JPS6028037A - Optical information reader - Google Patents
Optical information readerInfo
- Publication number
- JPS6028037A JPS6028037A JP13481683A JP13481683A JPS6028037A JP S6028037 A JPS6028037 A JP S6028037A JP 13481683 A JP13481683 A JP 13481683A JP 13481683 A JP13481683 A JP 13481683A JP S6028037 A JPS6028037 A JP S6028037A
- Authority
- JP
- Japan
- Prior art keywords
- focusing
- magnet
- coil
- yoke
- fulcrum shaft
- 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
Abstract
Description
【発明の詳細な説明】
く本発明の技術分野〉
に情報を読み取る光学的情報読取装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an optical information reading device for reading information.
〈背景技術〉
一般にこのような情報読取装置ではディスクに対して相
対的に駆動走査される際、内蔵の光ビーム操縦手段にト
ラッキング及びフォーカスエラー訂正信号を与えて常時
光ビームを情報トラック上の正規の位置に収束させるよ
う構成されている。<Background Art> In general, when such an information reading device drives and scans the disk relative to the disk, a tracking and focus error correction signal is given to the built-in optical beam steering means to constantly direct the optical beam to the normal position on the information track. It is configured to converge at the position of .
ところで、上記光ビームを操縦する手段としては、
■、発光素子回折格子、ビームヌプリッター、〆４波長
板、プリズム及び対物レンズ等を収容したケース全体を
トラッキング動作用コイルにトラッキングエラー訂正信
号を与えて動かすことによってラジアル方向の制御を実
行すると共にフォーカスの制御をフォーカス動作用コイ
ルにフォーカスエラー訂正信号を与えて上記対物レンズ
を上下動させることによって実行する方式のもの。By the way, as a means for controlling the above-mentioned light beam, (1) the entire case containing the light emitting element diffraction grating, the beam nuplitter, the final 4-wave plate, the prism, the objective lens, etc. is used to apply a tracking error correction signal to the tracking operation coil; The objective lens is controlled in the radial direction by moving the objective lens, and the focus is controlled by applying a focus error correction signal to a focusing coil to move the objective lens up and down.
或いは
■、■の改善方式として開発されたもので、特開昭５７
−２１０４５７号公報にも開示されているように対物レ
ンズの保持筒の外周にフォーカス動作用及びトラッキン
グ動作用のコイルを内外にして設けると共に上記保持筒
の内側及び外側にヨーク及びマグネットを設け、夫々の
コイルｌｃ７オーカス及びトラッキングエラー訂正信号
を与えて保持筒をヌラスト方向及びラジアル方向に動か
すことによってトラッキング及びフォーカシングを実行
する方式のもの。Alternatively, it was developed as an improvement method for
As disclosed in Japanese Patent No. 210457, coils for focusing and tracking operations are provided on the outer periphery of the holding tube of the objective lens, and yokes and magnets are provided on the inside and outside of the holding tube, respectively. This system performs tracking and focusing by applying a coil lc7 orcus and a tracking error correction signal to move the holding cylinder in the null direction and radial direction.
等が種々開発されている。etc. have been developed.
上記■の方式のものではフォーカス制御の機構が対物レ
ンズそのものを振動させるようにコイル、マグネット等
を対物レンズに組合せた構造となっているため、非常に
小さく組立、保守、点検が困難であるとの欠点を有して
いたのに対し、■の方式のものでは対物レンズを偏心し
て設けているレンズ保持筒の外周にフォーカス及びトラ
ッキング動作用のコイルを巻着するため、フォーカス系
の機構も比Ｗ大きく構成できる上に保持筒の回転と上下
動で対物レンズのスラストとラジアル方向の動きを得る
ことができる構造であるため全体としては■の方式のも
のに比べて小型化できるとの有利な点を持っている。In the method described in (■) above, the focus control mechanism has a structure in which coils, magnets, etc. are combined with the objective lens to vibrate the objective lens itself, so it is extremely small and difficult to assemble, maintain, and inspect. On the other hand, in the method (2), the focusing and tracking coils are wound around the outer periphery of the lens holding tube in which the objective lens is set eccentrically, so the focusing system mechanism is also different. The structure has the advantage that it can be made smaller overall than the method in (2) because it can be constructed with a large W and the thrust and radial movement of the objective lens can be obtained by the rotation and vertical movement of the holding cylinder. have points.
しかし乍ら、との■の方式のものでは各コイルの外側に
設けられるヨーク形状をフォーカス及びトラッキング動
作用コイルとの磁気回路を構成するため及び全体的な構
造上の拘束からリング状のヨーク取付部上に切欠部を残
すようにヨーク部を設ける必要があり、構造が複雑とな
って製作が困難であるとの欠点を有していた。However, in the case of method (■), a ring-shaped yoke is installed because the yoke shape provided on the outside of each coil constitutes a magnetic circuit with the focusing and tracking operation coils, and due to overall structural constraints. It is necessary to provide the yoke part so as to leave a notch on the yoke part, which has the drawback that the structure is complicated and manufacturing is difficult.
〈本発明の目的〉
本発明は上述のような従来装置の欠点に鑑みて発明され
たものであり、上述のようなヨーク構造特にフォーカス
動作用のヨークを極めて簡単な構成とすることにより製
作及び組立が容易な光学的情報読取装置を提供せんとす
るものである。<Objective of the present invention> The present invention was invented in view of the above-mentioned drawbacks of the conventional device, and it is possible to manufacture and manufacture the above-mentioned yoke structure, particularly the yoke for focus operation, by making it extremely simple. It is an object of the present invention to provide an optical information reading device that is easy to assemble.
〈本発明の構成〉
以下、本発明に係る光学的情報読取装置の一実施例を添
付図面に従って詳細に説明する。<Configuration of the Present Invention> Hereinafter, one embodiment of an optical information reading device according to the present invention will be described in detail with reference to the accompanying drawings.
添付図面の内、第１図乃至第３図は本発明に係る光学的
情報読取装置の一実施例の分解斜視図及び組立状態の斜
視図と平面図を示し、又、第４図は第３図のＩ−１’線
で切断して視た正面断面図を示している。Of the accompanying drawings, FIGS. 1 to 3 show an exploded perspective view, an assembled perspective view, and a plan view of one embodiment of the optical information reading device according to the present invention, and FIG. A front sectional view taken along line I-1' in the figure is shown.
そして、これらの図において、１は一側面を開放した光
学系支持穴２を有する装置本体にして、中央部に軸受穴
３と光通孔４を備えている上面の後縁部両脇にネジ穴６
を有する凸状の段部５を設け、かつ、前縁部中央に同様
の段部５を有する突部７を前方向けて突設している。In these figures, 1 is the main body of the device which has an optical system support hole 2 with one side open, and screws are installed on both sides of the rear edge of the upper surface, which has a bearing hole 3 and a light passage hole 4 in the center. hole 6
A convex step 5 having a similar step 5 is provided, and a protrusion 7 having a similar step 5 is provided at the center of the front edge to protrude forward.
９は光ビーム発生器にして、一般に周知のもので保持筒
１０に収容された発光素子（レーザーダイオード）１１
、回折格子１２．ビームスプリッタ−１３，コリメータ
レンズ１４，１７４波長板１５と上記保持筒１０の先端
にある支持片１０′の傾斜面１０″ 上に固着された光
ビーム光路変更手段としてのプリズム１６とより成り、
このプリズム１６が上記光通孔４の直下に位置するよう
に上記光学系支持穴２に収納されている。Reference numeral 9 denotes a light beam generator, which is generally known and includes a light emitting element (laser diode) 11 housed in a holding cylinder 10.
, diffraction grating 12. It consists of a beam splitter 13, collimator lenses 14, 174, a wavelength plate 15, and a prism 16 as a light beam path changing means fixed on the inclined surface 10'' of the support piece 10' at the tip of the holding cylinder 10,
This prism 16 is housed in the optical system support hole 2 so as to be located directly below the light passage hole 4.
１７は４分割フォトダイオード等から成る受光素子にし
て、上記装置本体１の前面に開口した支持穴８に嵌設さ
れ、その受光面を上記ビームスプリッター１３よシ反射
光ビームを受けるように上記光学系支持穴２内に臨ませ
ている。Reference numeral 17 denotes a light-receiving element consisting of a four-part photodiode or the like, which is fitted into a support hole 8 opened in the front face of the apparatus main body 1, and whose light-receiving surface is arranged to receive the reflected light beam from the beam splitter 13. It faces into the system support hole 2.
１８は上記装置本体１の底面に螺挿され先端を上記保持
筒の支持片１０′の下面に係合させた調整ネジにして、
該ネジ１８をドライバー等で回転させることにより支持
片１０’を第５図の如く上下に動かして上面に固定して
いる上記プリズム１６を上下動させ、該プリズム１６の
支持片１０’への固着面１６ｂが上記発光素子１１より
プリズム１６の反射面１６ａに至る光ビームＯの光軸と
平行になるように調整できるように成っている。18 is an adjustment screw screwed into the bottom surface of the device main body 1 and whose tip engages with the lower surface of the support piece 10' of the holding cylinder;
By rotating the screw 18 with a screwdriver or the like, the supporting piece 10' is moved up and down as shown in FIG. The surface 16b can be adjusted to be parallel to the optical axis of the light beam O that reaches the reflective surface 16a of the prism 16 from the light emitting element 11.
こ＼で、調整ネジ１８で調整できるようにしている理由
であるが、それは、上記プリズム１６の角度、４Ａ Ｂ
Ｃ（４５°）のバラツキ及び該プリズム１６の固着面
１６ｂと光ビームＯの光軸間の平行関係のずれを補正す
ることにある。This is why the adjustment screw 18 can be used to adjust the angle of the prism 16, 4A B.
The objective is to correct variations in C (45°) and deviations in the parallel relationship between the fixed surface 16b of the prism 16 and the optical axis of the light beam O.
即ち、プリズム１６は発光素子１１からの光ビ−ムの方
向を換えて後述する対物レンズの中心力に仕向は該対物
レンズより情報トラック上の正規の位置に垂直に光ビー
ムを集束させるために設けられ、いるが、よ記角度乙Ａ
ＢＣが、５・アな（たり或いは固着面１６ｂと光ビーム
０の光軸間の平行関係にずれがあれば上記対物レンズの
中心に光ビームの光軸を一致させることができない。That is, the prism 16 changes the direction of the light beam from the light emitting element 11 and directs it to the central force of the objective lens, which will be described later, in order to focus the light beam perpendicularly to a regular position on the information track from the objective lens. It is set up, but the angle B A is
If BC is 5.a, or if there is a deviation in the parallel relationship between the fixed surface 16b and the optical axis of the light beam 0, the optical axis of the light beam cannot be aligned with the center of the objective lens.
従来ではこの問題点を解決するためにプリズム及びその
支持片の加工精度を上げることによって対処していたが
、高度な加工技術を必要とし高価なものとなっていた。Conventionally, this problem has been solved by increasing the processing precision of the prism and its support piece, but this requires advanced processing technology and is expensive.
本発明はこの問題点を考慮して上述のように支持片１０
′の上面を傾斜面１０″ としてこの傾斜面１０“上に
プリズム１６を固着し、その上で、調整ネジ１８を操作
することによりプリズム１６の固着面１６ｂを光ビーム
の光軸に平行にし、対物レンズの中心に光ビームの光軸
を一致させるようにしている。In consideration of this problem, the present invention provides the supporting piece 10 as described above.
The upper surface of the prism 16 is fixed on the inclined surface 10'', and the fixed surface 16b of the prism 16 is made parallel to the optical axis of the light beam by operating the adjustment screw 18. The optical axis of the light beam is made to coincide with the center of the objective lens.
１９は上記各段部５間において上記装置本体１上に載置
された非磁性体よシ成る合板にして、板面中央に上記軸
受穴３及び光通孔４に夫々通じる軸穴２０と光通孔２１
を備えると共に前縁両端にネジ穴２２を有する受突起２
３を備え、かつ、両側縁に上面「＜」字の支持片２４を
立設している。Reference numeral 19 denotes a plywood board made of a non-magnetic material placed on the device main body 1 between the stepped portions 5, and a shaft hole 20 communicating with the bearing hole 3 and the light passage hole 4, respectively, in the center of the plate surface. Through hole 21
and a receiving projection 2 having screw holes 22 at both ends of the front edge.
3, and support pieces 24 with a "<" shape on the upper surface are erected on both side edges.
そして、これら支持片２４．２４の互いに対向する面に
は該支持片と略々同形同大のトラッキング動作用の外側
ヨーク２５が固着され、更に、これら外側ヨーク２５．
２５の互いに対向する而には夫々２ヶ宛トラッキング動
作用のマグネット２６が固着されている。An outer yoke 25 for tracking operation, which has approximately the same shape and size as the support pieces, is fixed to the surfaces of these support pieces 24 and 24 that face each other, and these outer yokes 25.
Magnets 26 for two-direction tracking operation are fixed to the mutually opposing portions of the magnets 25, respectively.
２７は板面中央に支点軸２９を垂直に貫通固定し、前部
に延在部２８を有する磁気回路系調整板（以下、第１の
調整板と言う）ン々、非磁性体又は磁性体よシ成シ延在
部２８と後縁部両脇に夫々円弧状の調整孔３０を有し、
上記台板１９の上面より上記装置本体１の段部５上に載
置され各調整孔３０を通してネジ穴６にネジ３１を螺入
することによって上記台板１９を挾むように装置本体１
上に固定される。Reference numeral 27 denotes a magnetic circuit adjustment plate (hereinafter referred to as the first adjustment plate) having a fulcrum shaft 29 perpendicularly fixed through the center of the plate surface and an extension portion 28 at the front, and is made of a non-magnetic or magnetic material. It has arc-shaped adjustment holes 30 on both sides of the horizontal extension part 28 and the rear edge, respectively.
The apparatus main body 1 is placed on the stepped portion 5 of the apparatus main body 1 from the upper surface of the base plate 19, and the screws 31 are inserted into the screw holes 6 through the adjustment holes 30, so that the base plate 19 is sandwiched between the apparatus main bodies 1 and 19.
fixed on top.
そして、この第１の調整板２７はこのように装置本体１
上に固定されることによって支点軸２９の下端を台板１
９の軸穴２０を通して装置本体１の軸受穴３に挿入させ
ると共に板面中央に設けた光通孔３２を上記各光通孔４
．２１に連通させている。The first adjusting plate 27 is arranged in the apparatus main body 1 in this way.
By being fixed on top of the base plate 1, the lower end of the fulcrum shaft 29
9 is inserted into the bearing hole 3 of the device body 1 through the shaft hole 20, and a light passage hole 32 provided at the center of the plate surface is inserted into each of the light passage holes 4.
．． It is connected to 21.
３３．３３は上記支点軸２９を前後して挾むように上記
第１の調整板２７上に固着されたフォーカス動作用の内
側ヨークで、これら両ヨーク３３゜３３間の第１の調整
板２７上に上記光通孔３２が設けられている。Reference numeral 33.33 denotes an inner yoke for focus operation fixed on the first adjustment plate 27 so as to sandwich the fulcrum shaft 29 back and forth. The light passage hole 32 is provided.
３４は上記内側ヨーク３３を囲むように上記第１の調整
板２７の上面に固着されたフォーカス動作用のリングマ
グネットにして、その上面にフォーカス動作用のリング
状の外側ヨーク３５を固着している。Reference numeral 34 denotes a ring magnet for focus operation fixed to the upper surface of the first adjustment plate 27 so as to surround the inner yoke 33, and a ring-shaped outer yoke 35 for focus operation is fixed to the upper surface of the ring magnet. .
３６は円弧状の板材より成るトラッキング動作上記リン
グマグネット３４と外側ヨーク３５の外周に固着されて
いる。36 is fixed to the outer periphery of the tracking ring magnet 34 and the outer yoke 35 made of an arcuate plate.
−ゝ ′ −
要するに、フォーカス動作用の内側ヨーク３３゜リング
マグネット３４．外側ヨーク３５及びトラッキング動作
用の内側ヨーク３６が上記第１の調整板２７に固定され
ている。−ゝ ′ − In short, the inner yoke 33° ring magnet 34 for focusing operation. An outer yoke 35 and an inner yoke 36 for tracking operation are fixed to the first adjusting plate 27.
３７は両端に円弧状の支持片３８を下方向けて設けたレ
ンズ保持アームにして、板面中央に上記支点軸２９に回
転及び上下動（ヌラスト方向の移動）可能に挿通するた
めの軸挿口３９を有している。そして、該軸挿口３９を
挾むように該口３９の一方の外側に対物レンズ４０を保
持する保持口４１を備えると共に他方の外側におもり４
２を固着している。Reference numeral 37 designates a lens holding arm with arc-shaped supporting pieces 38 facing downward at both ends, and a shaft insertion hole in the center of the plate surface for inserting the lens holding arm into the fulcrum shaft 29 so as to be rotatable and vertically movable (moveable in the null direction). It has 39. A holding opening 41 for holding an objective lens 40 is provided on one outside of the opening 39 so as to sandwich the shaft insertion opening 39, and a weight 4 is provided on the other outside.
2 is fixed.
又、このレンズ保持アーム−′３７はその下面に円筒状
のポビン４３を一体的に設けていて、上記軸挿口３９を
以って上記支点軸２９に挿通支持されることにより、該
ボビン４３を上記内側ヨーク３３とリングマグネット３
４（外側ヨーク３５）間に垂下させている。Further, this lens holding arm 37 is integrally provided with a cylindrical bobbin 43 on its lower surface, and by being inserted and supported by the fulcrum shaft 29 through the shaft insertion port 39, the bobbin 43 The above inner yoke 33 and ring magnet 3
4 (outer yoke 35).
