JPS59117703A - Photomagnetic disc device - Google Patents

Photomagnetic disc device

Info

Publication number
JPS59117703A
JPS59117703A JP23067782A JP23067782A JPS59117703A JP S59117703 A JPS59117703 A JP S59117703A JP 23067782 A JP23067782 A JP 23067782A JP 23067782 A JP23067782 A JP 23067782A JP S59117703 A JPS59117703 A JP S59117703A
Authority
JP
Japan
Prior art keywords
magnetic field
recording
recording medium
information
prescribed
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
Application number
JP23067782A
Other languages
Japanese (ja)
Inventor
Yasuyuki Ozawa
靖之 小沢
Masaharu Moritsugu
森次　政春
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP23067782A priority Critical patent/JPS59117703A/en
Publication of JPS59117703A publication Critical patent/JPS59117703A/en
Pending legal-status Critical Current

Links

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
    • G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
    • 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
    • G11B11/10502—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 characterised by the transducing operation to be executed
    • G11B11/10504—Recording

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To attain write of information in a short time by providing a recording disc turned on which a recording medium recording information is provided, an optical system irradiating a prescribed region of the recording medium and a magnetic field generator or the like impressing a magnetic field to the recording medium. CONSTITUTION:Doughnut-shaped permanent magnets 12, 13 having a prescribed size are placed with a prescribed interval on the recording disc 11 applied with a photomagnetic recording medium in a photomagnetic disc device respectively. On the other hand, Ar laser light or the like, formed as a prescribed beam, is irradiated to the region on the prescribed recording disc 11 via condensor lenses 14, 15 from the upper part of the magnets 12, 13. Thus, the write of information is attained in a short time without turning wait time of a disc required for a conventional system by combining independently and individually a magnet and an optical system having different direction of magnetic field in this way.

Description

【発明の詳細な説明】 （ａ）　　発明の技術分野 本発明は光磁気ディスク装置に係り、特にディスクの回
転待ち時間を短縮して、情報の記Ｈを可能とした光磁気
ディスク装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a magneto-optical disk device, and more particularly to a magneto-optical disk device that shortens disk rotation waiting time and enables information to be recorded.

（１））　　技術の背景 磁性体膜を形成した記録円板上に所定のレーザ光による
光信号を照射してその光の熱磁気作用によって情報を記
録する光磁気記録は従来の磁気記録方式に比し高密度、
大容量の記録がなされるので最近広く開発されている。(1)) Background of the technology Magneto-optical recording, in which information is recorded by the thermomagnetic action of the light by irradiating an optical signal from a predetermined laser beam onto a recording disk on which a magnetic film is formed, is different from the conventional magnetic recording method. Higher density compared to
It has been widely developed recently because it allows for large-capacity recording.

（Ｃ）　　従来技術と問題点 このような光磁気記録方法における光磁気ディスク装置
について第１図を用いながら説明する。(C) Prior Art and Problems A magneto-optical disk device using such a magneto-optical recording method will be described with reference to FIG.

第１図は従来の光磁気ディスクの装置の概略図テ例えば
ガドリニウム、テルビウム、５（ＧＬ′ｉ’ｒｂＦｅ　
）よりなる光磁気記録媒体を塗布し、回転する記録円板
ｌ上の一部領域に所定の電流をｎｒ定の方向に印加した
バイアスコイ）Ｌ／２によって一定方向の磁界（Ｈｅｘ
　）を印加する。また一方該円板Ｉの上部よシ例えばア
ルゴン（Ａｒ）ガヌレーザよシナルレーザビーム３を照
射することで該ビーム゛が照射された領域Ａがバイアス
コイ／Ｌ／２の磁界の方向に磁化される。上記光ビーム
８は集光レンズ４によって１〜２μｌｌｌφ程度に絞シ
込めるので高密度記録が可能である。また更にバイアス
コイル２に印加する電流の方向を逆方向にすることでバ
イアスコイルの磁場の向きを第１図と反対の方向になる
ようにして、光ビーム３を連続的に照射すれば媒体の磁
化の向きはすべて一方向に向き、記録された情報は消去
されて新たな情報の書き込みが可能となる。FIG. 1 is a schematic diagram of a conventional magneto-optical disk device. For example, gadolinium, terbium, 5 (GL'i'rbFe
) is coated with a magneto-optical recording medium, and a predetermined current is applied to a part of the rotating recording disk l in a fixed direction (nr).
) is applied. On the other hand, by irradiating the upper part of the disk I with a signal laser beam 3, such as an argon (Ar) Gannulas laser, the area A irradiated with the beam is magnetized in the direction of the magnetic field of the bias coil/L/2. . The light beam 8 can be condensed to about 1 to 2 .mu.lll.phi. by the condensing lens 4, so that high-density recording is possible. Furthermore, by reversing the direction of the current applied to the bias coil 2, the direction of the magnetic field of the bias coil is made opposite to that shown in FIG. 1, and the light beam 3 is continuously irradiated. The direction of magnetization is all oriented in one direction, and recorded information is erased, making it possible to write new information.

