JPH0140407B2 - - Google Patents
Info
- Publication number
- JPH0140407B2 JPH0140407B2 JP57064340A JP6434082A JPH0140407B2 JP H0140407 B2 JPH0140407 B2 JP H0140407B2 JP 57064340 A JP57064340 A JP 57064340A JP 6434082 A JP6434082 A JP 6434082A JP H0140407 B2 JPH0140407 B2 JP H0140407B2
- Authority
- JP
- Japan
- Prior art keywords
- holding member
- coils
- objective lens
- elastic
- disk
- 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.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 239000013598 vector Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000004804 winding Methods 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
- 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
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Description
【発明の詳細な説明】
本発明は、円盤状デイスク形状をなす記録媒体
に高密度なデジタル信号を記録させた情報トラツ
クに光スポツトを投影させて光学的に情報を読み
とる方式の再生装置において、情報トラツクの信
号に対して光スポツトの位置を正確に補正制御す
るために、対物レンズの位置をデイスク面に対し
て相対的に制御する対物レンズ駆動装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a reproducing apparatus that optically reads information by projecting a light spot onto an information track in which a high-density digital signal is recorded on a disc-shaped recording medium. The present invention relates to an objective lens driving device that controls the position of an objective lens relative to a disk surface in order to accurately correct and control the position of a light spot with respect to an information track signal.
より詳しくは、たとえばデイスクの回転中心に
対する情報トラツクの偏心量、すなわちデイスク
の径方向の相対的位置ズレを補正するトラツキン
グ制御と、デイスク自体のソリ、及びデイスクの
回転運動に併い相対的に発生するデイスク面の振
れに対して対物レンズと情報トラツク位置との距
離を制御するフオーカス制御とを行なうものであ
る。 More specifically, for example, tracking control corrects the eccentricity of the information track with respect to the center of rotation of the disk, that is, the relative positional deviation in the radial direction of the disk, and the warpage of the disk itself and the relative deviation caused by the rotational movement of the disk. Focus control is performed to control the distance between the objective lens and the information track position in response to the vibration of the disk surface.
一般にこの種の光方式情報読取り装置は、ビデ
オ信号を記録したビデオデイスク、及び符号化さ
れたオーデイオ信号を記録したデイジタルオーデ
イオデイスクに採用されるとともに、その他コン
ピユータ関係等の高密度情報記録再生装置に応用
されている。 Generally, this type of optical information reading device is used in video disks that record video signals and digital audio disks that record encoded audio signals, as well as in other high-density information recording and reproducing devices such as those related to computers. It is applied.
これは、符号化されたビデオ信号や音声信号や
種々の情報を、デイスク上に情報トラツクとして
記録しておき、このデイスクを高速に回転させな
がら、レーザー光線などの光源より放射された光
をデイスク上の情報トラツクに集束させ、デイス
ク面よりの反射光を読み取ることにより、記録さ
れた元の情報を再生するものである。 This involves recording encoded video signals, audio signals, and various other information on a disk as information tracks, and then rotating the disk at high speed while directing light emitted from a light source such as a laser beam onto the disk. The original recorded information is reproduced by focusing the light onto the information track of the disk and reading the reflected light from the disk surface.
この光方式情報読取り装置は、情報の記録密度
をきわめて高密度にすることができ、従来のアナ
ログ方式に比べて高密度で、高精度で、高性能な
記録ができるという特長を有する。 This optical information reading device can record information at an extremely high density, and has the advantage of being able to record information at a higher density, with higher accuracy, and with higher performance than conventional analog systems.
反面、情報トラツクの幅、及びピツチがきわめ
て小さいため、この高密度な情報を忠実に再生す
るためには、読みとりのための光スポツトの集束
径もきわめて小さなものにしなければならず、し
たがつてデイスクの情報トラツクに対して、光ス
ポツトを正確に追従させるためには、対物レンズ
を正確に駆動してデイスクとの相対的な位置ズレ
が生じないように制御しなければならないという
問題がある。 On the other hand, since the width and pitch of the information track are extremely small, in order to faithfully reproduce this high-density information, the focusing diameter of the light spot for reading must also be extremely small. In order for the light spot to accurately follow the information track on the disk, there is a problem in that the objective lens must be accurately driven and controlled so that no relative positional deviation with the disk occurs.
この問題を解決するために従来から、デイスク
面からの反射光を電気的に検出し、読み取り光ス
ポツト位置を情報トラツク位置に合致させるよう
制御することが行われている。 In order to solve this problem, conventional methods have been used to electrically detect the reflected light from the disk surface and control the reading light spot position to match the information track position.
その一例として、レーザー光線と対物レンズと
の間にある光路に回動可能なミラーを置き、トラ
ツキング誤差信号の情報をもとにして、このミラ
ーを回動させて制御する方法がある。しかしこの
方法では対物レンズ内の光軸に常にある傾斜角が
発生し、高精度な再生が望めない欠点がある。 One example is a method in which a rotatable mirror is placed in the optical path between the laser beam and the objective lens, and the mirror is rotated and controlled based on the information of the tracking error signal. However, this method has the drawback that a certain inclination angle always occurs in the optical axis within the objective lens, and highly accurate reproduction cannot be expected.
また、他の例として、対物レンズまたはその保
持枠を板バネよりなる弾性支持部材により支持
し、トラツキング誤差信号に従つて対物レンズを
デイスク面に対して平行に変位させてトラツキン
グ制御を行ない、さらにこれら弾性支持部材、対
物レンズ、及びトラツキング制御用の駆動装置を
有する装置全体を別の弾性支持部材で支持し、こ
れをフオーカス制御用の駆動装置(例えばスピー
カに一般的に用いられているボイスコイルと等価
なもの)を用いてデイスク面に垂直な方向に対物
レンズを駆動し、フオーカスを制御する方法が提
案されている。ところがこの方法は、トラツキン
グ制御とフオーカス制御がそれぞれ別個の電磁装
置によつて行なわれるから、構成が複雑になり、
重量も大きくなつて高い周波数での応答が悪くな
るという問題がある。しかも対物レンズにトラツ
キング制御用の弾性部材を設け、この弾性部材を
含めてフオーカス方向に駆動するため、前記弾性
部材がトラツキング方向に傾斜している状態で対
物レンズと弾性部材の弾性作用によつてレンズの
フオーカス方向への移動に時間的、位相的なずれ
が生じ、正確なフオーカス制御ができないという
問題がある。 As another example, the objective lens or its holding frame is supported by an elastic support member made of a leaf spring, and tracking control is performed by displacing the objective lens parallel to the disk surface according to a tracking error signal. The entire device including the elastic support member, the objective lens, and the drive device for tracking control is supported by another elastic support member, and this is connected to the drive device for focus control (for example, a voice coil commonly used in speakers). A method has been proposed in which the focus is controlled by driving the objective lens in a direction perpendicular to the disk surface. However, in this method, tracking control and focus control are performed by separate electromagnetic devices, so the configuration is complicated.
There is also a problem that the weight increases and the response at high frequencies deteriorates. Moreover, the objective lens is provided with an elastic member for tracking control, and since the elastic member including this elastic member is driven in the focus direction, when the elastic member is inclined in the tracking direction, the elastic action of the objective lens and the elastic member is used. There is a problem in that a temporal and phase shift occurs in the movement of the lens in the focus direction, making accurate focus control impossible.
本発明はこれらの欠点を除去し、トラツキング
方向及び、フオーカス方向に対して対物レンズを
より正確に制御することができ、いずれの方向に
対しても動作の直線性(リニアリテイー)が良く
構造が簡単で、かつ軽量な対物レンズ駆動装置を
提供するものである。 The present invention eliminates these drawbacks, enables more accurate control of the objective lens in the tracking direction and the focus direction, has good linearity of operation in both directions, and has a simple structure. The present invention provides a lightweight objective lens driving device.
以下、本発明の詳細を図面を参照して説明す
る。 Hereinafter, details of the present invention will be explained with reference to the drawings.
第1図は本発明の対物レンズを駆動させる駆動
力を得るための原理を示すものである。一定の空
間を置いて同軸上に配置された2つの永久磁石1
と2は、第1図に示す通り同軸上に互に逆方向に
着磁されており、それぞれコ字状に形成された磁
性材ヨーク3,4によりそれぞれ磁気ギヤツプを
形成している。一方可動部には、一定の角度を有
してコイル5,6が互いにクロスする様に巻装さ
れている。前述した2つの磁気ギヤツプは、2つ
のコイル5,6がクロス状態となる部分に対し対
称的に配置されている。第2図は駆動力の方向を
説明する図である。簡単のためコイルがクロス状
態となる一方向のみの説明をする。今、コイル5
とコイル6にある方向の電流を流した場合、ベク
トルa→及びb→なる方向に力が発生し、その合成力
はV→となる。また、コイル5の電流の方向のみを
逆にした場合にはコイル5によるベクトルc→とコ
イル6によるベクトルb→によりその合成ベクトル
はH→となる。即ち、コイル5とコイル6の電流の
方向を制御することにより垂直方向、及び水平方
向の任意な方向に可動部を動かすことが可能とな
るのである。 FIG. 1 shows the principle for obtaining the driving force for driving the objective lens of the present invention. Two permanent magnets 1 coaxially arranged with a certain space between them
and 2 are coaxially magnetized in opposite directions as shown in FIG. 1, and form a magnetic gap with magnetic material yokes 3 and 4 each formed in a U-shape. On the other hand, coils 5 and 6 are wound around the movable part so as to cross each other at a certain angle. The two magnetic gaps mentioned above are arranged symmetrically with respect to the area where the two coils 5 and 6 cross. FIG. 2 is a diagram illustrating the direction of the driving force. For the sake of simplicity, only one direction in which the coils are in a crossed state will be explained. Now coil 5
When a current in a certain direction is passed through the coil 6, forces are generated in the directions of vectors a→ and b→, and the resultant force is V→. Furthermore, when only the direction of the current in the coil 5 is reversed, the vector c→ caused by the coil 5 and the vector b→ caused by the coil 6 result in a combined vector of H→. That is, by controlling the direction of the current flowing through the coils 5 and 6, it is possible to move the movable part in any vertical or horizontal direction.
第3図、第4図は本発明の一実施例を示すもの
で、トラツキング方向とフオーカス方向の2次元
の対物レンズ駆動装置を示す。 FIGS. 3 and 4 show an embodiment of the present invention, and show a two-dimensional objective lens drive device in the tracking direction and the focus direction.
光信号が通過する対物レンズ7はコイル巻枠を
兼ねた保持部材8の中心穴8aに固定されてい
る。この保持部材8は、軽量でかつ強固な材料即
ち、アルミ、マグネシウム等の軽金属又はカーボ
ンワアイバー、ガラス等の強化剤を含んだ強化プ
ラスチツク等で形成されており、第3図に示すよ
うに支持部材との結合用突起部9,10を有する
ものである。この保持部材8の外周部には対物レ
ンズ7の光軸をつつみ、かつ光軸を避ける部分に
互いに一定角度を有して対称的に2つのコイル
5,6が巻装されている。 An objective lens 7 through which an optical signal passes is fixed in a center hole 8a of a holding member 8 which also serves as a coil winding frame. The holding member 8 is made of a lightweight and strong material, such as a light metal such as aluminum or magnesium, or a reinforced plastic containing a reinforcing agent such as carbon wire or glass, and is supported as shown in FIG. It has protrusions 9 and 10 for coupling with other members. Two coils 5 and 6 are wound symmetrically around the outer circumferential portion of the holding member 8 so as to surround the optical axis of the objective lens 7 and avoid the optical axis at a certain angle to each other.
上記結合用突起部9,10の先端部には2次元
移動規制用の支持部材11,12が結合される。 Support members 11 and 12 for regulating two-dimensional movement are coupled to the distal ends of the coupling protrusions 9 and 10.
支持部材11は、一対の弾性面13,14と一
体の剛体面15,16からなる平行四辺形の枠状
体と、一対の弾性面17,18と一対の剛体面1
5,19からなる平行四辺形の枠状体とを連結し
たもので構成されている。支持部材12も同様に
構成されている。すなわち、これらの支持部材1
1,12は、隣接する弾性面13,17及び1
4,18がほぼ90度になるように形成された2連
ばねで構成されている。 The support member 11 includes a parallelogram frame-shaped body consisting of a pair of elastic surfaces 13 and 14 and integral rigid surfaces 15 and 16, a pair of elastic surfaces 17 and 18, and a pair of rigid surfaces 1.
It is constructed by connecting parallelogram frame-like bodies consisting of 5 and 19 pieces. The support member 12 is similarly configured. That is, these supporting members 1
1 and 12 are adjacent elastic surfaces 13 and 17 and 1
It consists of two springs formed so that the angles 4 and 18 are at approximately 90 degrees.
これらの支持部材11,12は、剛体面16,
16を保持部材8の結合用突起部9,10に結合
し、剛体面19,19を外ケース21に固着する
ことによつて、保持部材8を外ケース21内に可
動自在に支持する。 These support members 11, 12 have rigid surfaces 16,
16 to the coupling protrusions 9 and 10 of the holding member 8, and by fixing the rigid surfaces 19 and 19 to the outer case 21, the holding member 8 is movably supported within the outer case 21.
磁気回路は、磁性材よりなるコ字状のヨーク2
2,23の一端22a,23a、第4図に示すよ
うに同軸で逆方向に着磁したマグネツト24,2
5を固着し、かつヨーク22,23の他軸22
b,23bを保持部材8の貫通孔8b,8bに遊
嵌し、上記マグネツト24,25をコイル5,6
のクロスする部分に対し、所定のギヤツプをあけ
て対向させることによつて構成されており、この
状態でヨーク22,23がビス26,27により
外ケース21に固着されている。 The magnetic circuit consists of a U-shaped yoke 2 made of magnetic material.
One end 22a, 23a of 2, 23, magnets 24, 2 coaxially magnetized in opposite directions as shown in FIG.
5 is fixed, and the other shaft 22 of the yokes 22, 23
b, 23b are loosely fitted into the through holes 8b, 8b of the holding member 8, and the magnets 24, 25 are inserted into the coils 5, 6.
The yokes 22 and 23 are fixed to the outer case 21 with screws 26 and 27 in this state.
このようにすれば、コイル5,6に所定の電流
を流すことにより、第2図に示した動作原理によ
つて保持部材8がトラツキング方向、フオーカス
方向に駆動される。このとき支持部材11,12
は各平行四辺形を構成する剛体面15,16,1
9が、保持部材8、外ケース21に対して垂直度
を保ちつつ、弾性面13,14,17,18の弾
性作用により第3図に示すトラツキングT方向及
びフオーカスF方向に動くことになる。このため
共通の支持部材11,12を用いて保持部材8を
トラツキングTとフオーカスFの2軸方向に動か
すことができ、しかもその移動時に対物レンズ7
の光軸が傾くこともない。 In this way, by passing a predetermined current through the coils 5 and 6, the holding member 8 is driven in the tracking direction and the focusing direction according to the operating principle shown in FIG. At this time, supporting members 11, 12
are rigid surfaces 15, 16, 1 constituting each parallelogram
9 moves in the tracking T direction and the focusing F direction shown in FIG. 3 by the elastic action of the elastic surfaces 13, 14, 17, and 18 while maintaining verticality with respect to the holding member 8 and the outer case 21. Therefore, the holding member 8 can be moved in two axes directions of tracking T and focusing F using the common supporting members 11 and 12, and when the holding member 8 is moved, the objective lens 8 can be moved.
The optical axis will not tilt.
上記支持部材11,12は、ポリイミド、ポリ
プロピレン等の高弾性を有する合成樹脂で一体成
形し、弾性面13,14,17,18を薄肉面
で、剛体面16,19を厚肉面で構成することが
できる。もちろん、弾性面13,14,17,1
8と剛体面16,19を別々の材料で構成し、こ
れを接着剤で結合したり、あるいは成形金型内部
でインサート、アウトサート等の方法で一体化し
てもよい。 The support members 11 and 12 are integrally molded from a synthetic resin having high elasticity such as polyimide or polypropylene, and the elastic surfaces 13, 14, 17, and 18 are thin walls, and the rigid surfaces 16 and 19 are thick walls. be able to. Of course, the elastic surfaces 13, 14, 17, 1
8 and the rigid surfaces 16 and 19 may be made of different materials, and these may be bonded with an adhesive, or may be integrated by inserting, outsert, etc. inside a molding die.
また、第3図、第4図の実施例では平行四辺形
の枠状体を2個連結したもので構成したが、3個
以上連結したもので構成してもよい。 Furthermore, although the embodiments shown in FIGS. 3 and 4 are constructed by connecting two parallelogram frame bodies, it may be constructed by connecting three or more parallelogram frame bodies.
さらに、第3図、第4図の実施例では装置全体
を小型化するために支持部材11,12を平行に
配置したが、これらの支持部材11,12を第4
図のO−O′軸上に同軸状に配置し、各支持部材
11,12の剛体面16,16で保持部材8を挾
持するようにしてもよい。 Furthermore, in the embodiments shown in FIGS. 3 and 4, the supporting members 11 and 12 are arranged in parallel in order to downsize the entire device, but these supporting members 11 and 12 are arranged in parallel.
The holding member 8 may be arranged coaxially on the O-O' axis in the figure, and the holding member 8 may be held between the rigid surfaces 16, 16 of the respective supporting members 11, 12.
第5図、第6図は上記実施例によるトラツキン
グ方向およびフオーカス方向の伝達特性を示すも
のである。 5 and 6 show the transmission characteristics in the tracking direction and focus direction according to the above embodiment.
以上のように本発明は、保持部材に巻装した2
個のコイルに流れる電流と、上記2個のコイルに
対向して配置されたマグネツト及びヨークの磁力
との電磁作用により、各コイルにそれぞれ駆動力
を発生し、これらの駆動力の合成駆動力により保
持部材を少なくとも2軸方向に駆動するようにし
たものである。このようにすれば保持部材に巻か
れたコイルにより保持部材を直接駆動することが
できるから、保持部材に取付けた対物レンズの位
相特性を著しく優れたものにすることができる。
また2軸に共通の磁気ギヤツプを使用するため、
各軸方向のアンバランスもなく、いずれの周波数
特性も安定で優れたものになる。また磁気ギヤツ
プは直接マグネツトとヨークにより形成している
ので磁気回路の構成が簡単で、しかも、磁気効率
を高めることができる。 As described above, the present invention provides two
The electromagnetic action of the current flowing through each coil and the magnetic force of the magnet and yoke placed opposite the two coils generates a driving force in each coil, and the combined driving force of these driving forces generates a driving force. The holding member is driven in at least two axial directions. In this way, since the holding member can be directly driven by the coil wound around the holding member, the phase characteristics of the objective lens attached to the holding member can be made extremely excellent.
In addition, since a common magnetic gap is used for the two axes,
There is no imbalance in each axis direction, and all frequency characteristics are stable and excellent. Furthermore, since the magnetic gap is directly formed by the magnet and the yoke, the configuration of the magnetic circuit is simple and the magnetic efficiency can be improved.
第1図、第2図は本発明の原理を示す分解斜視
図及び動作説明図、第3図、第4図は本発明の一
実施例の要部破断斜視図および分解斜視図、第5
図、第6図は上記実施例の伝達特性図である。
5,6……コイル、7……対物レンズ、8……
保持部材、9,10……結合用突起部、11,1
2……支持部材、13,14,17,18……弾
性面、16,15,19……剛体面、21……外
ケース、22,23……ヨーク、24,25……
マグネツト。
1 and 2 are an exploded perspective view and an operation explanatory diagram showing the principle of the present invention, FIGS. 3 and 4 are a fragmentary perspective view and an exploded perspective view of essential parts of an embodiment of the present invention, and FIG.
6 are transfer characteristic diagrams of the above embodiment. 5, 6... Coil, 7... Objective lens, 8...
Holding member, 9, 10... Connection protrusion, 11, 1
2... Support member, 13, 14, 17, 18... Elastic surface, 16, 15, 19... Rigid surface, 21... Outer case, 22, 23... Yoke, 24, 25...
Magnet.
Claims (1)
報トラツクに対向して移動自在に配置された保持
部材と、この保持部材に取付けられた対物レンズ
と、上記保持部材に所定の角度をもつてクロスす
るように巻装された2個のコイルと、上記2個の
コイルのクロスする部分と対向する位置に所定の
ギヤツプをあけて配置されたマグネツト及びヨー
クとを備え、上記マグネツト及びヨーク間の磁力
と上記各コイルに流れる電流との電磁作用により
上記各コイルにそれぞれ駆動力を発生し、上記各
コイルに発生する駆動力を合成した合成駆動力に
より上記保持部材を少なくとも2軸方向に駆動す
るようにしたことを特徴とする対物レンズ駆動装
置。1. A holding member movably disposed facing the encoded information track provided on a disc-shaped recording medium, an objective lens attached to this holding member, and a holding member attached at a predetermined angle to the holding member. It is equipped with two coils wound so as to cross each other, and a magnet and a yoke arranged with a predetermined gap at a position facing the crossing portion of the two coils, and between the magnet and the yoke. A driving force is generated in each of the coils through the electromagnetic action of a magnetic force and a current flowing through each of the coils, and the holding member is driven in at least two axial directions by a combined driving force that is a combination of the driving forces generated in each of the coils. An objective lens driving device characterized in that:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6434082A JPS58182139A (en) | 1982-04-16 | 1982-04-16 | Objective lens driving device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6434082A JPS58182139A (en) | 1982-04-16 | 1982-04-16 | Objective lens driving device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58182139A JPS58182139A (en) | 1983-10-25 |
JPH0140407B2 true JPH0140407B2 (en) | 1989-08-29 |
Family
ID=13255410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6434082A Granted JPS58182139A (en) | 1982-04-16 | 1982-04-16 | Objective lens driving device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58182139A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4587466A (en) * | 1982-12-09 | 1986-05-06 | Magnetic Peripherals | Two axis linear motor for optical focusing and tracking system in optical recording |
JPS6069841A (en) * | 1983-09-26 | 1985-04-20 | Toshiba Corp | Optical head device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5819743A (en) * | 1981-07-24 | 1983-02-04 | Pioneer Video Corp | Optical system driver for recorded information reader |
-
1982
- 1982-04-16 JP JP6434082A patent/JPS58182139A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5819743A (en) * | 1981-07-24 | 1983-02-04 | Pioneer Video Corp | Optical system driver for recorded information reader |
Also Published As
Publication number | Publication date |
---|---|
JPS58182139A (en) | 1983-10-25 |
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