara
Claims (1)
記マグネットが発生する磁界を抑制するための磁界制御
回路と、前記光磁気ディスクの溝部を初期化するための
第一の光ビームとランド部を初期化するための第二の光
ビームとを発生する光ヘッドと、前記光ヘッドを制御す
る光ヘッド制御回路とを含むことを特徴とする光磁気デ
ィスク製造装置。A magnet for applying a magnetic field to the magneto-optical disk, a magnetic field control circuit for suppressing the magnetic field generated by the magnet, a first light beam for initializing the groove portion of the magneto-optical disk, and a land portion. 1. A magneto-optical disk manufacturing apparatus comprising: an optical head that generates a second light beam for converting images; and an optical head control circuit that controls the optical head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11613088A JPH01286152A (en) | 1988-05-12 | 1988-05-12 | Magneto-optical disk manufacture equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11613088A JPH01286152A (en) | 1988-05-12 | 1988-05-12 | Magneto-optical disk manufacture equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01286152A true JPH01286152A (en) | 1989-11-17 |
Family
ID=14679461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11613088A Pending JPH01286152A (en) | 1988-05-12 | 1988-05-12 | Magneto-optical disk manufacture equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01286152A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62208444A (en) * | 1986-03-06 | 1987-09-12 | Nec Corp | Photomagnetic recording method |
| JPS62208445A (en) * | 1986-03-06 | 1987-09-12 | Nec Corp | Photomagnetic recording method |
| JPH01273251A (en) * | 1988-04-26 | 1989-11-01 | Canon Inc | How to initialize magneto-optical recording media |
| JPH01276454A (en) * | 1988-04-27 | 1989-11-07 | Canon Inc | Initializing method for magneto-optical recording medium |
-
1988
- 1988-05-12 JP JP11613088A patent/JPH01286152A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62208444A (en) * | 1986-03-06 | 1987-09-12 | Nec Corp | Photomagnetic recording method |
| JPS62208445A (en) * | 1986-03-06 | 1987-09-12 | Nec Corp | Photomagnetic recording method |
| JPH01273251A (en) * | 1988-04-26 | 1989-11-01 | Canon Inc | How to initialize magneto-optical recording media |
| JPH01276454A (en) * | 1988-04-27 | 1989-11-07 | Canon Inc | Initializing method for magneto-optical recording medium |
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