JPH0431416U - - Google Patents
Info
- Publication number
- JPH0431416U JPH0431416U JP6940590U JP6940590U JPH0431416U JP H0431416 U JPH0431416 U JP H0431416U JP 6940590 U JP6940590 U JP 6940590U JP 6940590 U JP6940590 U JP 6940590U JP H0431416 U JPH0431416 U JP H0431416U
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- extraction means
- light
- light extraction
- lens
- 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
- 238000000605 extraction Methods 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図および第２図は本考案による対物レンズ
駆動装置の一実施例を示す図であり、第１図はそ
の要部の構成を示す断面図、第２図はフオーカス
インにおけるフオーカスＳ字カーブの特性図、第
３図は本考案の他の実施例の要部を示す断面図、
第４図はさらに他の実施例の要部を示す断面図、
第５図は外乱振動が作用した場合のフオーカスＳ
字カーブの特性図である。
１……対物レンズ、２……レンズ支持部材、３
……光デイスク、４……フオーカス方向レンズホ
ールド回路（駆動機構）、８……フオーカスサー
ボ回路（駆動機構）、９……ハーフミラー（光取
出手段）、１０……アパーチヤ（光取出手段）、
１１……位置センサ、１２……反射ミラー（光取
出手段）、１３……ガイドアパーチヤ（光取出手
段）。
1 and 2 are diagrams showing an embodiment of the objective lens driving device according to the present invention. FIG. 1 is a cross-sectional view showing the configuration of its main parts, and FIG. 2 is a focus S-curve at focus-in. Characteristic diagram, FIG. 3 is a sectional view showing the main part of another embodiment of the present invention,
FIG. 4 is a sectional view showing the main parts of yet another embodiment,
Figure 5 shows focus S when disturbance vibration is applied.
FIG. 1...Objective lens, 2...Lens support member, 3
... Optical disk, 4 ... Focus direction lens hold circuit (drive mechanism), 8 ... Focus servo circuit (drive mechanism), 9 ... Half mirror (light extraction means), 10 ... Aperture (light extraction means) ,
11...Position sensor, 12...Reflection mirror (light extraction means), 13...Guide aperture (light extraction means).
Claims (1)
対物レンズにレーザ光を入射させるための光路が
形成されたレンズ支持部材と、前記対物レンズを
フオーカス方向に移動させるため前記レンズ支持
部材をフオーカス方向に作動する駆動機構と、前
記光路内のレーザ光の一部を取り出すようにレン
ズ支持部材に設けられた光取出手段と、この光取
出手段からの光が入射するように設けられて前記
フオーカス方向への移動位置を検出して前記駆動
機構を制御するための信号を出力する位置センサ
とを備えていることを特徴とする対物レンズ駆動
装置。 (2) 前記光取出手段は、前記対物レンズに入射
するレーザ光以外の光を取り出すように設けられ
ていることを特徴とする請求項第(1)項記載の対
物レンズ駆動装置。[Claims for Utility Model Registration] (1) A lens support member to which an objective lens is attached and an optical path for making laser light incident on the objective lens, and a lens supporting member for moving the objective lens in the focus direction. a drive mechanism that operates the support member in the focus direction; a light extraction means provided on the lens support member so as to extract a part of the laser light in the optical path; and a light extraction means provided so that the light from the light extraction means is incident. and a position sensor that detects the position of movement in the focus direction and outputs a signal for controlling the drive mechanism. (2) The objective lens driving device according to claim 1, wherein the light extraction means is provided to extract light other than laser light incident on the objective lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990069405U JP2558405Y2 (en) | 1990-06-29 | 1990-06-29 | Objective lens drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990069405U JP2558405Y2 (en) | 1990-06-29 | 1990-06-29 | Objective lens drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0431416U true JPH0431416U (en) | 1992-03-13 |
| JP2558405Y2 JP2558405Y2 (en) | 1997-12-24 |
Family
ID=31604680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990069405U Expired - Fee Related JP2558405Y2 (en) | 1990-06-29 | 1990-06-29 | Objective lens drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2558405Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63103938A (en) * | 1986-11-25 | 1988-05-09 | Nakamichi Corp | Optical pickup device |
-
1990
- 1990-06-29 JP JP1990069405U patent/JP2558405Y2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63103938A (en) * | 1986-11-25 | 1988-05-09 | Nakamichi Corp | Optical pickup device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2558405Y2 (en) | 1997-12-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |