JPS6196540A - Photo-electro-magnetic recording and reproducing device - Google Patents
Photo-electro-magnetic recording and reproducing deviceInfo
- Publication number
- JPS6196540A JPS6196540A JP21894084A JP21894084A JPS6196540A JP S6196540 A JPS6196540 A JP S6196540A JP 21894084 A JP21894084 A JP 21894084A JP 21894084 A JP21894084 A JP 21894084A JP S6196540 A JPS6196540 A JP S6196540A
- Authority
- JP
- Japan
- Prior art keywords
- magneto
- objective lens
- pickup
- medium
- recording
- 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
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0927—Electromechanical actuators for lens positioning for focusing only
-
- 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
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
- G11B11/1056—Switching or mechanically reversing the magnetic field generator
-
- 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
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、高密度記録ができ、情報の書き換えが可能な
各槙情報機器に利用できる光磁気記録再生装置に関する
ものである、
〔従来技術〕
近年、高と変人容量記録ができ、かつ情報の書き換えが
可能であるという点で光磁気記録再生装置が注目されて
いる。これらのｉ置において、情報の再生は、カー（Ｋ
ｅｒｒ ）またはファラデー（Ｆａｒａｄａｙ ）効果
を用い、磁性暎での光の偏光面の回転変化を検光子で光
量変化に変換することに工り再生される、一方、記録お
工び消去は、微小領域をキュリ一温度や磁気補償温度以
上にレーザー光で照射前＠を行ない、その領域の磁化を
消失させ冷却時に発生する磁化を外部磁場に工す望みの
方向に向けることに工って行なわれる。この外部磁場の
印カロ方法について、回転可叱な長い棒磁石と光学ピッ
クアップを磁性１ＵＷ４に関して互いに反対側に位置す
る工うに配置し、記録・消去を行なう方法（特開昭５９
−５８９５１）が提案されている、
〔発明が解決しょうとする間頂点〕
（１）永久磁石の回転機構が必要であり、また回転を行
なう念めの空間も必要である。このため、磁石を磁性／
４１ｍＢから離れたところに位置させねばならず、強い
永久磁石を必要とする。ｔｅ両面記録媒体の場合、非記
録側の力がこの磁石に近いため、この面の記録情報ｔ−
消去してしまうｏＩ叱性がある。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magneto-optical recording/reproducing device that can perform high-density recording and can be used in various information devices capable of rewriting information. ] In recent years, magneto-optical recording and reproducing devices have attracted attention because they are capable of high-capacity recording and are capable of rewriting information. At these locations, the information is played back by the car (K).
err) or Faraday effect, and converts rotational changes in the plane of polarization of light caused by magnetic waves into changes in light intensity using an analyzer.On the other hand, recording and erasing are performed in minute areas. This is done by subjecting the area to a temperature above the Curie temperature or magnetic compensation temperature before irradiation with a laser beam to eliminate the magnetization in that area and directing the magnetization generated during cooling in the desired direction to be applied to the external magnetic field. Regarding this method of applying an external magnetic field, there is a method in which a rotatable long bar magnet and an optical pickup are placed on opposite sides of the magnetic field 1UW4, and recording and erasing is performed (JP-A-59
-58951) has been proposed. [Points to be solved by the invention] (1) A permanent magnet rotation mechanism is required, and a space for rotation is also required. For this reason, the magnet can be
It must be located away from 41 mB and requires a strong permanent magnet. In the case of a double-sided recording medium, the force on the non-recording side is close to this magnet, so the recorded information on this side is
There is a tendency to erase oI.
（２）光磁気記録媒体が、永久磁石と光♀ピックアップ
にはさまれたｍ造となっているため、この記録媒体の涜
脱が非常にやりに（＜、記録媒体の固定機構も作成しに
ぐい。(2) Because the magneto-optical recording medium is sandwiched between a permanent magnet and an optical pickup, it is very difficult to disassemble the recording medium (<, it is also difficult to create a fixing mechanism for the recording medium). .
本発明は、この工うな問題点を）１１！決するためのも
ので、その目的とするところは、記録媒体の片側からだ
けで記録・消去ができる光磁場ピックアップを用いた光
磁気記録再生装置を提供することにある。The present invention solves this problem) 11! Its purpose is to provide a magneto-optical recording and reproducing apparatus using a magneto-optical pickup that can record and erase information from only one side of a recording medium.
本発明の光磁気記録再生装置は、光線を光磁気式記録媒
体に集光させる対物レンズと前記対物レンズを支持する
対物レンズホルダー、お工ひ、前記対物レンズと前記対
物レンズホルダーを光軸方向へ移動させるフォーカスア
クチュエーター用コイルとこれらを保護するカバーから
なる光磁気ピックアップに２いて、前記対物レンズホル
ダーを永久磁石で作成し、一方の面が前記光磁気式記録
媒体に記録・消去を行なう際の外部磁場を供舖しもう一
方の面がＫｔＪｔ４己フォーカフオーカスアクチュエー
ター用コイル路ｔ−構成するｆ、−ｆニジて、前記対物
レンズホルダーを構成する永久磁石の極性が互いに異な
る２つの光磁気ピックアップを用い、一方のピックアッ
プで記録、もう一方のピックアップで消去全行なうこと
を特徴とする、
〔実ＩＭ例〕
以下、本発明について実施例に基づき詳細に説明する。The magneto-optical recording and reproducing apparatus of the present invention includes an objective lens for condensing a light beam onto a magneto-optical recording medium, an objective lens holder for supporting the objective lens, and a structure for moving the objective lens and the objective lens holder in the optical axis direction. The objective lens holder is made of a permanent magnet, and one surface is used for recording and erasing data on the magneto-optical recording medium. The other surface provides an external magnetic field of KtJt4, and the other side constitutes the focus actuator coil path t-f, -f. [Actual IM Example] The present invention will be described in detail below based on an embodiment.
第１図に本発明による光磁気ピックアップの一部分を示
す。第１図において、１１は光磁気式記録媒体、１２ｉ
ｊ光線１６′に１１上に微小スポットに絞り込むための
対物レンズ、１５は前記対物し／ズを支持するホルタ“
−で、このホルダーは永久磁石からできており１例えば
上面がＮ樟、下面がＳ極に帝値しである。、１４は光線
１６が記録媒体１１上に焦点を結ぶ二うに、１２と１５
ｉ光軸方向に移動させるためのフォーカスアクチュエー
ター用コイルである。対物レンズホルダー１５を構成し
ている永久磁石において、上面が情報の記録・消去のた
めの外部磁場印加用に、下面がフォーカスアクチュエー
ター用コイルとｉ気回路を構成して、対物レンズ全上下
に移動させる、第２ ｌ閃は、巣１図に示された光磁気
ピックアップを用いた光磁気記録再生装置の一例である
。２１は対物レンズホルダー１５の上面がＮ４−１同じ
く２２はＳ極となっている光磁気ピックアップである。FIG. 1 shows a portion of a magneto-optical pickup according to the present invention. In FIG. 1, 11 is a magneto-optical recording medium, 12i
j an objective lens for narrowing down the light beam 16' to a minute spot on 11; 15 is a holter for supporting the objective lens;
-, this holder is made of a permanent magnet, and for example, the upper surface is made of N-pole and the lower surface is made of S-pole. , 14 are 12 and 15 just as the light ray 16 is focused on the recording medium 11.
This is a focus actuator coil for moving in the i-optical axis direction. In the permanent magnet that constitutes the objective lens holder 15, the upper surface is used to apply an external magnetic field for recording and erasing information, and the lower surface forms an i-circuit with a focus actuator coil, which moves the objective lens completely up and down. The second flash is an example of a magneto-optical recording and reproducing device using the magneto-optical pickup shown in Figure 1. 21 is a magneto-optical pickup in which the upper surface of the objective lens holder 15 is the same as N4-1, and 22 is an S pole.
