JPH0366028U - - Google Patents
Info
- Publication number
- JPH0366028U JPH0366028U JP12842989U JP12842989U JPH0366028U JP H0366028 U JPH0366028 U JP H0366028U JP 12842989 U JP12842989 U JP 12842989U JP 12842989 U JP12842989 U JP 12842989U JP H0366028 U JPH0366028 U JP H0366028U
- Authority
- JP
- Japan
- Prior art keywords
- electrical signal
- gain
- disk
- detection means
- displacement detection
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案の構成を例示するブロツク図、
第２図は本考案の一実施例のフオーカスサーボ装
置のブロツク図、第３図は従来のフオーカスサー
ボ装置のブロツク図、第４図イは第３図の要部の
回路図、同図ロはその出力信号の特性図、第５図
は従来のフオーカスサーボ装置のブロツク図であ
る。
２…光学ピツクアツプ（デイスク変位検出手段
）、３…ＲＦアンプ（デイスク変位検出手段）、
６…フオーカスサーボドライバ（駆動装置）、７
…システムコントローラ（ゲイン調整手段）、１
０…レベル調整器、１０２…デイスク変位検出手
段、１０３…レベル調整器、１０４…駆動装置、
１０５…ゲイン調整手段。
FIG. 1 is a block diagram illustrating the configuration of the present invention.
Fig. 2 is a block diagram of a focus servo device according to an embodiment of the present invention, Fig. 3 is a block diagram of a conventional focus servo device, and Fig. 4 A is a circuit diagram of the main part of Fig. 3. FIG. 5 is a block diagram of a conventional focus servo device. 2... Optical pickup (disk displacement detection means), 3... RF amplifier (disk displacement detection means),
6...Focus servo driver (drive device), 7
...System controller (gain adjustment means), 1
0... Level adjuster, 102... Disk displacement detection means, 103... Level adjuster, 104... Drive device,
105...Gain adjustment means.
Claims (1)
記録面に近接対向し、この記録面の半径方向およ
び法線方向に移動自在に設けらられるとともに、
この光デイスクとの距離と所定距離との変位に対
応する電気信号を出力するデイスク変位検出手段
と、 供給されたゲイン信号に基づくゲインで前記電
気信号を増幅あるいは減衰するレベル調整器と、 前記レベル調整器の出力信号に基づいて、前記
光デイスクと前記デイスク変位検出手段との距離
を前記所定距離に近付けるように前記デイスク変
位検出手段を前記法線方向に移動させる駆動装置
と、 前記デイスク変位検出手段が前記トラツクを横
切るように前記半径方向に移動する場合には前記
電気信号が小となり、これ以外の場合には前記電
気信号が大となるようなゲイン信号を前記レベル
調整器に供給するゲイン調整手段と を具備することを特徴とするフオーカスサーボ装
置。[Claims for Utility Model Registration] A spiral track is provided closely facing the recording surface of an optical disk and is movable in the radial direction and normal direction of the recording surface, and
a disk displacement detection means that outputs an electrical signal corresponding to the displacement between the distance to the optical disk and a predetermined distance; a level adjuster that amplifies or attenuates the electrical signal with a gain based on the supplied gain signal; a drive device that moves the disk displacement detection means in the normal direction so that the distance between the optical disk and the disk displacement detection means approaches the predetermined distance based on the output signal of the adjuster; a gain for providing a gain signal to the level adjuster such that when the means moves in the radial direction across the track, the electrical signal is small; otherwise, the electrical signal is large; A focus servo device comprising: an adjustment means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12842989U JPH0366028U (en) | 1989-11-01 | 1989-11-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12842989U JPH0366028U (en) | 1989-11-01 | 1989-11-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0366028U true JPH0366028U (en) | 1991-06-27 |
Family
ID=31676136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12842989U Pending JPH0366028U (en) | 1989-11-01 | 1989-11-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0366028U (en) |
-
1989
- 1989-11-01 JP JP12842989U patent/JPH0366028U/ja active Pending
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