JPS6022744A - Pickup device - Google Patents
Pickup deviceInfo
- Publication number
- JPS6022744A JPS6022744A JP8239584A JP8239584A JPS6022744A JP S6022744 A JPS6022744 A JP S6022744A JP 8239584 A JP8239584 A JP 8239584A JP 8239584 A JP8239584 A JP 8239584A JP S6022744 A JPS6022744 A JP S6022744A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- optical axis
- frame
- coil
- bobbin
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/093—Electromechanical actuators for lens positioning for focusing and tracking
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は光学的に情報を記録したディスク、主としてビ
デオディスクプレーヤーのピックアップの改良に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the pickup of optically recorded information discs, primarily video disc players.
光学的に情報を記録したディスク、主に光学式ビデオデ
ィスのプレーヤーのピックアップの働きとしては読み取
りビームをディスク面に集束させるフォーカシングと、
読み取りビームを情報トラックに追従させるトラッキン
グとがある。さらに場合によっては読み取りビームをト
ラタ方向に動かして読み取り信号の時間調整も行なう。The pickup function of a player for optically recorded information on discs, mainly optical video discs, is to focus the reading beam onto the disc surface.
There is tracking, which causes the reading beam to follow the information track. Furthermore, depending on the case, the reading beam may be moved in the traverse direction to adjust the time of the reading signal.
従来フォーカシングは対物レンズを光軸方向に動かし、
トラッキングはガルバノミラ−を動かして対物レンズに
入射する読取り用のビームを傾けてそれぞれ行なってい
た。Conventional focusing moves the objective lens in the direction of the optical axis.
Tracking was performed by moving a galvanometer mirror and tilting the reading beam incident on the objective lens.
しかし、トラッキングを行なうためにガルバノミラ−を
相当の高速度で動かすためには大きな力が必要となり、
また装置の機構は大がかりなものとなり、消費する電力
も大きくならざるを得なかった。However, a large amount of force is required to move the galvano mirror at a fairly high speed for tracking.
In addition, the mechanism of the device was large-scale, and the power consumption had to be large.
本発明の目的は簡単な構成でかつ小型軽量、低消費電力
のピックアップの構造を提供することにある。An object of the present invention is to provide a pickup structure that has a simple configuration, is small, lightweight, and has low power consumption.
本発明は光学的に情報を記録したディスク再主装置にお
いて、レンズを光軸方向に動かして読取り用光束のフォ
ーカシングを行なう手段と。The present invention provides means for focusing a reading light beam by moving a lens in the optical axis direction in a disk remastering device on which information is optically recorded.
上記レンズを光軸と直角な方向に動かして上記読取り用
光束のトラッキングを行なう手段とを設けたことを特徴
とするものである。The apparatus is characterized in that it includes means for tracking the reading light beam by moving the lens in a direction perpendicular to the optical axis.
以下図面につき本発明の詳細な説明する。The invention will now be described in detail with reference to the drawings.
本発明に於いてレンズを各方向に動かすことによってフ
ォーカシング、トラッキング調整を行なうことができる
ので、駆動機構は簡単化することができ、寸法的にも消
費電力の点からも従来例より優れている。なおレンズは
光軸に垂直な光ビームのみを取り扱えばよいので、簡単
な構成とすることができ、したがって軽量、小型とする
ことができる。又さらにディスクの回転むら等による読
出し信号の時間的なずれを補償したい場合には上記レン
ズを第１図の紙面に垂直な方向に動かしてやればよい。In the present invention, focusing and tracking can be adjusted by moving the lens in each direction, so the drive mechanism can be simplified, and it is superior to conventional examples in terms of size and power consumption. . Note that since the lens only needs to handle light beams perpendicular to the optical axis, it can have a simple configuration, and can therefore be made lightweight and compact. Furthermore, if it is desired to compensate for temporal deviations in the readout signal due to uneven rotation of the disk, etc., the lens may be moved in a direction perpendicular to the paper plane of FIG.
次にレンズを各方向に駆動する機構について第１図、第
２図に示す。第１図はレンズ駆動機構の光軸に沿った断
面図である。レンズ１２は円筒形にフランジのついた形
状のし、ンズ枠１３に取り付けられ、レンズ枠−１３は
ばね１４及びダンパー１５を介してマグネット１６に取
り付けられている。ばね１４はレンズ１２の光軸方向に
曲がり、レンズ１２の半径方向にも伸縮性を有するもの
であり、したがってレンズ１２、枠１３は光軸方向、半
径方向に動くことができる。さらにレンズ枠１３にはコ
イルボビン１７が取り付けられていて、これに第２図に
示す構造のコイルが形成されている。第２図（ａ）はコ
イルの斜視図、第２図（ｂ）はコイルを光軸方向から見
た図である。図示するようにボビン１７の表面には４つ
のコイル１８〜２１が設けられている。これ等のコイル
の上には通常のコイル２２が巻かれている。Next, a mechanism for driving the lens in each direction is shown in FIGS. 1 and 2. FIG. 1 is a cross-sectional view of the lens drive mechanism taken along the optical axis. The lens 12 has a cylindrical shape with a flange and is attached to a lens frame 13, and the lens frame 13 is attached to a magnet 16 via a spring 14 and a damper 15. The spring 14 is bent in the optical axis direction of the lens 12 and has elasticity in the radial direction of the lens 12, so that the lens 12 and the frame 13 can move in the optical axis direction and the radial direction. Furthermore, a coil bobbin 17 is attached to the lens frame 13, and a coil having the structure shown in FIG. 2 is formed on this. FIG. 2(a) is a perspective view of the coil, and FIG. 2(b) is a view of the coil viewed from the optical axis direction. As shown in the figure, four coils 18 to 21 are provided on the surface of the bobbin 17. A normal coil 22 is wound on top of these coils.
マグネット１６によってギャップ２３には磁界が形成さ
れているのでコイル１８と２０に適当な方向の電流を流
せばコイルボビン１７は光軸と直角な方向に動き、コイ
ル１９と２１に電流を流せばこれと直角な方向に動く。A magnetic field is formed in the gap 23 by the magnet 16, so if a current is applied in the appropriate direction to the coils 18 and 20, the coil bobbin 17 will move in a direction perpendicular to the optical axis, and if current is applied to the coils 19 and 21, this will move. move at right angles.
又コイル２２に電流を流すとボビン１７は光軸方向に動
く。したがってこれ等につれてレンズ１２も各々方向に
動き、各コイルに流す電流によってレンズ１２を上述し
た各方向に動かすことができることになる。Furthermore, when a current is applied to the coil 22, the bobbin 17 moves in the optical axis direction. Therefore, the lens 12 also moves in each direction along with these, and the lens 12 can be moved in each of the above-mentioned directions by the current flowing through each coil.
なお本発明は上述した実施例に限られるものではなく、
又ビデオディスク再生装置に限らず、例えば音楽情報を
記録したディスク再生装置等にも使用できることはもち
ろんである。Note that the present invention is not limited to the above-mentioned embodiments,
It goes without saying that the present invention can be used not only for video disk playback devices but also for example for disk playback devices on which music information is recorded.
本発明によればレンズを動かすことによりフォーカシン
グ、トラッキング等を行なうことができるので駆動機構
が簡単になり、又低消費エネルギーとなり、さらに高速
で正確な制御が可能である。According to the present invention, focusing, tracking, etc. can be performed by moving the lens, which simplifies the driving mechanism, reduces energy consumption, and enables high-speed and accurate control.
第１図はレンズを各方向に動かｔ機構の一例を示す縮図
、第２図（ａ ）および（ｂ）はレンズを各方向に動か
すコイルの斜視図および光軸方向から見た線図である。
１２・・・レンズ、１３・・・レンズ枠、１４・・・ば
ね、１５・・・ダンパー、１６・・・マグネット、１７
・・・コイルボビン、１８〜２１・・・コイル、２２・
・・コイル、２３・・・ギャップFigure 1 is a miniature diagram showing an example of a t-mechanism that moves the lens in each direction, and Figures 2 (a) and (b) are perspective views and line diagrams of the coil that moves the lens in each direction as seen from the optical axis direction. . 12... Lens, 13... Lens frame, 14... Spring, 15... Damper, 16... Magnet, 17
... Coil bobbin, 18-21 ... Coil, 22.
...Coil, 23...Gap
Claims (1)
ンズをレンズ光軸方向並びにレンズ光軸と直交する方向
に駆動するピックアップ装置において、ひとつの磁気回
路中にフォーカシング方向駆動用コイルと］・ラッキン
グ方向駆動用コイルを配置すると共に、伸縮性を有する
弾性支持部材で前記レンズをベースに対し支持し、前記
コイルに電流を通すことにより前記レンズをフォーカシ
ング方向とトラッキング方向とにそれぞれ制御するよう
にしたことを特徴とするピックアップ装置。1. In a pickup device that drives a lens in the lens optical axis direction and in a direction orthogonal to the lens optical axis in order to read information recorded on a recording medium, a focusing direction driving coil and a focusing direction driving coil are included in one magnetic circuit. In addition to arranging a racking direction driving coil, the lens is supported with respect to the base by an elastic support member having elasticity, and the lens is controlled in the focusing direction and the tracking direction by passing current through the coil. A pickup device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8239584A JPS6022744A (en) | 1984-04-24 | 1984-04-24 | Pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8239584A JPS6022744A (en) | 1984-04-24 | 1984-04-24 | Pickup device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2678A Division JPS5494007A (en) | 1978-01-05 | 1978-01-05 | Pickup for disc recorder recorded optically with information |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6022744A true JPS6022744A (en) | 1985-02-05 |
| JPH0447899B2 JPH0447899B2 (en) | 1992-08-05 |
Family
ID=13773395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8239584A Granted JPS6022744A (en) | 1984-04-24 | 1984-04-24 | Pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6022744A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5222056A (en) * | 1989-03-30 | 1993-06-22 | Asahi Kogaku Kogyo K.K. | Optical pickup apparatus having a compact structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4935201U (en) * | 1972-06-30 | 1974-03-28 | ||
| JPS51114102A (en) * | 1975-04-01 | 1976-10-07 | Victor Co Of Japan Ltd | Signal reading and control device for disc player |
-
1984
- 1984-04-24 JP JP8239584A patent/JPS6022744A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4935201U (en) * | 1972-06-30 | 1974-03-28 | ||
| JPS51114102A (en) * | 1975-04-01 | 1976-10-07 | Victor Co Of Japan Ltd | Signal reading and control device for disc player |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5222056A (en) * | 1989-03-30 | 1993-06-22 | Asahi Kogaku Kogyo K.K. | Optical pickup apparatus having a compact structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0447899B2 (en) | 1992-08-05 |
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