JPH0352818U - - Google Patents
Info
- Publication number
- JPH0352818U JPH0352818U JP11158489U JP11158489U JPH0352818U JP H0352818 U JPH0352818 U JP H0352818U JP 11158489 U JP11158489 U JP 11158489U JP 11158489 U JP11158489 U JP 11158489U JP H0352818 U JPH0352818 U JP H0352818U
- Authority
- JP
- Japan
- Prior art keywords
- pick
- amplifier
- focus error
- pickup device
- optical pickup
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の一実施例による光ピツクアツ
プ装置のブロツク構成図、第２図は同装置に内蔵
するフオーカスアクチエータの構成図である。
１……ピツクアツプ、２……フオーカスアクチ
エータ、３……フオーカスエラー増幅器、３ａ…
…オペアンプ、４……ドライバ、５……サーボプ
ロセツサ、６……利得制御回路、７……対物レン
ズ、８……フオーカスコイル、Ｑ１……トランジ
スタ、Ｒ１，Ｒ２……抵抗。
FIG. 1 is a block diagram of an optical pickup device according to an embodiment of the present invention, and FIG. 2 is a diagram of a focus actuator built into the device. 1...Pickup, 2...Focus actuator, 3...Focus error amplifier, 3a...
... operational amplifier, 4 ... driver, 5 ... servo processor, 6 ... gain control circuit, 7 ... objective lens, 8 ... focus coil, Q1 ... transistor, R1, R2 ... resistance.
Claims (1)
光学手段にて読取るピツクアツプと、このピツク
アツプによる読取り時に、発生するフオーカスエ
ラー信号をピツクアツプより受けて増幅するフオ
ーカスエラー増幅器と、該増幅器出力を電力増幅
するドライバと、このドライバ出力を得てフオー
カスエラーを補正するフオーカスアクチエータと
を具備した光ピツクアツプ装置において、 前記増幅器の利得を、トラツクサーチ時に、低
下させる利得制御回路を設けたことを特徴とする
光ピツクアツプ装置。[Scope of Claim for Utility Model Registration] A pick-up that reads signals on the surface of a disc such as a compact disc using optical means; a focus error amplifier that receives and amplifies a focus error signal generated from the pick-up during reading by the pick-up; In an optical pickup device comprising a driver for power amplifying the output of the amplifier, and a focus actuator for obtaining the driver output and correcting a focus error, a gain control circuit reduces the gain of the amplifier during a track search. An optical pickup device characterized by being provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989111584U JP2541756Y2 (en) | 1989-09-22 | 1989-09-22 | Optical pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989111584U JP2541756Y2 (en) | 1989-09-22 | 1989-09-22 | Optical pickup device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0352818U true JPH0352818U (en) | 1991-05-22 |
| JP2541756Y2 JP2541756Y2 (en) | 1997-07-16 |
Family
ID=31660054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989111584U Expired - Lifetime JP2541756Y2 (en) | 1989-09-22 | 1989-09-22 | Optical pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2541756Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5977638A (en) * | 1982-10-26 | 1984-05-04 | Nippon Gakki Seizo Kk | Controlling device of focus servo in optical type disc reproducing device |
-
1989
- 1989-09-22 JP JP1989111584U patent/JP2541756Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5977638A (en) * | 1982-10-26 | 1984-05-04 | Nippon Gakki Seizo Kk | Controlling device of focus servo in optical type disc reproducing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2541756Y2 (en) | 1997-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |