JPH02123718U - - Google Patents
Info
- Publication number
- JPH02123718U JPH02123718U JP2933289U JP2933289U JPH02123718U JP H02123718 U JPH02123718 U JP H02123718U JP 2933289 U JP2933289 U JP 2933289U JP 2933289 U JP2933289 U JP 2933289U JP H02123718 U JPH02123718 U JP H02123718U
- Authority
- JP
- Japan
- Prior art keywords
- focus
- limit switch
- error signal
- disk
- control device
- 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 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
Description
第１図は本考案に係わるフオーカスサーボ制御
装置のブロツク図、第２図はリミツトスイツチの
配設位置とデイスク形状の関係図、第３図はピツ
クアツプ送り機構の概略説明図、第４図はフオー
カスサーボの説明図、第５図はデイスクにおける
信号エリア、内周ミラー面、外周ミラー面の説明
図、第６図及び第７図は従来の問題点を説明する
ための図である。
１２……光学ピツクアツプ、１４……エラー信
号生成部、１５……ゲイン調整器、１８ａ……ピ
ーク値ホールド部、１８ｃ……データ演算部、１
９……ゲイン決定制御部、２３……リミツトスイ
ツチ。
Fig. 1 is a block diagram of the focus servo control device according to the present invention, Fig. 2 is a diagram showing the relationship between the position of the limit switch and the shape of the disk, Fig. 3 is a schematic explanatory diagram of the pick-up feed mechanism, and Fig. 4 is a diagram of the focus servo control device according to the present invention. FIG. 5 is an explanatory diagram of the signal area, inner peripheral mirror surface, and outer peripheral mirror surface of the disk, and FIGS. 6 and 7 are diagrams for explaining conventional problems. 12...Optical pickup, 14...Error signal generation section, 15...Gain adjuster, 18a...Peak value hold section, 18c...Data calculation section, 1
9...Gain determination control unit, 23...Limit switch.
Claims (1)
面間の距離変動に応じてフオーカスエラー信号を
発生し、該フオーカスエラー信号により対物レン
ズの焦点をデイスク反射面に合致させるようにす
るフオーカスサーボ制御装置において、 固定部に設けられ、レーザビームがデイスク内
周ミラー面に照射する位置まで光学ピツクアツプ
が移動した時に動作するリミツトスイツチと、 光学ピツクアツプを移動させると共に、前記リ
ミツトスイツチの動作により光学ピツクアツプの
移動を停止させるピツクアツプ移動手段と、 ミラー面におけるフオーカスエラー信号のピー
ク値を検出する手段と、 該ピーク値に基づいてフオーカスサーボゲイン
を決定するゲイン決定手段とを有することを特徴
とするフオーカスサーボ制御装置。[Claims for Utility Model Registration] A focus error signal is generated in response to a change in the distance between the objective lens of an optical pickup and a disk reflective surface, and the focus error signal is used to align the focus of the objective lens with the disk reflective surface. The focus servo control device includes: a limit switch that is provided on a fixed part and operates when the optical pick-up moves to a position where the laser beam irradiates the inner peripheral mirror surface of the disk; and a limit switch that moves the optical pick-up and controls the operation of the limit switch. a pickup moving means for stopping the movement of the optical pickup; means for detecting a peak value of a focus error signal on a mirror surface; and a gain determining means for determining a focus servo gain based on the peak value. Features a focus servo control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2933289U JPH02123718U (en) | 1989-03-15 | 1989-03-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2933289U JPH02123718U (en) | 1989-03-15 | 1989-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02123718U true JPH02123718U (en) | 1990-10-11 |
Family
ID=31253455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2933289U Pending JPH02123718U (en) | 1989-03-15 | 1989-03-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02123718U (en) |
-
1989
- 1989-03-15 JP JP2933289U patent/JPH02123718U/ja active Pending