JPH02113816U - - Google Patents
Info
- Publication number
- JPH02113816U JPH02113816U JP1989021917U JP2191789U JPH02113816U JP H02113816 U JPH02113816 U JP H02113816U JP 1989021917 U JP1989021917 U JP 1989021917U JP 2191789 U JP2191789 U JP 2191789U JP H02113816 U JPH02113816 U JP H02113816U
- Authority
- JP
- Japan
- Prior art keywords
- focus
- error signal
- mirror surface
- control circuit
- servo control
- 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 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案に係わるフオーカスサーボ制御
回路のブロツク図、第２図はフオーカスサーボの
説明図、第３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４図及
び第５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。
Fig. 1 is a block diagram of the focus servo control circuit according to the present invention, Fig. 2 is an explanatory diagram of the focus servo, and Fig. 3 shows the signal area in the disk.
Explanatory views of the inner peripheral mirror surface and the outer peripheral mirror surface, and FIGS. 4 and 5 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 section.
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回路において、 デイスク内周ミラー面または外周ミラー面に光
学ピツクアツプを移動させる手段と、 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回路。[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. A focus servo control circuit for controlling the focus servo control circuit includes means for moving an optical pickup to an inner mirror surface or an outer mirror surface of the disk, means for detecting a peak value of a focus error signal on the mirror surface, and a means for detecting a peak value of a focus error signal on the mirror surface. 1. A focus servo control circuit comprising: gain determining means for determining a focus servo gain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989021917U JPH02113816U (en) | 1989-02-27 | 1989-02-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989021917U JPH02113816U (en) | 1989-02-27 | 1989-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02113816U true JPH02113816U (en) | 1990-09-12 |
Family
ID=31239570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989021917U Pending JPH02113816U (en) | 1989-02-27 | 1989-02-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02113816U (en) |
-
1989
- 1989-02-27 JP JP1989021917U patent/JPH02113816U/ja active Pending
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