このボビン４３はその外周にフォーカス動作用のコイ）
ｖ４４を巻着していて、上記内側ヨーク３３、リングマ
グネット３４及び外側ヨーク３５と共にレンズ保持アー
ムをヌラ、Ｘト方向に動かす、即ち、フォーカス調整の
ための第１のモータ構造を形成している。This bobbin 43 has a coil for focus operation on its outer periphery)
V44 is wound around it, and together with the inner yoke 33, ring magnet 34, and outer yoke 35, it forms a first motor structure for moving the lens holding arm in the null and X directions, that is, for focus adjustment. .
又、上記アーム３７は上記支持片３８の外面にトラッキ
ング動作用コイ）ｖ４５を取着し、上記外側ヨーク２５
、マグネット２６、及び内側ヨーク３６と共にレンズ保
持アームをラジアル方向に動かす、即ち、トラッキング
調整のだめの第２のモータを形成している。Further, the arm 37 has a tracking operation coil (v45) attached to the outer surface of the support piece 38, and the outer yoke 25
, magnet 26, and inner yoke 36 form a second motor for moving the lens holding arm in the radial direction, that is, for tracking adjustment.
４６はレンズラジアル方向調整板（以下第２の調整板と
言う）にして、両端部に調整孔４７を有すると共に前縁
中央に上面に枢支軸４９を備えた折返片４８を有し、そ
して、上記台板１９上の受突起２３上に載置されると共
にネジ５０を調整孔４７を通してネジ穴２２に螺入する
ことによって受突起２３上に固定され又、ネジ５０を緩
めることにより支点軸２９と直交する方向にヌライドで
きる。Reference numeral 46 designates a lens radial direction adjustment plate (hereinafter referred to as a second adjustment plate), which has adjustment holes 47 at both ends and a folded piece 48 having a pivot shaft 49 on the upper surface at the center of the front edge. , is placed on the receiving projection 23 on the base plate 19, and is fixed on the receiving projection 23 by screwing the screw 50 into the screw hole 22 through the adjustment hole 47, and by loosening the screw 50, the fulcrum shaft is fixed. Nuride can be performed in the direction perpendicular to 29.
５１は上記第２の調整板４６の枢支軸４９に挿口５２を
以って枢支され止具５３にて抜止めされたゴム材より成
る中立保持具にして、その後縁部を以って上記レンズ保
持アーム３７の前縁に固着されている。Reference numeral 51 denotes a neutral holder made of a rubber material which is pivotally supported on the pivot shaft 49 of the second adjusting plate 46 through an insertion hole 52 and is prevented from coming off with a stopper 53. and is fixed to the front edge of the lens holding arm 37.
このように中立保持具５１の後縁部を上記レンズ保持ア
ーム３７の前縁に固着することにより、該レンズ保持ア
ーム３７が支点軸２９の軸方向において受台１９上に浮
いた状態を取り、その結果フォーカス動作用及びトラッ
キング動作用のコイ／Ｌｙ４４，４５を夫々対応する内
、外側ヨークとマグネットに磁気的に結合し、各コイ／
Ｌ’４４．４５に与えられる信号によってアーム３７を
回動及びスラスト方向への移動ができる状態にしている
。By fixing the rear edge of the neutral holder 51 to the front edge of the lens holding arm 37 in this way, the lens holding arm 37 takes a floating state above the pedestal 19 in the axial direction of the fulcrum shaft 29. As a result, the coils/Ly44 and Ly45 for focus operation and tracking operation are magnetically coupled to the corresponding inner and outer yokes and magnets, respectively.
The arm 37 can be rotated and moved in the thrust direction by the signals given to L'44.45.
〈本発明の作用〉
本発明は紙上の計１うに構成されるものであるから、次
にその作用について説明する。<Operation of the present invention> Since the present invention is configured as shown on paper, its operation will be explained next.
尚、上述のように構成される本発明の光学的情報読取装
置はその全体がプレーヤ本体内において第３図中矢印Ａ
、Ｂ方向に駆動モータにてヌライドされ、又、上記フォ
ーカス動作用コイ／ｌ／４４及びトラッキング動作用コ
イル４５は図示しないフォーカスサーボ回路及びトラッ
キングサーボ回路に接続されていて、夫々サーボ信号を
得るように成っている。It should be noted that the optical information reading device of the present invention configured as described above is entirely located within the player body as shown by the arrow A in FIG.
