JPS61149113U - - Google Patents
Info
- Publication number
- JPS61149113U JPS61149113U JP3110285U JP3110285U JPS61149113U JP S61149113 U JPS61149113 U JP S61149113U JP 3110285 U JP3110285 U JP 3110285U JP 3110285 U JP3110285 U JP 3110285U JP S61149113 U JPS61149113 U JP S61149113U
- Authority
- JP
- Japan
- Prior art keywords
- light receiving
- receiving member
- filter
- output
- low frequency
- 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
- 239000000725 suspension Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
Description
第１図は本考案によるサーボゲイン制御装置を
示す回路構成図、第２図は従来の光学式ピツクア
ツプのサーボ装置の回路構成図、第３図はサスペ
ンシヨンの振動伝達特性を示す線図、第４図はア
クチユエータのサーボ特性を示す線図である。
１……デイスク（記録媒体）、３……光学式ピ
ツクアツプの読取りヘツド、３ａ……対物レンズ
、３ｂ……発光部材、３ｄ……受光部材、４……
アクチユエータ、５……サスペンシヨン、１１…
…プリアンプ、１３……サーボアンプ、１５……
フイルタ、１６……サーボゲイン制御回路。
FIG. 1 is a circuit diagram showing a servo gain control device according to the present invention, FIG. 2 is a circuit diagram of a conventional optical pickup servo device, and FIG. 3 is a diagram showing the vibration transmission characteristics of the suspension. FIG. 4 is a diagram showing the servo characteristics of the actuator. DESCRIPTION OF SYMBOLS 1... Disk (recording medium), 3... Reading head of optical pickup, 3a... Objective lens, 3b... Light emitting member, 3d... Light receiving member, 4...
Actuator, 5... Suspension, 11...
...Preamplifier, 13... Servo amplifier, 15...
Filter, 16... Servo gain control circuit.
Claims (1)
に検知ビームを送る発光部材と、記録媒体からの
反射ビームを受ける受光部材と、対物レンズを補
正動作させるアクチユエータとを有する読取りヘ
ツドが設けられており、且つサスペンシヨンにて
支持されている光学式ピツクアツプにおいて、前
記受光部材の出力から検出されるエラー信号の中
から低い周波数成分を取出すフイルタと、このフ
イルタにより取出された周波数成分の信号強度に
応じて前記アクチユエータによるサーボゲインを
制御するサーボゲイン制御回路とを有しているこ
とを特徴とする光学式ピツクアツプのサーボゲイ
ン制御装置。 A reading head is provided that has an objective lens facing the recording medium, a light emitting member that sends a detection beam to the objective lens, a light receiving member that receives the reflected beam from the recording medium, and an actuator that operates the objective lens to correct it, In addition, in the optical pickup supported by the suspension, there is provided a filter for extracting low frequency components from the error signal detected from the output of the light receiving member, and a filter for extracting low frequency components from the error signal detected from the output of the light receiving member, and a filter for extracting low frequency components from the error signal detected from the output of the light receiving member, and a filter for extracting low frequency components from the error signal detected from the output of the light receiving member, and a filter for extracting low frequency components from the error signal detected from the output of the light receiving member, and a filter for extracting low frequency components from the error signal detected from the output of the light receiving member. A servo gain control device for an optical pickup, comprising a servo gain control circuit for controlling servo gain by the actuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3110285U JPS61149113U (en) | 1985-03-04 | 1985-03-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3110285U JPS61149113U (en) | 1985-03-04 | 1985-03-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61149113U true JPS61149113U (en) | 1986-09-13 |
Family
ID=30531400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3110285U Pending JPS61149113U (en) | 1985-03-04 | 1985-03-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61149113U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59231739A (en) * | 1983-06-14 | 1984-12-26 | Matsushita Electric Ind Co Ltd | Focus controller |
-
1985
- 1985-03-04 JP JP3110285U patent/JPS61149113U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59231739A (en) * | 1983-06-14 | 1984-12-26 | Matsushita Electric Ind Co Ltd | Focus controller |
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