JPS63291201A - Magneto-optical disk device - Google Patents

Magneto-optical disk device

Info

Publication number
JPS63291201A
JPS63291201A JP12365087A JP12365087A JPS63291201A JP S63291201 A JPS63291201 A JP S63291201A JP 12365087 A JP12365087 A JP 12365087A JP 12365087 A JP12365087 A JP 12365087A JP S63291201 A JPS63291201 A JP S63291201A
Authority
JP
Japan
Prior art keywords
recording medium
information recording
magnetic field
magneto
optical disk
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.)
Granted
Application number
JP12365087A
Other languages
Japanese (ja)
Other versions
JP2635045B2 (en
Inventor
Keiji Nakamura
恵司 中村
Nobuo Takeshita
伸夫 竹下
Kenjiro Kime
健治朗 木目
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP62123650A priority Critical patent/JP2635045B2/en
Publication of JPS63291201A publication Critical patent/JPS63291201A/en
Application granted granted Critical
Publication of JP2635045B2 publication Critical patent/JP2635045B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To sufficiently generate magnetic fields inverted at intervals of several hundred mum, by arranging two bipolar magnetic field generating devices from a center to an outer periphery so as to sandwich an information recording medium. CONSTITUTION:First and second magnetic field generating devices 21 and 22 of cross-sectional U-shape are formed with magnetic materials 23 and 24 and permanent magnets 25a, 25b, 26a and 26b, respectively, and are arranged so as to sandwich the information recording medium 1. The polarity of the permanent magnets 25a and 26a are different from those of the 25b and 26b, and also, the polarity of the permanent magnets 25a and 25b are different from those of the 26a and 26b. Also, the first and second magnetic field generating devices are arranged extending from the center of the information recording medium 1 to its outer periphery so as to cross the groove of the information recording medium 1. In such a way, it is possible to generate the magnetic field inverted at a distance within the several hundred mum in a direction perpendicular to a magnetic film.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、光磁気ディスク記録装量もしくは記録再生
装置のような記録消去機能を有する光磁気ディスク装置
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 device having a recording/erasing function, such as a magneto-optical disk recording capacity or a recording/reproducing device.

〔従来の技術〕[Conventional technology]

第５図は従来の光磁気ディスク装置であり、情報記録媒
体（１）を挾んで配設された光ヘッド（２）と、情報の
記録あるいは消去時に情報記録媒体（１）に磁界を印加
する磁界発生装！（３）とからなっている。Figure 5 shows a conventional magneto-optical disk device, in which an optical head (2) is arranged to sandwich an information recording medium (1), and a magnetic field is applied to the information recording medium (1) when recording or erasing information. Magnetic field generator! It consists of (3).

光ヘッド（２）は情報記録媒体（１）に光線を集光させ
る集光レンズ（４）およびこの集光レンズ（４）を所望
の方向、すなわち、情報記録媒体（１）Ｋ対して垂直な
焦点方向、情報記録媒体（１）の溝を横断するトラッキ
ング方向に駆動する集光レンズ駆動装置とからなつてい
る。集光レンズ駆動装置としては種々の形式のものがあ
るが、いずれも各方向における光スポットのずれを光検
知器によって検知し、集光レンズ（４）を前記ずれをな
くす方向に変位させるようになっている・。また光ヘッ
ド（２）は情報記録媒体（１）の所望の位置にアクセス
するために情報記録媒体（１）の径方向に適宜の駆動手
段により移動させる。The optical head (2) includes a condensing lens (4) that condenses a light beam onto the information recording medium (1), and a condensing lens (4) that directs the condensing lens (4) in a desired direction, that is, perpendicular to the information recording medium (1) K. It consists of a condensing lens drive device that drives in the focal direction and in the tracking direction that traverses the groove of the information recording medium (1). There are various types of condensing lens driving devices, but all of them are designed to detect the shift of the light spot in each direction using a photodetector and displace the condenser lens (4) in a direction that eliminates the shift. It's happening. Further, the optical head (2) is moved in the radial direction of the information recording medium (1) by an appropriate driving means in order to access a desired position on the information recording medium (1).

磁界発生装置（３）は、磁性材（５）と永久磁石（６ａ
）＋（６ｂ）により形成されており、情報記録媒体（１
）に磁界を印加するものである。The magnetic field generator (3) includes a magnetic material (5) and a permanent magnet (6a
)+(6b), and the information recording medium (1
) to apply a magnetic field.

以上の構成により、集光レンズ（４）に入射した２本の
光線（７ａ）、（７ｂ）はそれぞれ情報記録媒体（１）
に集光され、この集光した部分だけ情報記録媒体（１）
中の磁性膜の温度を上昇させその部分の保磁力を低下さ
せる。一方、磁界発生装ｆｆ（３）より発生する磁界は
磁路（８）に示すような経路をとり、集光点（９ａ）で
は（斜め）下向き、集光点（９ｂ）では（斜め）上向き
の磁界を印加する。したがって。With the above configuration, the two light beams (7a) and (7b) incident on the condensing lens (4) are transmitted to the information recording medium (1), respectively.
The light is focused on the information recording medium (1).
It raises the temperature of the magnetic film inside and lowers the coercive force of that part. On the other hand, the magnetic field generated by the magnetic field generator ff (3) follows a path as shown in the magnetic path (8), pointing downward (diagonally) at the focal point (9a) and upward (diagonally) at the focal point (9b). Apply a magnetic field of therefore.

集光点（９ａ）では下向き、集光点（９ｂ）では上向き
に磁化極性が反転され、一方で消去、もう一方で記録と
、同時消去・記録が行われろ。The magnetization polarity is reversed downward at the focal point (9a) and upward at the focal point (9b), and simultaneous erasing and recording are performed, with erasing on one side and recording on the other.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従来の光磁気ディスク装置は以上のように構成されてお
り、情報記録媒体中での２つの集光点は数百μ風以内に
位置ｔしている。ところが、従来の磁界発生装置より発
生する磁界の磁性膜に対する垂直方向の成分は、２つの
集光点付近では非常に小さく、記録−消去に必要な磁界
を印加することが困難であるという問題点があった。A conventional magneto-optical disk device is constructed as described above, and the two focal points in the information recording medium are located within several hundred micrometers. However, the component of the magnetic field generated by conventional magnetic field generators in the direction perpendicular to the magnetic film is very small near the two focal points, making it difficult to apply the magnetic field necessary for recording and erasing. was there.

この発明は上記のような間湖点を解消するためになされ
たもので、数百μｍ以内の距離で、磁性膜に対して垂直
な方向で反転した磁界を、記録・消去を行うのに充分な
だけ発生する磁界発生装置を具備した光磁気ディスク装
器を得ることを目的とする。This invention was made to eliminate the above-mentioned gap, and the magnetic field reversed in the direction perpendicular to the magnetic film at a distance of several hundred μm is sufficient to record and erase. An object of the present invention is to obtain a magneto-optical disk device equipped with a magnetic field generating device that generates as much as possible.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係る光磁気ディスク装置は、情報記録媒体を
挾むように上下に２極並置の磁界発生装置を配置し、デ
ィスクを挾んで対向する極どうしは互いに異極となって
いる。A magneto-optical disk device according to the present invention has magnetic field generating devices arranged vertically with two poles arranged side by side so as to sandwich an information recording medium, and the poles facing each other with the disk sandwiched therebetween are different in polarity from each other.

〔作　用〕[For production]

この発明においては、数百μ愚°′以内の距離で磁性膜
に対して垂直な方向で反転した磁界を発生する。In this invention, a magnetic field is generated that is reversed in the direction perpendicular to the magnetic film within a distance of several hundred micrometers.

〔実施例〕〔Example〕

第１図はこの発明の一実施例を示し、図において、断面
Ｕ字形の第１．第２の磁界発生装置ｆ（２１）。FIG. 1 shows an embodiment of the present invention, and in the figure, a first . Second magnetic field generator f(21).

（２２）は、それぞれ磁性材（２３’）、（２４）およ
び永久磁石（２５ａ）、（２５ｂ）と（２６ａ）　、（
２６ｂ）により形成されており、情報記録媒体（１）を
挾むように配置されている。永久磁石（２５ａ）と（２
５ｂ）および（２６ａ）と（２６ｂ）は互いに異極にな
っており、また、永久磁石（２５ａ）と（２６ａ）　、
（２５ｂ）と（２６ｂ）もそれぞれ互いに異極になって
いる。また、第１゜第２の磁界発生装置（２１Ｌ（２２
）は、情報記録媒体（１）の溝を横断するように、情報
記録媒体（１）の中心から外周にわたって配置されてい
る。(22) are magnetic materials (23'), (24) and permanent magnets (25a), (25b), (26a), (
26b), and is arranged so as to sandwich the information recording medium (1). Permanent magnet (25a) and (2
5b), (26a) and (26b) have different polarities, and permanent magnets (25a) and (26a),
(25b) and (26b) also have different polarities. In addition, the first and second magnetic field generators (21L (22
) are arranged from the center to the outer periphery of the information recording medium (1) so as to cross the groove of the information recording medium (1).

その他、第５図におけると同一符号は同一部分である。In addition, the same reference numerals as in FIG. 5 indicate the same parts.

次に動作について、第２図を用いて説明する。Next, the operation will be explained using FIG. 2.

＠１．第２の磁界発生装置（２１）、（２２）より発生
する磁界は、磁路（２７ａ　）＋　（２７ｂ　）を形成
する。@1. The magnetic fields generated by the second magnetic field generators (21) and (22) form a magnetic path (27a)+(27b).

したがって、数百μｍの間隔で磁性膜に対して垂直な磁
界が互いに反転しており、２つの光線を集光することに
より同時に消去・記録ができる。Therefore, the magnetic fields perpendicular to the magnetic film are reversed at intervals of several hundred μm, and erasing and recording can be performed simultaneously by converging two light beams.

なお、上記実施例では第１．第２の磁界発生装置（２１
）、（２２）を情報記録媒体（１）の中心から外周まで
分布するように配置したが、第２の磁界発生装置１ｔ（
２２）Ｋ代えて、第３図に示すよう１（２永久磁石（３
１ａ　＞　＃　（３１ｂ　）を光ヘット責２）の両側壁
に取付け、光ヘッド（２）と一体に移動するような１１
１５２としてもよい。Note that in the above embodiment, the first. Second magnetic field generator (21
), (22) are arranged so as to be distributed from the center to the outer periphery of the information recording medium (1), but the second magnetic field generator 1t (
22) Instead of K, use 1 (2) permanent magnet (3) as shown in Figure 3.
1a ># (31b) are attached to both side walls of the optical head (2), and a
It may be set to 152.

第４図は他の実施例を示す。永久磁石（３２ａ）。FIG. 4 shows another embodiment. Permanent magnet (32a).

（３２ｂ）は情報記録媒体（１）の中心から外周まで溝
を横切るように設置されている。介ヘッド（２）にはコ
イル（３３ａ）、（３３ｂ）が設置されており、このコ
イルは第１の磁界発生装置（２１）および永久磁石（３
２ａ）、（３２ｂ）により作られる磁路（２７ａ）。(32b) is installed so as to cross the groove from the center to the outer periphery of the information recording medium (1). Coils (33a) and (33b) are installed on the intermediate head (2), and these coils are connected to the first magnetic field generator (21) and the permanent magnet (3).
A magnetic path (27a) created by 2a) and (32b).

（２７ｂ）中に配置されている。(27b).

以上の構成により、コイル（３３ａ）、（３３ｂ）に胃
流を印加すると、電磁力により光ヘッド（２）を情報記
録媒体（１）■径方向に移動し、所望の位置にアクセス
することが可能となる。情報記録媒体（１）中の２つの
光線集光部（９ａ）、（９ｂ）に反転した磁界を発生さ
せるという作用は、先の実施例と全く同じである。With the above configuration, when gastric flow is applied to the coils (33a) and (33b), the optical head (2) can be moved in the radial direction of the information recording medium (1) by electromagnetic force to access the desired position. It becomes possible. The effect of generating reversed magnetic fields in the two light beam condensing parts (9a) and (9b) in the information recording medium (1) is exactly the same as in the previous embodiment.

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によれば、２極形成の磁界発生
装置を２個情報記録媒体を挾むように中心から外周まで
設置したので、非常に簡単な構造で数百μｍの間隔で反
転した磁界を充分に発生させることができ、同時消去・
記録を容易に行うことができる効果がある。As described above, according to the present invention, since two bipolar magnetic field generators are installed from the center to the outer periphery so as to sandwich the information recording medium, a magnetic field that is reversed at intervals of several hundred μm can be generated with a very simple structure. can be generated sufficiently, simultaneously erasing and
This has the effect of making recording easier.

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの発明の一実施例の要部斜視図、第２図は同
じく正断面図、第３図は他の実施例の斜視図、第４図は
さらに他の実施例の正断面図、第５図は従来の光磁気デ
ィスク装置の正断面図である。 （１）・・情報記録媒体、（２）・・光ヘッド、（４）
・・集光レンズ、（２１）、（２２）・・第１．第２の
磁界発生装置、（２１）、（２４）・・磁性材、（２５
ａ）。 （２５ｂＬ（２６ａＬ（２６ｂ）、・（−３１ａ）、（
３１ｂ）。 （３２ａＬ（３２ｂ）＠”永久磁石、（３３ａ）　、　
（３３ｂ）・・コイル。 なお、各図中、同一符号は同一または相当部分を示す。 尾１図 １　：　惰＠記俳蝶停 ２　：　尤へ、・、ド ４　：　１１九し２ス゛ ２１．２２　　：　　第１．甘２の橿界発生袈１２３．
２４：　　虫住材 ２５ａ　、　２５ｂ　、　２６ａ　、２６ｂ　　　永ｚ
總石昂３図 ３１０．３１ｂ　　：　永久臘石 ３２’ａ、３２ｂ　：　永Ｒｉｎｋ石 ３３ａ、３３ｂ　　：　　フィル 手続補正書 昭和６２ｑ、１０月２８日FIG. 1 is a perspective view of essential parts of one embodiment of the invention, FIG. 2 is a front sectional view, FIG. 3 is a perspective view of another embodiment, and FIG. 4 is a front sectional view of still another embodiment. , FIG. 5 is a front sectional view of a conventional magneto-optical disk device. (1) Information recording medium, (2) Optical head, (4)
...Condensing lens, (21), (22)...1st. Second magnetic field generator, (21), (24)...Magnetic material, (25
a). (25bL(26aL(26b), ・(-31a), (
31b). (32aL(32b)@”Permanent magnet, (33a),
(33b)...Coil. In each figure, the same reference numerals indicate the same or corresponding parts. Tail 1 Figure 1: Inasu@Kihaichostop 2: To,..., Do 4: 119 2 ゛21.22: 1st. Ama 2's Kashikai Genkei 123.
24: Insect housing materials 25a, 25b, 26a, 26b Ei-z
Soishi Kou 3 Figure 310.31b: Permanent link stone 32'a, 32b: Eternal link stone 33a, 33b: Fill procedure amendment 1988, October 28th

Claims (4)

【特許請求の範囲】[Claims] （１）情報記録媒体に複数の光スポットを当てる集光レ
ンズと、前記集光レンズを必要な方向に変位させる集光
レンズ駆動装置と、前記情報記録媒体の所望の位置に光
ヘッドを移動させる光ヘッド駆動装置と、情報の記録消
去時に前記光スポットに磁界を印加する磁界発生装置と
を備えた光磁気ディスク装置において、対向する極が互
いに異極性をなす２極並置の第１、第２の前記磁界発生
装置を、前記情報記録媒体を挾むように両側に、前記情
報記録媒体の溝を横切るように少なくとも半径の長さ以
上の長さをもつように配設されていることを特徴とする
光磁気ディスク装置。(1) A condensing lens that directs a plurality of light spots onto an information recording medium, a condensing lens driving device that displaces the condensing lens in a required direction, and an optical head that moves the optical head to a desired position on the information recording medium. In a magneto-optical disk device comprising an optical head drive device and a magnetic field generation device that applies a magnetic field to the optical spot when recording and erasing information, first and second two poles are juxtaposed with opposing poles having different polarities. The magnetic field generating devices are disposed on both sides of the information recording medium so as to sandwich the information recording medium, and have a length at least equal to the radius of the information recording medium so as to cross the groove of the information recording medium. Magneto-optical disk device. （２）第１、第２の磁界発生装置のうちの一方が前記光
ヘッドと一体に移動する特許請求の範囲第１項記載の光
磁気ディスク装置。(2) The magneto-optical disk device according to claim 1, wherein one of the first and second magnetic field generating devices moves together with the optical head. （３）磁界発生装置が複数個の永久磁石及び磁性材によ
り形成されている特許請求の範囲第１項記載の光磁気デ
ィスク装置。(3) A magneto-optical disk device according to claim 1, wherein the magnetic field generating device is formed of a plurality of permanent magnets and a magnetic material. （４）光ヘッドに設置されたコイルが磁界発生装置と情
報記録媒体の間に配置されている特許請求の範囲第１項
記載の光磁気ディスク装置。(4) The magneto-optical disk device according to claim 1, wherein the coil installed in the optical head is arranged between the magnetic field generator and the information recording medium.
JP62123650A 1987-05-22 1987-05-22 Magneto-optical disk device Expired - Fee Related JP2635045B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62123650A JP2635045B2 (en) 1987-05-22 1987-05-22 Magneto-optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62123650A JP2635045B2 (en) 1987-05-22 1987-05-22 Magneto-optical disk device

Publications (2)

Publication Number Publication Date
JPS63291201A true JPS63291201A (en) 1988-11-29
JP2635045B2 JP2635045B2 (en) 1997-07-30

Family

ID=14865855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62123650A Expired - Fee Related JP2635045B2 (en) 1987-05-22 1987-05-22 Magneto-optical disk device

Country Status (1)

Country Link
JP (1) JP2635045B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61196446A (en) * 1985-02-26 1986-08-30 Sony Corp Photomagnetic recording device
JPS61284801A (en) * 1985-06-10 1986-12-15 Matsushita Electric Ind Co Ltd Photomagnetic recording and reproducing device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61196446A (en) * 1985-02-26 1986-08-30 Sony Corp Photomagnetic recording device
JPS61284801A (en) * 1985-06-10 1986-12-15 Matsushita Electric Ind Co Ltd Photomagnetic recording and reproducing device

Also Published As

Publication number Publication date
JP2635045B2 (en) 1997-07-30

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