JPH0317837A - Optical pickup drive in optical information recorder - Google Patents
Optical pickup drive in optical information recorderInfo
- Publication number
- JPH0317837A JPH0317837A JP2135151A JP13515190A JPH0317837A JP H0317837 A JPH0317837 A JP H0317837A JP 2135151 A JP2135151 A JP 2135151A JP 13515190 A JP13515190 A JP 13515190A JP H0317837 A JPH0317837 A JP H0317837A
- Authority
- JP
- Japan
- Prior art keywords
- tracking
- coil
- optical
- focusing
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 38
- 230000009471 action Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000003993 interaction Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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
-
- 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
-
- 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
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/0857—Arrangements for mechanically moving the whole head
- G11B7/08582—Sled-type positioners
-
- 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
- G11B7/0932—Details of sprung supports
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は光ディスクを利用して各種の情報を記録或いは
再生する光学的情報記録再生装置における光ピックアッ
プ駆動装置、より詳細には光ディスクから受光された光
を処理し情報信号を発生させる光学的情報記録再生装置
において、簡単な仕組みによりディスクに対して迅速且
つ正確なトラッキングができるようにした光ピックアッ
プの駆動装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical pickup drive device in an optical information recording and reproducing apparatus that records or reproduces various information using an optical disc, and more specifically, to an optical pickup drive device for recording or reproducing various information using an optical disc. The present invention relates to an optical pickup drive device that enables quick and accurate tracking of a disk using a simple mechanism in an optical information recording and reproducing device that processes information signals and generates information signals.
従来の技術
一般に光ディスクは製作上の誤差によりディスクの中心
とディスク上のトラックの中心は完全な一致は見られず
、又ディスクか完全な平面を保つことができない。2. Description of the Related Art In general, optical discs do not have a perfect alignment between the center of the disc and the center of the track on the disc due to manufacturing errors, and the disc cannot maintain a perfect flat surface.
従って、固定された軸を中心に回転駆動するディスクは
上下或いは左右への振れ現象が起こり、これに伴って前
記ディスク上に必要な情報を記録したり記録された情報
を再生するための光ピックアップ装置もまた上記のよう
なディスクの振れに追従しなからトラック方向に移動し
なければならない。Therefore, a disk that is driven to rotate around a fixed axis may wobble vertically or horizontally, and this causes an optical pickup to record necessary information on the disk or reproduce recorded information. The device must also move in the track direction without following the deflection of the disk as described above.
′従来の光学的情報記録再生装置における光ピックアッ
プ装置としては日本実用新案公開公報昭６３２２６１３
号、６３−４７４１７号及び６３−１１４４１２号に示
されている。'Japanese Utility Model Publication Publication No. 6322613 as an optical pickup device in a conventional optical information recording/reproducing device
No. 63-47417 and No. 63-114412.
このような光ピックアップ駆動装置は光ピックアップ本
体に取り付ける支持ベースと対物レンズ保持用ホルダー
との間に４個の円筒形の弾性体を連続した構造からなっ
ており、これによってホルダー上に取り付けられたトラ
ッキングコイル及びフォーカシングコイルに電流が印加
される時、このトラッキング及びフォーカシングコイル
の相対する位置におかれた永久磁石とこれら各コイルと
の間の相互作用によって発生する相互磁場作用により前
記対物レンズがディスクに対する焦点方向並びにディス
クに対するトラッキング方向の振れに追従するようにな
る。Such an optical pickup driving device has a structure in which four cylindrical elastic bodies are connected in series between a support base attached to the optical pickup body and a holder for holding the objective lens. When a current is applied to the tracking coil and the focusing coil, the objective lens is moved toward the disk due to the mutual magnetic field action generated by the interaction between the tracking and focusing coils and the permanent magnets placed at opposite positions of the tracking and focusing coils. It follows the deflection in the focal direction relative to the disk and in the tracking direction relative to the disk.