例えば、２１を記録用として用いる場合、２２は消去も
しくは再生用になる、光磁気式記録媒体１１の初期磁化
状態に工っては、２１と２２の役割が逆転することは言
うまでもない。このＬうな構成を用いると、２１のピッ
クアップで再生を行ない記録が正しく行なわれたかどう
か確認できる。あるいは、２２のピックアップで媒体の
欠陥等を１リチエツクし、不良でないＳ甘めみ、２１の
ピックアップで記録ヲ行なうということができる。また
、２２のピックアップで消去した直後、２１のピックア
ップで記録するということもできる。For example, when 21 is used for recording, 22 is used for erasing or reproducing.It goes without saying that the roles of 21 and 22 are reversed when the initial magnetization state of the magneto-optical recording medium 11 is modified. If this L-shaped configuration is used, it is possible to perform playback using the pickup No. 21 and check whether recording has been performed correctly. Alternatively, it is possible to use the pick-up number 22 to check for defects in the medium, and then use the pick-up number 21 to perform recording if there is no defect. Further, immediately after erasing with the pickup 22, recording can be performed with the pickup 21.
以上述べた工うに本発明によれば、記録・消去のための
外部Ｓ場印加用永久磁石が光磁・スビックアップ側にあ
るため、光磁気式記録媒体の酒税が容易である。そして
、この永久磁石は記録媒体に近い位置にあるため、弱い
磁石で十分である、その上、通常はフォーカスサーボが
かけられて、記録媒体と対物レンズとの距離が一定であ
るため、記＠媒体上での磁場が一足に保たれることにな
り、必要最低限の磁場でよいことになる。さらに、第１
図の実Ｓｉ 夕１１のようにフォーカスアクチュエータ
ーと兼用できるため、装置が小型化できるという利点ｆ
！：有する。また、第２図の実癩例における工うに、記
録直後再生、消去直後配縁ということが行なえるため、
記録・再生・消去という動作に要する時間が全体として
短くなるという効果も有する。 ・As described above, according to the present invention, since the permanent magnet for applying an external S field for recording and erasing is located on the magneto-optical/subic up side, it is easy to tax the magneto-optical recording medium. Since this permanent magnet is located close to the recording medium, a weak magnet is sufficient. Moreover, since focus servo is usually applied and the distance between the recording medium and the objective lens is constant, The magnetic field on the medium is maintained at a constant level, and the minimum required magnetic field is sufficient. Furthermore, the first
The advantage is that the device can be made smaller because it can also be used as a focus actuator, as shown in Fig.11.
! :Have. Furthermore, as in the case of the leprosy example shown in Fig. 2, reproduction can be performed immediately after recording, and reproduction can be performed immediately after erasing.
Another effect is that the time required for recording, reproducing, and erasing operations is shortened overall.・
第１１メ１は本発明に用いる光磁気ピックアップの要部
構５Ｍ図、駆２図は本発明による光磁気配４再生装置の
要部構成図。
１１・・・ｆ、磁気式記録媒体
１２・・・対、Ｉ勿しンズ
１３・・・対４勿レンズホルダー
１４・・・フォーカスアクチュエーター用コイル１５・
・・保護カバー
１６・・・光線
２１−２２．１、光磁気ピックアップ
以 上Fig. 11 is a 5M diagram showing the main part of the magneto-optical pickup used in the present invention, and Fig. 2 is a diagram showing the main part of the magneto-optical pickup according to the invention. 11...f, magnetic recording medium 12...pair, I lens 13...pair 4 lens holder 14...focus actuator coil 15.
...Protective cover 16...Light beams 21-22.1, magneto-optical pickup and above
Claims (2)
と前記対物レンズを支持する対物レンズホルダー、およ
び、前記対物レンズと前記対物レンズホルダーを光軸方
向へ移動させるフォーカスアクチュエーター用コイルと
これらを保護するカバーからなる光磁気ピックアップに
おいて、前記対物レンズホルダーを永久磁石で作成し、
一方の面が前記光磁気式記録媒体に記録および消去を行
なう際の外部磁場を供給し、もう一方の面が前記フォー
カスアクチュエーター用コイルと磁気回路を構成する光
磁気ピックアップを用いることを特徴とする光磁気記録
再生装置。(1) An objective lens that focuses light on a magneto-optical recording medium, an objective lens holder that supports the objective lens, and a coil for a focus actuator that moves the objective lens and the objective lens holder in the optical axis direction. In a magneto-optical pickup consisting of a cover that protects the objective lens holder, the objective lens holder is made of a permanent magnet,
A magneto-optical pickup is used, one surface of which supplies an external magnetic field for recording and erasing on the magneto-optical recording medium, and the other surface forming a magnetic circuit with the focus actuator coil. Magneto-optical recording and reproducing device.
