JPH03110637U - - Google Patents
Info
- Publication number
- JPH03110637U JPH03110637U JP1838390U JP1838390U JPH03110637U JP H03110637 U JPH03110637 U JP H03110637U JP 1838390 U JP1838390 U JP 1838390U JP 1838390 U JP1838390 U JP 1838390U JP H03110637 U JPH03110637 U JP H03110637U
- Authority
- JP
- Japan
- Prior art keywords
- light beam
- magneto
- optical disk
- magnetic field
- irradiating
- 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
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Description
第１図は本考案の一実施例を示す構成概要図、
第２図ａ，ｂ，ｃはデータ消去及び書き込み動作
の説明図であつて第２図ａは既にデータが書き込
まれた光磁気デイスクの磁気状態を示す図、第２
図ｂは消去動作中の光磁気デイスクの磁気状態を
示す図、第２図ｃは書き込時の状態を示す図であ
る。
１……スピンドル・モータ、２……回転軸、３
……光磁気デイスク、４……回転エンコーダ、５
……光ヘツド、６……電磁石コイル、７……ＬＤ
駆動回路、８……電磁石駆動回路、９，１０……
デジタル・アナログ変換回路、１１……フオトデ
イテクタ、１２……パワーアンプ、１３……基準
周波数発生回路、１４……比較回路。
FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention;
Figures 2a, b, and c are explanatory diagrams of data erasing and writing operations, and Figure 2a is a diagram showing the magnetic state of a magneto-optical disk on which data has already been written.
FIG. 2b is a diagram showing the magnetic state of the magneto-optical disk during an erasing operation, and FIG. 2c is a diagram showing the state during writing. 1... Spindle motor, 2... Rotating shaft, 3
...Magneto-optical disk, 4...Rotary encoder, 5
...Optical head, 6...Electromagnetic coil, 7...LD
Drive circuit, 8... Electromagnet drive circuit, 9, 10...
Digital-to-analog conversion circuit, 11...photodetector, 12...power amplifier, 13...reference frequency generation circuit, 14...comparison circuit.
Claims (1)
により磁気方向を変化させて情報の書き込みを行
ない、またこの磁気方向の変化を光ビームを照射
することによつて検出し情報の再生を行なう光磁
気デイスクのドライブ装置において、 前記光磁気デイスクを回転するスピンドル・モ
ータの回転速度を制御する手段と、データ消去時
の光ビーム量を二段階以上切り替える光ビーム駆
動手段と、データ消去時に照射する磁界強度を二
段階以上切り替える磁界発生手段とを具え、光磁
気デイスクの連続消去時に、書き込み再生時より
も高速に前記スピンドル・モータを回転させると
共に、照射する光ビーム量と磁界強度をスピンド
ル・モータの回転速度に比例して大きくすること
によつて、デイスクの初期化またはデータ消去を
高速に行なうようにしたことを特徴とする光磁気
デイスクドライブ装置。[Claim for Utility Model Registration] Information is written by changing the magnetic direction by irradiating a light beam and irradiating a magnetic field based on data, and this change in magnetic direction is detected by irradiating the light beam. A magneto-optical disk drive device for reproducing information includes means for controlling the rotational speed of a spindle motor that rotates the magneto-optical disk, and a light beam driving means for switching the amount of light beam in two or more stages during data erasing. , comprising a magnetic field generation means for switching the intensity of the magnetic field irradiated in two or more stages during data erasing, and rotating the spindle motor at a higher speed than during writing and reproducing during continuous erasing of the magneto-optical disk, and adjusting the amount of the irradiated light beam. 1. A magneto-optical disk drive device characterized in that disk initialization or data erasure is performed at high speed by increasing magnetic field strength in proportion to the rotational speed of a spindle motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1838390U JPH03110637U (en) | 1990-02-26 | 1990-02-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1838390U JPH03110637U (en) | 1990-02-26 | 1990-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03110637U true JPH03110637U (en) | 1991-11-13 |
Family
ID=31521544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1838390U Pending JPH03110637U (en) | 1990-02-26 | 1990-02-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03110637U (en) |
-
1990
- 1990-02-26 JP JP1838390U patent/JPH03110637U/ja active Pending
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