, B direction by a drive motor, and the focus operation coil/l/44 and tracking operation coil 45 are connected to a focus servo circuit and a tracking servo circuit (not shown) so as to obtain servo signals, respectively. It consists of
さて、プレーヤが再生状態にあると、光ビーム発生器９
の発光素子１１より出力された光ビーム０は回折格子１
２．ビームスプリッター１３、コリメータレンズ１４．
１／４波長板１５を経てプリズム１６の反射面１６ａに
当り、と＼で光路を変更されて光通孔４．２１，３２、
内側ヨーク３３゜３３間を経て対物レンズ４０に進み、
該レンズ４０によりディスクＤの情報トラック上に収束
される。Now, when the player is in the playback state, the light beam generator 9
The light beam 0 outputted from the light emitting element 11 of the diffraction grating 1
2. Beam splitter 13, collimator lens 14.
After passing through the quarter-wave plate 15 and hitting the reflective surface 16a of the prism 16, the optical path is changed at
After passing through the inner yoke 33° and 33, it advances to the objective lens 40,
The lens 40 focuses the light onto the information track of the disk D.
そして、このディスクＤより反射された情報成分を含む
反射光ビームは逆に、対物レンズ４０から各光通孔４
＊ ２％’ ３２を経てプリズム１６の反射面１６ａに
至り、と＼で光路を変更された後、’／４ 波長板１５
、コリークレンス゛１４を経て上記ビームスプリッタ−
１３に至って反射され受光素子１７上の受光面に照射さ
れる。Then, the reflected light beam containing the information component reflected from this disk D is conversely transmitted from the objective lens 40 to each light passage hole 4.
* After passing through 2%' 32 and reaching the reflective surface 16a of the prism 16, the optical path is changed at '/4 wavelength plate 15
, the beam splitter via the Collie lens 14
13 and is reflected onto the light receiving surface of the light receiving element 17.
以上のように、発光素子１１より出力された光ビームが
ディスクＤの情報トラック上で反射されて情報を含んだ
状態で受光素子１７に受光されるが、この受光素子１７
での受光状態に応じて上記フォーカスサーボ回路及びト
ラッキングサーボ回路が動作してフォーカス及びトラッ
キングエラーを訂正するフォーカス及びトラッキングエ
ラー訂正信号を上記コイ１Ｌｚ４４，４５に与える。As described above, the light beam output from the light emitting element 11 is reflected on the information track of the disk D and is received by the light receiving element 17 in a state containing information.
The focus servo circuit and the tracking servo circuit operate according to the light reception state at the coil 1Lz44, 45 to provide focus and tracking error correction signals for correcting focus and tracking errors.
上記フォーカス動作用コイル４４に上記フォーカスエラ
ー訂正信号が与えられると、斯るコイル４４と内及び外
側ヨーク３３．３５、リングマグネット３４より成る第
１のモータが作動しレンズ保持アーム３７を中立保持具
５１の弾力性に抗して対物レンズ４０共々支点軸２９に
沿ってスラスト方向に上下動させ最適焦点を得させる。When the focus error correction signal is applied to the focus operation coil 44, the first motor consisting of the coil 44, inner and outer yokes 33, 35, and ring magnet 34 is activated to move the lens holding arm 37 to the neutral holding device. The objective lens 40 is moved up and down in the thrust direction along the fulcrum shaft 29 against the elasticity of the lens 51 to obtain the optimum focus.
又、上記トラッキング動作用コイ）ｖ４５に上記トラツ
キングエラー訂正信号が与えられると、斯るコイル４５
と、内及び外側ヨーク３６，２５、マグネット２６より
成る第２のモータが作動しレンズ保持アーム３７を上記
中立保持具５１の弾力性に抗して対物レンズ４０共々支
点軸２９を中心に回転させ、即ち、フジアｌし方向に移
動させ対物レンズ４０による光ビームの収束点を情報ト
ラック上に位置させる。Further, when the tracking error correction signal is given to the tracking operation coil v45, the coil 45
Then, the second motor consisting of the inner and outer yokes 36, 25 and the magnet 26 operates to rotate the lens holding arm 37 together with the objective lens 40 around the fulcrum shaft 29 against the elasticity of the neutral holder 51. That is, the convergence point of the light beam by the objective lens 40 is positioned on the information track by moving in the direction toward the edge.
本発明による光学的情報読取装置は上述のようにプレー
ヤの駆動中動作するが、対物レンズ４０よりディスクＤ
上に収束される光ビームの入射角度が情報トラックの接
線方向に対して垂直に照射されていない時には調整ネジ
１８を左又は右方向に回転して調整するとよい。即ち、
調整ネジ１８を左又は右に回転すると、支持片１０′
を介してプリズム１６が上下動させ斯るプリズム１６の
固着面１６ｂを発光素子１１より反射面１６ａに至る光
ビームの光軸に対して平行になるように調整すると対物
レンズの中心に光ビームの光軸が一致し、光ビームが情
崎、上ラックの接線方向に対して垂直に照射されること
！なる。The optical information reading device according to the present invention operates while the player is being driven as described above.
When the incident angle of the upwardly focused light beam is not perpendicular to the tangential direction of the information track, it is preferable to adjust it by rotating the adjustment screw 18 to the left or right. That is,
When the adjustment screw 18 is rotated to the left or right, the support piece 10'
When the prism 16 is moved up and down through the prism 16 and the fixed surface 16b of the prism 16 is adjusted to be parallel to the optical axis of the light beam from the light emitting element 11 to the reflection surface 16a, the light beam is centered on the objective lens. The optical axes should match and the light beam should be irradiated perpendicular to the tangential direction of the upper rack! Become.
又、レンズ保持アーム３７上のトラッキング動作用コイ
／Ｉ／４５に対して対応する内、外側ヨーク３６．２５
及びマグネット２６の位置関係を調整する場合にはネジ
３１を緩めて第１の調整板２７と受台１９を動かしてマ
グネット２６の磁束中心にコイ／Ｌ／ ４５ ＋内側ヨ
ーク３６を位置させて実行すると良い。In addition, the inner and outer yokes 36 and 25 correspond to the tracking operation coil/I/45 on the lens holding arm 37.
When adjusting the positional relationship of the magnet 26, loosen the screw 31 and move the first adjustment plate 27 and pedestal 19 to position the coil/L/45 + inner yoke 36 at the center of the magnetic flux of the magnet 26. That's good.
又、上記対物レンズ４ｏのラジアル方向での位置合わせ
をする場合にはネジ５ｏを緩めて第２の調整板４６を受
台１９上で動がし、中立保持具５１を介゛してレンズ保
持アーム３７をラジアル方向に回転させて実行するとよ
い。In addition, when aligning the objective lens 4o in the radial direction, loosen the screw 5o and move the second adjusting plate 46 on the pedestal 19 to hold the lens via the neutral holder 51. It is preferable to perform this by rotating the arm 37 in the radial direction.
この対物レンズ４０の位置合わせと上記トラッキング動
作用コイル４５マグネツト２６等の位置合わせをするこ
とにょシ、光ビームの光軸と対物レンズの中心との一致
が計れ、又、レンズ保持アーム３７のトラッキング動作
用コイ）ｖ ４５ ＋内側−ヨーク３６等とトラッキン
グ動作用のマグネット° ２６の磁束中心と（７）、−
Ｆｉが計れ、その結果、対物レンズをラジアル方向に安
定した状態で動かすことができると共にディヌクの情報
トラック上に適正な光ビームの収束点を得ることができ
る。By aligning the objective lens 40 and the tracking operation coil 45 magnet 26, etc., the optical axis of the light beam and the center of the objective lens can be aligned, and the lens holding arm 37 can be tracked. Coil for operation) v 45 + inside - yoke 36 etc. and magnetic flux center of magnet ° 26 for tracking operation and (7), -
Fi can be measured, and as a result, the objective lens can be stably moved in the radial direction, and an appropriate convergence point of the light beam can be obtained on the Dinuk information track.
〈本発明の効果〉
本発明は紙上のように構成されるものであるから、フォ
ーカス動作用の外側ヨークをリング状に形成でき、従っ
て、ヨーク構造が簡単になって製作及び組立が簡単にな
る優れた発明である。<Effects of the Present Invention> Since the present invention is configured as shown on paper, the outer yoke for focusing operation can be formed into a ring shape, and therefore the yoke structure is simplified and manufacturing and assembly are simplified. This is an excellent invention.
第１図は本発明に係る光学的情報読取装置の一実施例の
分解斜視図、第２図及び第３図は同上装置の組立状態の
斜視図及び平面図、第４図は第３図をＩ−Ｉ’線で切断
して視た断面図、第５図は第４図の要部拡大断面図であ
る。
２９：支点軸、３７：レンズ保持アーム、３４：フォー
カス動作用のリングマグネット、３５：外側ヨーク、
４３：ボビン、 ４４：フォーカス動作用コイル。FIG. 1 is an exploded perspective view of an embodiment of the optical information reading device according to the present invention, FIGS. 2 and 3 are a perspective view and a plan view of the same device in an assembled state, and FIG. 4 is the same as FIG. 3. FIG. 5 is a sectional view taken along the line II', and FIG. 5 is an enlarged sectional view of the main part of FIG. 4. 29: Fulcrum shaft, 37: Lens holding arm, 34: Ring magnet for focus operation, 35: Outer yoke,
43: Bobbin, 44: Focus operation coil.
Claims (1)
ラヌト方向にスライド可能に構成され下面に上記支点軸
と同心の円筒状のボビンを設けたレンズ保持アームと、
上記ボビンの全外周に固着して設けたフォーカス動作用
コイルと、上記ボビンの内側に設けられたフォーカス動
作用の内側ヨークと、上記ボビンの外側において上記フ
ォーカス動作用コイルの周囲を被うように設けられたリ
ング状のマグネットと、該マグネット上に設けられたリ
ング状のフォーカス動作用の外側ヨークとを備えて成る
光学的情報読取装置。1. A lens holding arm configured to be rotatable around a fulcrum shaft and slidable in a null direction of the fulcrum shaft, and having a cylindrical bobbin concentric with the fulcrum shaft provided on the lower surface;
A focus operation coil fixed to the entire outer circumference of the bobbin, an inner yoke for focus operation provided inside the bobbin, and a focus operation coil provided outside the bobbin so as to cover the circumference of the focus operation coil. An optical information reading device comprising a ring-shaped magnet and a ring-shaped outer yoke for focusing operation provided on the magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13481683A JPS6028037A (en) | 1983-07-22 | 1983-07-22 | Optical information reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13481683A JPS6028037A (en) | 1983-07-22 | 1983-07-22 | Optical information reader |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6028037A true JPS6028037A (en) | 1985-02-13 |
| JPH0519209B2 JPH0519209B2 (en) | 1993-03-16 |
Family
ID=15137154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13481683A Granted JPS6028037A (en) | 1983-07-22 | 1983-07-22 | Optical information reader |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6028037A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6263828U (en) * | 1985-10-09 | 1987-04-21 | ||
| JPS62109237A (en) * | 1985-11-08 | 1987-05-20 | Canon Inc | Optical head device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57210457A (en) * | 1981-06-22 | 1982-12-24 | Sony Corp | Objective lense device |
-
1983
- 1983-07-22 JP JP13481683A patent/JPS6028037A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57210457A (en) * | 1981-06-22 | 1982-12-24 | Sony Corp | Objective lense device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6263828U (en) * | 1985-10-09 | 1987-04-21 | ||
| JPS62109237A (en) * | 1985-11-08 | 1987-05-20 | Canon Inc | Optical head device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0519209B2 (en) | 1993-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0225564A2 (en) | Optical head | |
| KR100232915B1 (en) | An optical head unit for use in an information read/write apparatus | |
| JPS6028037A (en) | Optical information reader | |
| JPS6028040A (en) | Optical information reader | |
| JPS6028041A (en) | Optical information reader | |
| JPH01171129A (en) | Optical head and tracking method | |
| JPS6028031A (en) | Optical information reader | |
| JPS6028038A (en) | Optical information reader | |
| JPS58133640A (en) | Two-dimensional drive device | |
| JPS6028039A (en) | Optical information reader | |
| JP2782014B2 (en) | Optical device for optical disk | |
| JP4135244B2 (en) | Optical pickup device, adjustment method thereof, and optical disc recording and / or reproducing device | |
| JPH0227385Y2 (en) | ||
| JPS63152027A (en) | Optical pickup device | |
| JPS634268Y2 (en) | ||
| JPH0685228B2 (en) | Disk player optical head device | |
| JPS61269238A (en) | Optical information processor | |
| JPH1091987A (en) | Optical pickup and optical disk device | |
| JPH06101122B2 (en) | Optical axis adjustment method for optical components | |
| JPH05128540A (en) | Optical disk device | |
| JPH05189791A (en) | Separate type optical pickup device | |
| JPH103690A (en) | Optical pickup | |
| JPH1011793A (en) | Optical pickup and optical disk device | |
| JPH05242487A (en) | Pickup for driving optical system integrally | |
| JPH0944891A (en) | Optical pickup device |