ズホルダーを構成する永久磁石の極性が互いに異なる２
つのピックアップを用い、一方のピックアップで記録、
もう一方のピックアップで消去を行なうことを特徴とす
る特許請求の範囲第１項記載の光磁気記録再生装置。(2) In the magneto-optical pickup, the permanent magnets forming the objective lens holder have mutually different polarities.
record with one pickup,
2. The magneto-optical recording and reproducing apparatus according to claim 1, wherein the other pickup performs erasing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21894084A JPS6196540A (en) | 1984-10-18 | 1984-10-18 | Photo-electro-magnetic recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21894084A JPS6196540A (en) | 1984-10-18 | 1984-10-18 | Photo-electro-magnetic recording and reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6196540A true JPS6196540A (en) | 1986-05-15 |
| JPH0580059B2 JPH0580059B2 (en) | 1993-11-05 |
Family
ID=16727710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21894084A Granted JPS6196540A (en) | 1984-10-18 | 1984-10-18 | Photo-electro-magnetic recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6196540A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4914643A (en) * | 1986-11-20 | 1990-04-03 | Ricoh Company, Ltd. | Overwriting photomagnetic recording apparatus having single light source and fixed-field generator |
| WO1990003643A1 (en) * | 1988-09-20 | 1990-04-05 | Hewlett-Packard Company | Bias field switching system for magneto-optic disk drive |
| US4928192A (en) * | 1987-12-23 | 1990-05-22 | Konica Corporation | Process for identifying disks and automatically configuring a disk drive system |
| US4959820A (en) * | 1986-04-22 | 1990-09-25 | Sony Corporation | Magnetooptical recording apparatus with constant leakage magnetic and pulse modulated magnetic field |
| US4984226A (en) * | 1986-07-28 | 1991-01-08 | Kabushiki Kaisha Toshiba | Magnetoptic head for recording/erasing information using a cylindrical hollow permanent magnet |
| US4993009A (en) * | 1986-07-14 | 1991-02-12 | Canon Kabushiki Kaisha | Opto-magnetic recording apparatus with a bias magnetic field generating means movable parallel to a recording surface of a recording medium |
| US5216643A (en) * | 1988-09-20 | 1993-06-01 | Hewlett-Packard Company | Rotary arm and optical head for a magneto-optic disk drive |
| US5345431A (en) * | 1992-09-14 | 1994-09-06 | Hewlett-Packard Company | Write and erase assembly for magneto-optic drive apparatus |
-
1984
- 1984-10-18 JP JP21894084A patent/JPS6196540A/en active Granted
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4959820A (en) * | 1986-04-22 | 1990-09-25 | Sony Corporation | Magnetooptical recording apparatus with constant leakage magnetic and pulse modulated magnetic field |
| US4993009A (en) * | 1986-07-14 | 1991-02-12 | Canon Kabushiki Kaisha | Opto-magnetic recording apparatus with a bias magnetic field generating means movable parallel to a recording surface of a recording medium |
| US4984226A (en) * | 1986-07-28 | 1991-01-08 | Kabushiki Kaisha Toshiba | Magnetoptic head for recording/erasing information using a cylindrical hollow permanent magnet |
| US4914643A (en) * | 1986-11-20 | 1990-04-03 | Ricoh Company, Ltd. | Overwriting photomagnetic recording apparatus having single light source and fixed-field generator |
| US4928192A (en) * | 1987-12-23 | 1990-05-22 | Konica Corporation | Process for identifying disks and automatically configuring a disk drive system |
| WO1990003643A1 (en) * | 1988-09-20 | 1990-04-05 | Hewlett-Packard Company | Bias field switching system for magneto-optic disk drive |
| US4977549A (en) * | 1988-09-20 | 1990-12-11 | Hewlett-Packard Company | Write and erase magnetic bias field switching system for a magneto-optic disk drive |
| US5216643A (en) * | 1988-09-20 | 1993-06-01 | Hewlett-Packard Company | Rotary arm and optical head for a magneto-optic disk drive |
| US5345431A (en) * | 1992-09-14 | 1994-09-06 | Hewlett-Packard Company | Write and erase assembly for magneto-optic drive apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0580059B2 (en) | 1993-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |