JPH0349631U - - Google Patents
Info
- Publication number
- JPH0349631U JPH0349631U JP10947189U JP10947189U JPH0349631U JP H0349631 U JPH0349631 U JP H0349631U JP 10947189 U JP10947189 U JP 10947189U JP 10947189 U JP10947189 U JP 10947189U JP H0349631 U JPH0349631 U JP H0349631U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- optical disk
- magneto
- actuator
- laser beam
- 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
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
Description
第１図は本考案に係る光磁気デイスク装置の一
実施例を示す構成図、第２図はサーボ回路部分の
詳細を示す構成図、第３図は２次遅れフイルタの
詳細を示す構成図、第４図は磁界発生用コイル駆
動回路部分の詳細を示す構成図、第５図は記録膜
面での光デイスクの振れと磁界の強度の関係を示
す図、第６図は従来の磁界発生機構の一例を示す
図である。
１……光磁気デイスク、２……光ヘツド、３…
…磁界発生用コイル、４……サーボ回路、５……
磁界発生用コイル駆動回路。
FIG. 1 is a configuration diagram showing an embodiment of a magneto-optical disk device according to the present invention, FIG. 2 is a configuration diagram showing details of a servo circuit portion, and FIG. 3 is a configuration diagram showing details of a secondary delay filter. Figure 4 is a configuration diagram showing details of the magnetic field generation coil drive circuit part, Figure 5 is a diagram showing the relationship between the vibration of the optical disk on the recording film surface and the strength of the magnetic field, and Figure 6 is the conventional magnetic field generation mechanism. It is a figure showing an example. 1... magneto-optical disk, 2... optical head, 3...
...Magnetic field generation coil, 4... Servo circuit, 5...
Coil drive circuit for magnetic field generation.
Claims (1)
ーザ光を絞り込み、絞り込んだレーザ光により光
磁気デイスクに対して信号を書き込んだり読み出
したりすると共に、フオーカスサーボ用のエラー
信号を発生する機能を有する光ヘツドと、 光磁気デイスクの記録膜面に所定強度の磁界を
与えるための磁界発生用コイルと、 前記光磁気デイスクからのフオーカスエラー信
号が零になるように前記アクチユエータを駆動す
ると共に、アクチユエータに流れる電流を検出し
これにオフセツト値を加え、アクチユエータの特
性をシユミレートする２次遅れフイルタを介して
光磁気デイスクの振れに対応した補正信号を出力
するサーボ回路と、 磁界設定値と前器サーボ回路からの補正信号を
加算した信号により前記磁界発生コイルを駆動す
る磁界発生用コイル駆動回路とを具備し、光デイ
スクの振れに対する磁界変化が補正されるように
構成したことを特徴とする光磁気デイスク装置。[Claim for Utility Model Registration] An actuator moves the objective lens to focus the laser beam, and the focused laser beam writes and reads signals to and from the magneto-optical disk, and also generates an error signal for focus servo. an optical head having the function of At the same time, a servo circuit detects the current flowing through the actuator, adds an offset value to it, and outputs a correction signal corresponding to the vibration of the magneto-optical disk via a second-order delay filter that simulates the characteristics of the actuator, and a magnetic field setting value. and a magnetic field generating coil drive circuit that drives the magnetic field generating coil with a signal obtained by adding a correction signal from the former servo circuit, and is configured so that changes in the magnetic field due to shake of the optical disk are corrected. Magneto-optical disk device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10947189U JPH0349631U (en) | 1989-09-19 | 1989-09-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10947189U JPH0349631U (en) | 1989-09-19 | 1989-09-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0349631U true JPH0349631U (en) | 1991-05-15 |
Family
ID=31658067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10947189U Pending JPH0349631U (en) | 1989-09-19 | 1989-09-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0349631U (en) |
-
1989
- 1989-09-19 JP JP10947189U patent/JPH0349631U/ja active Pending
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