一方、第３図は日本のソニー社の光ピックアップ装置を
示したもので、ボビン２２の側面に取り付けられたトラ
ッキングコイル２３．２３’ 並びにフォーカシングコ
イル３１．３１’ に電流が流れると基板２５に据え付
けられた永久磁石２４，２４゛から生ずる磁場とトラッ
キングコイル２３，２３゛及びフォーカシングコイル３
１．３１’ との相互作用によって追従力か発生する
ようになり、これによって上記のボビンかビン２６によ
り案内され、焦点方向の振れに追従する一方、ビン２６
を中心として回転するためボビン２２に偏心して取り付
けられた対物レンズ２ｌがディスクのトラッキング方向
の振れに追従するようになる。又上記の光ピックアップ
装置はモータ２８とギャ２９によってガイド捧３０．３
０’ に従って左右に直線運動することによって目標と
するトラックへ移動することになる。On the other hand, FIG. 3 shows an optical pickup device manufactured by Sony Corporation in Japan, in which when current flows through the tracking coil 23, 23' and focusing coil 31, 31' attached to the side of the bobbin 22, they are installed on the board 25. The magnetic field generated from the permanent magnets 24, 24', the tracking coils 23, 23' and the focusing coil 3
1.31', a tracking force is generated by the interaction with the bobbin 26, which causes the bobbin 26 to follow the deflection in the focal direction, while the bobbin 26
Since the objective lens 2l, which is eccentrically attached to the bobbin 22, rotates around the center, the objective lens 2l follows the deflection of the disk in the tracking direction. Further, the above optical pickup device uses a motor 28 and a gear 29 to provide a guide shaft 30.3.
By moving linearly left and right according to 0', the vehicle moves to the target track.
発明が解決しようとする課題
上記のような従来の光ピックアップ駆動装置は、ディス
クのトラック移動手段とディスクのトラッキング方向へ
の振れに追従するための駆動手段か２元化されることに
よってその構造が複雑であり、２元化された駆動手段を
制御するための制御回路か複雑化するという短所が指摘
されてきた。Problems to be Solved by the Invention The structure of the conventional optical pickup drive device as described above is improved by dualizing the disk track moving means and the drive means for following the deflection of the disk in the tracking direction. It has been pointed out that the control circuit is complicated and that the control circuit for controlling the dual driving means becomes complicated.
問題点を解決するための手段
このような短所を解決するために本発明の装置は、受光
された光を処理し情報信号を再生する光学装置が内蔵さ
れ上記ディスクのトラッキング方向へ移動できるように
してあるフレームと、上記のフレームに対して対物レン
ズを支持しトラッキングコイル並びにフォーカシングコ
イルとを備えた支持手段と、上記トラッキングコイル並
びにフォーカシングコイルと相対する位置に据え付けら
れこれらコイルに電流が印加される時相互磁場作用を発
生させるための永久磁石と、それに上記フレームのトラ
ッキング方向への移動を案内する案内手段とからなって
いる。Means for Solving the Problems In order to solve these disadvantages, the device of the present invention has a built-in optical device that processes the received light and reproduces an information signal, and is movable in the tracking direction of the disk. a support means that supports an objective lens with respect to the frame and includes a tracking coil and a focusing coil, and is installed at a position facing the tracking coil and focusing coil, and a current is applied to these coils. It consists of a permanent magnet for generating mutual magnetic field action, and a guide means for guiding the movement of the frame in the tracking direction.
作用
以上のような構成からなる本発明において、トラッキン
グコイルとフォーカシングコイルとに電流を印加され、
永久磁石とこれらコイルとの間に相互磁場作用が発生す
る時、支持手段から生ずる弾性力によって対物レンズが
永久磁石に対して焦点方向並びにトラッキング方向へ相
対運動をおこすことによって、ディスクに対して迅速且
つ正確なトラッキングができるようになる。In the present invention having the above-described configuration, a current is applied to the tracking coil and the focusing coil,
When a mutual magnetic field action occurs between the permanent magnet and these coils, the elastic force generated from the support means causes the objective lens to move relative to the permanent magnet in the focal direction and in the tracking direction, thereby rapidly moving the objective lens relative to the disk. Moreover, accurate tracking becomes possible.
実施例
以下本発明の実施例を図面と共に詳細に説明する。第五
図及び第２図に示してあるように、本発明は光学装置が
内蔵されトラッキング方向へ移動ができるようになって
いるフレームと、前記フレームに対して可動コイルが取
り付けられた対物レンズを支える支持手段と、上記フレ
ームのトラッキング方向への移動を案内する案内手段等
からなっている。EXAMPLES Hereinafter, examples of the present invention will be described in detail with reference to the drawings. As shown in FIG. 5 and FIG. 2, the present invention includes a frame having a built-in optical device and movable in the tracking direction, and an objective lens having a movable coil attached to the frame. It consists of a support means for supporting the frame, a guide means for guiding the movement of the frame in the tracking direction, and the like.
支持手段は、フレームＩと間隔保持片３の各左右側面の
間に適正位置にそれぞれ取り付けられ、前記対物レンズ
７のトラッキング方向へ強力な弾性力をもたせたトラッ
キング支持板２．２’，前記間隔保持片３の上下面の中
間部位と前記対物レンズ７を取り付けた支持片９との上
下面の間にそれぞれ取り付けられ前記対物レンズ７の焦
点方向へ強力な弾性力をもたせたフォーカシング支持板
４．４’，前記支持片９の左右側面にそれぞれ取り付け
られたトラッキングコイル５．５’ ．ｎ記支持片９の
下部外周面に取り付けられたフォーカシングコイル６等
からなっている。案内手段は、フレームｌの後端部の上
下突出部にあけられたガイド孔１１．１１゜，このガイ
ド孔１１．１１’に嵌入されるガイド棒１２，１２゜，
前記フレームｌがこのガイド棒１２，１２゜に従って左
右に移動し、フレームｌの先端部の下側に内蔵されたレ
ーザーダイオード並びにフォトダイオード等の光学装置
からなっている。The supporting means includes a tracking support plate 2.2' which is attached at an appropriate position between the left and right side surfaces of the frame I and the spacing piece 3, and has a strong elastic force in the tracking direction of the objective lens 7; 4. A focusing support plate 4, which is attached between the intermediate portion of the upper and lower surfaces of the holding piece 3 and the upper and lower surfaces of the support piece 9 to which the objective lens 7 is attached, and has a strong elastic force in the direction of the focal point of the objective lens 7. 4', tracking coils 5.5' attached to the left and right sides of the support piece 9, respectively. It consists of a focusing coil 6 and the like attached to the lower outer circumferential surface of the n support piece 9. The guide means includes a guide hole 11.11° formed in the upper and lower protrusions of the rear end of the frame l, a guide rod 12, 12° fitted into the guide hole 11.11',
The frame 1 moves left and right along the guide rods 12 and 12 degrees, and is comprised of optical devices such as a laser diode and a photodiode built into the lower side of the tip of the frame 1.
永久磁石８は、前記支持片９と相対する位置に前記ガイ
ド捧１２．１２゜ と平行するように取り付けられ前記
フォーカシング並びにトラッキングコイルに電流が流れ
る時これら各コイルとの間に相互磁場作用を発生させる
。A permanent magnet 8 is mounted in parallel with the guide rod 12.12° at a position opposite to the support piece 9, and generates mutual magnetic field action between the focusing and tracking coils when current flows through them. let
一方、支持片９の中央部に取り付けられた対物レンズ７
はそれぞれ先端が間隔保持片３の上下に固定されたフォ
ーカシング支持板４，４′によって対物レンズの焦点方
向への移動、即ち上下動ができるように支えられている
。この間隔保持片３の左右にそれぞれ先端が固定された
トラッキング支持板２，２′ のそれぞれ他端はフレー
ム１の左右側面にそれぞれ支えられている。On the other hand, an objective lens 7 attached to the center of the support piece 9
are supported by focusing support plates 4 and 4' whose tips are fixed above and below the spacing piece 3, respectively, so that they can move in the direction of the focal point of the objective lens, that is, can move up and down. The other ends of the tracking support plates 2, 2', whose tips are fixed to the left and right sides of the spacing piece 3, respectively, are supported by the left and right side surfaces of the frame 1, respectively.
前記フォーカシング支持板及びトラッキング支持板は弾
性をもつ薄板でできている。従って、フォーカシング支
持板は対物レンズ７の焦点方向、つまり上下方向への僅
かな力によっても反り現象がおこるがトラッキング方向
である左右方向には抵抗か大きいため反り現象がおこり
えない。The focusing support plate and the tracking support plate are made of elastic thin plates. Therefore, although the focusing support plate is warped by a slight force in the focal direction of the objective lens 7, that is, in the vertical direction, the warping does not occur in the tracking direction, which is the horizontal direction, because the resistance is large.
なお、トラッキング支持板はフォーカシング支持板と反
対にトラッキング方向には僅かな力によっても反り現象
がおこるが、焦点方向には反り現象はおこりえない。Note that, contrary to the focusing support plate, the tracking support plate is warped in the tracking direction even by a slight force, but not in the focus direction.
従って、フォーカシングコイル６に電流が流れると、こ
の電流と永久磁石８から発生する磁場との相互作用によ
って前記フ才−カシングコイルがその影響を受け、フ才
一カシング支持板４．４゛が反りをおこし支持片９に取
り付けられた対物レンズ７が焦点方向である上下動をお
こすようになる。又トラッキングコイル５．５′ に電
流が流れると、永久磁石８から発生する磁場との相互作
用によって前記トラッキングコイルが永久磁石に対して
相対的に影響を受けるため、トラッキング支持板２，２
゛が反りをおこすので対物レンズ７かトラッキング方向
へ稼働するようになるが、この際トラッキングコイル５
．５′が受ける力かガイド俸１２，１２’ とガイド
孔１１．１１’ との各接触面上の摩擦力より大きけ
ればフレームｌがガイド棒１２，１２’ に従って移動
し、上記フレームに支えられている対物レンズ７が大幅
に移動をおこす。この際、トラッキング支持板２．２′
の弾性係数とガイド孔１１．１１’ 並びにガイド棒１
２．１２’ との摩擦力を適正に定めることによって
、対物レンズ７のフレーム１に対する相対変位を一定限
度以内に抑えた状態において対物レンズ７をトラッキン
方向へ移動が可能となる。Therefore, when a current flows through the focusing coil 6, the focusing coil is affected by the interaction between this current and the magnetic field generated from the permanent magnet 8, causing the focusing support plate 4.4 to warp. The objective lens 7 attached to the support piece 9 moves up and down in the focal direction. Furthermore, when a current flows through the tracking coil 5.5', the tracking coil is influenced relative to the permanent magnet by interaction with the magnetic field generated from the permanent magnet 8, so that the tracking support plates 2, 2
Since ゛ is warped, the objective lens 7 begins to move in the tracking direction, but at this time, the tracking coil 5
．． If the force received by 5' is greater than the frictional force on each contact surface between the guide bars 12, 12' and the guide holes 11, 11', the frame l moves along the guide bars 12, 12' and is supported by the frame. The objective lens 7 that is currently in use will move significantly. At this time, the tracking support plate 2.2'
The elastic modulus of guide hole 11.11' and guide rod 1
2.12', the objective lens 7 can be moved in the tracking direction while the relative displacement of the objective lens 7 with respect to the frame 1 is suppressed within a certain limit.
発明の効果
以上のように本発明はトラッキング方向への駆動手段を
単一化させることによって光ピック了ツブ駆動装置の総
体的な構造が簡単にして又小型化か可能となるため、デ
ィスクに対して迅速且つ正確なトラッキングか可能とな
る長所がある。Effects of the Invention As described above, the present invention simplifies the overall structure of the optical pick-up drive device by unifying the drive means in the tracking direction and makes it possible to downsize it. This has the advantage of allowing quick and accurate tracking.
第１図は本発明装置の動作状態の斜視図、第２図は本発
明装置の側断面図、第３図は従来の光ピックアップ駆動
装置の分解斜視図である。
ｌ・・・フレーム、２．２′・・・トラッキング支持板
、３・・・間隔保持片、４，４′・・・フォーカシング
支持板、５．５’ ・・・トラッキングコイノレ、６・
・・フォーカシングコイル、７・・・対物レンズ、８・
・・永久磁石。FIG. 1 is a perspective view of an operating state of the device of the present invention, FIG. 2 is a side sectional view of the device of the present invention, and FIG. 3 is an exploded perspective view of a conventional optical pickup driving device. l... Frame, 2.2'... Tracking support plate, 3... Spacing holding piece, 4, 4'... Focusing support plate, 5.5'... Tracking coinhole, 6.
...Focusing coil, 7...Objective lens, 8.
··permanent magnet.
Claims (3)
発生させる光ディスク装置のピックアップ駆動装置にお
いて、光学装置が内蔵され前記ディスクのトラッキング
方向へ移動可能となるようにしたフレームと、前記フレ
ームに対して対物レンズを支えトラッキングコイル及び
フォーカシングコイルを備えた支持手段と、前記フレー
ムコイル及びフォーカシングコイルと相対する位置に固
定されこれらのコイルに電流が印加される時相互磁場作
用を発生させるための永久磁石と、上記のフレームのト
ラッキング方向への移動を案内する案内手段とからなり
、上記の永久磁石と前記コイル等の間に相互磁場作用が
発生する時前記保持手段において発生する弾性力によっ
て前記対物レンズが前記永久磁石に対して焦点方向並び
にトラッキング方向へ相対運動をするようにしてあるこ
とを特徴とする光学的情報記録装置における光ピックア
ップ駆動装置。(1) In a pickup drive device of an optical disc device that generates a driving force for following the track of an optical disc, there is provided a frame having a built-in optical device and movable in the tracking direction of the disc; a supporting means for supporting an objective lens and having a tracking coil and a focusing coil; a permanent magnet fixed in a position opposite to the frame coil and the focusing coil to generate mutual magnetic field action when a current is applied to these coils; , a guide means for guiding the movement of the frame in the tracking direction, and when a mutual magnetic field action occurs between the permanent magnet and the coil etc., the objective lens is moved by the elastic force generated in the holding means. An optical pickup driving device in an optical information recording device, characterized in that the optical pickup driving device is configured to move relative to the permanent magnet in a focal direction and a tracking direction.
支持片、間隔支持片、また前記支持片と間隔支持片との
間に連結される弾性をもつ薄板からなる、少なくとも１
枚のフォーカシング支持板並びにトラッキング支持板等
からなることを特徴とする請求項第１項記載の光学的情
報記録装置における光ピックアップ駆動装置。(2) The support means includes at least one support piece to which the objective lens is attached, a spacing support piece, and an elastic thin plate connected between the support piece and the spacing support piece.
2. The optical pickup driving device in an optical information recording apparatus according to claim 1, comprising a focusing support plate, a tracking support plate, and the like.
にそれぞれ据え付けられ、前記フォーカシングコイルが
前記支持片の下部外周面に据え付けられていることを特
徴とする請求項第１項又は第２項記載の光学的情報記録
再生装置における光ピックアップ駆動装置。（４）前記
案内手段が滑り摩擦をおこす、少なくとも１本の案内棒
とこの案内捧が嵌入できるように前記フレームに設けら
れた少なくとも一つの案内孔からなることを特徴とする
請求項第１項記載の光学的情報記録再生装置における光
ピックアップ駆動装置。(3) The tracking coil is installed on the left and right side surfaces of the support piece, and the focusing coil is installed on the lower outer peripheral surface of the support piece. An optical pickup drive device in an optical information recording/reproducing device. (4) The guide means comprises at least one guide rod that causes sliding friction and at least one guide hole provided in the frame into which the guide bar can be inserted. An optical pickup drive device in the optical information recording/reproducing device described above.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1989-7013 | 1989-05-25 | ||
| KR1019890007013A KR920002933B1 (en) | 1989-05-25 | 1989-05-25 | Optical pick-up driving apparatus for recording system of optical information |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0317837A true JPH0317837A (en) | 1991-01-25 |
Family
ID=19286466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2135151A Pending JPH0317837A (en) | 1989-05-25 | 1990-05-24 | Optical pickup drive in optical information recorder |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH0317837A (en) |
| KR (1) | KR920002933B1 (en) |
| DE (1) | DE4016916A1 (en) |
| FR (1) | FR2648263A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69319965T2 (en) * | 1992-04-22 | 1998-12-17 | Canon Kk | Lens drive device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5911544A (en) * | 1982-07-09 | 1984-01-21 | Nippon Kogaku Kk <Nikon> | Optical head driving device |
| JPS60143450A (en) * | 1983-12-30 | 1985-07-29 | Asahi Optical Co Ltd | Objective supporting device of optical information recording and reproducing device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57122030U (en) * | 1981-01-26 | 1982-07-29 | ||
| US4504935A (en) * | 1983-02-14 | 1985-03-12 | U.S. Philips Corporation | Electrodynamic focus and radial slide drive for an optical disc system |
| USRE37084E1 (en) * | 1983-05-31 | 2001-03-06 | Matsushita Electric Industrial Co., Ltd. | Objective lens driving apparatus for optical disc player |
| JPS60155022U (en) * | 1984-03-21 | 1985-10-16 | パイオニア株式会社 | Optical system drive device in optical information reading device |
| JPS60253030A (en) * | 1984-05-29 | 1985-12-13 | Seiko Instr & Electronics Ltd | Objective lens driving device |
| JPS63257927A (en) * | 1987-04-15 | 1988-10-25 | Pioneer Electronic Corp | Pickup actuator |
-
1989
- 1989-05-25 KR KR1019890007013A patent/KR920002933B1/en not_active IP Right Cessation
-
1990
- 1990-05-23 FR FR9006428A patent/FR2648263A1/en active Pending
- 1990-05-24 JP JP2135151A patent/JPH0317837A/en active Pending
- 1990-05-25 DE DE4016916A patent/DE4016916A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5911544A (en) * | 1982-07-09 | 1984-01-21 | Nippon Kogaku Kk <Nikon> | Optical head driving device |
| JPS60143450A (en) * | 1983-12-30 | 1985-07-29 | Asahi Optical Co Ltd | Objective supporting device of optical information recording and reproducing device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR900018941A (en) | 1990-12-22 |
| FR2648263A1 (en) | 1990-12-14 |
| KR920002933B1 (en) | 1992-04-10 |
| DE4016916A1 (en) | 1990-11-29 |
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