図で矢印Ｂは円板の移動方向を示しＣは記録媒体の磁化
の方向を示す。In the figure, arrow B indicates the direction of movement of the disk, and arrow C indicates the direction of magnetization of the recording medium.

を実施出来ないので、回転待ち時間が従来の磁気ディス
ク装置に比して畏くなる欠点を有する。Since it is not possible to perform the following, it has the disadvantage that the rotational waiting time is longer than that of conventional magnetic disk drives.

まだ更にバイアスコイルを用いて情報の書き込みおよび
消去を行っており、該バイアスコイルは、２００〜３０
０工〜ステツドの高い磁界を与えねばならず他の光学系
に比べかなり大型で、かつ消費電力も大きく光磁気ディ
スク装置全体が発熱する等好ましくない。In addition, bias coils are used to write and erase information, and the bias coils have a capacity of 200 to 30
It is undesirable that a high magnetic field of 0 to 30 degrees must be applied, which is considerably larger than other optical systems, consumes a large amount of power, and generates heat in the entire magneto-optical disk device.

（ｄ）　　発明の目的 成さ１する光磁気ディヌク装置が小型で安価なものとな
る利点を有する。(d) Objects of the Invention The magneto-optical Dinuk device (1) has the advantage of being small and inexpensive.

帆）発明の効果 以上述べたように本発明の光磁気ディスク装置によれば
ディヌクの回転待ち時間を必要としないので短時間で情
報の消去、書き込みが可能となり、またコンパクトで発
熱等の現象を生じない光磁気ディスク装置が得られる利
点を生じる。Effects of the Invention As described above, the magneto-optical disk device of the present invention does not require waiting time for the rotation of the dinuks, so information can be erased and written in a short period of time, and it is compact and prevents phenomena such as heat generation. This provides the advantage of providing a magneto-optical disk device that does not require the use of magnetic disks.

ある。be.

図において１．１１は記録円板、２はコイル、３は光ビ
ーム、４，１４．ｉ５は集光レンズ、ｌ＆１３Ｆｉ水久
磁石、Ａは照射領域、Ｂは円板の進行方向、Ｃは記録媒
体の磁化方向、Ｄは消去すべき情報を有する領域、Ｅは
新たに書き込まれた情報を有する領域。In the figure, 1.11 is a recording disk, 2 is a coil, 3 is a light beam, 4, 14 . i5 is a condensing lens, 1&13Fi Mizuhisa magnet, A is the irradiation area, B is the traveling direction of the disk, C is the magnetization direction of the recording medium, D is the area with information to be erased, and E is the newly written information area with

Claims (1)

【特許請求の範囲】[Claims] 情報を光磁気効果を利用して記録する記録媒体を有１７
て回転する記録円板と、前記記録媒体の所定の領域を照
射する光学系と前記記＠媒体の所定の領域に磁界を印加
する磁界発生装置とからなる光磁気ディスク装置におい
て、前記光学系と磁界発生装置を組として前記磁界の発
生方向をそれぞれ逆方向とした磁界発生装置と光学系と
を少なくとも２組以」二用意し、前記記録媒体の所定の
領域に光を照射しながらそれぞれ別個に逆方向に磁界を
印加することで情報の消去および書き込みを記録円板を
回転しながら同時に行うようにしたことを特徴とする光
磁気ディヌク装置。There is a recording medium that records information using the magneto-optical effect.17
A magneto-optical disk device comprising: a recording disk that rotates; an optical system that irradiates a predetermined area of the recording medium; and a magnetic field generator that applies a magnetic field to a predetermined area of the medium; Prepare at least two sets of a magnetic field generating device and an optical system in which the directions of generation of the magnetic field are opposite to each other, and separate the magnetic field generating devices and optical systems separately while irradiating light onto a predetermined area of the recording medium. A magneto-optical Dinuk device characterized in that information is erased and written simultaneously while rotating a recording disk by applying a magnetic field in opposite directions.
JP23067782A 1982-12-25 1982-12-25 Photomagnetic disc device Pending JPS59117703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23067782A JPS59117703A (en) 1982-12-25 1982-12-25 Photomagnetic disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23067782A JPS59117703A (en) 1982-12-25 1982-12-25 Photomagnetic disc device

Publications (1)

Publication Number Publication Date
JPS59117703A true JPS59117703A (en) 1984-07-07

Family

ID=16911569

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23067782A Pending JPS59117703A (en) 1982-12-25 1982-12-25 Photomagnetic disc device

Country Status (1)

Country Link
JP (1) JPS59117703A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59217250A (en) * 1983-05-25 1984-12-07 Matsushita Electric Ind Co Ltd Recording, reproducing, and erasing device for photomagnetic disk
JPS61240453A (en) * 1985-04-17 1986-10-25 Matsushita Electric Ind Co Ltd Optical magnetic disk device
JPS62157348A (en) * 1985-12-28 1987-07-13 Nec Home Electronics Ltd Photomagnetic disk player
US4841502A (en) * 1985-06-14 1989-06-20 Kabushiki Kaisha Toshiba Information recording system and reproducing for recording and reproducing information on a magneto-optical disk
US5287334A (en) * 1989-07-29 1994-02-15 Sony Corporation Magneto-optical pickup apparatus and magneto-optical recording/reproducing apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55129909A (en) * 1979-03-22 1980-10-08 Olympus Optical Co Ltd Thermomagnetic recording and reproducing device
JPS57176505A (en) * 1981-04-23 1982-10-29 Olympus Optical Co Ltd Bias magnetic field applying system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55129909A (en) * 1979-03-22 1980-10-08 Olympus Optical Co Ltd Thermomagnetic recording and reproducing device
JPS57176505A (en) * 1981-04-23 1982-10-29 Olympus Optical Co Ltd Bias magnetic field applying system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59217250A (en) * 1983-05-25 1984-12-07 Matsushita Electric Ind Co Ltd Recording, reproducing, and erasing device for photomagnetic disk
JPH0520819B2 (en) * 1983-05-25 1993-03-22 Matsushita Electric Ind Co Ltd
JPS61240453A (en) * 1985-04-17 1986-10-25 Matsushita Electric Ind Co Ltd Optical magnetic disk device
US4841502A (en) * 1985-06-14 1989-06-20 Kabushiki Kaisha Toshiba Information recording system and reproducing for recording and reproducing information on a magneto-optical disk
JPS62157348A (en) * 1985-12-28 1987-07-13 Nec Home Electronics Ltd Photomagnetic disk player
US5287334A (en) * 1989-07-29 1994-02-15 Sony Corporation Magneto-optical pickup apparatus and magneto-optical recording/reproducing apparatus

Similar Documents

Publication Publication Date Title
JPH056590A (en) Magneto-optical recorder
US4495530A (en) Method of processing information signal with respect to opto-magnetic record medium
JPS59215008A (en) Optical magnetic disc device
JPS59117703A (en) Photomagnetic disc device
JPS5954003A (en) Thermomagnetic recorder
JPS61214256A (en) Photomagnetic disc device
US6212136B1 (en) Magneto-optical disc apparatus with means to change the angle and distance between a magnetic field generating source and a magneto-optical disc
JPS605404A (en) Opto-magnetic recording and reproducing system
JPS5938951A (en) Photomagnetic recording and reproducing device
JPS61242301A (en) Photomagnetic scan system
JPS61214265A (en) Photomagnetic recording and erasing system
JPS6013304A (en) Erasing device of optical/thermal/magnetic recording
JPS63113839A (en) Magneto-optical information recording and reproducing device
JP2604700B2 (en) Magneto-optical recording / reproduction / erasing method and apparatus
JPS61278059A (en) Photomagnetic recording/reproducing device
JPS6032148A (en) Photomagnetic recorder
JPS60212850A (en) Photomagnetic disk
JP2604702B2 (en) Magneto-optical recording / reproduction / erasing method and apparatus
JPH0679392B2 (en) Magneto-optical erasing method
JP2850326B2 (en) Magneto-optical disk initialization device
JPS6150235A (en) System and apparatus for erasing and reproducing optomagnetic recording
JPS60150202A (en) Reproduction method and its device
JPH06150423A (en) Magneto-optical recorder
JPH06325404A (en) Information memory device
JPS59142760A (en) Optical information recording device