JPS583142A - Optical information processor - Google Patents
Optical information processorInfo
- Publication number
- JPS583142A JPS583142A JP10268281A JP10268281A JPS583142A JP S583142 A JPS583142 A JP S583142A JP 10268281 A JP10268281 A JP 10268281A JP 10268281 A JP10268281 A JP 10268281A JP S583142 A JPS583142 A JP S583142A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- magnetic circuit
- magnetic
- optical information
- processing device
- 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
-
- 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
Landscapes
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
- Moving Of Heads (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 本発明は光学式ディスク記録装置に関するものである。[Detailed description of the invention] The present invention relates to an optical disc recording device.
光学式ディスク記録装置は円盤状の記録媒体に回転溝パ
ターンあるいは適当な光の屈折率変化のパターンとして
螺旋状に微小な情報パターンを記録あるいは記録された
情報パターンを再生するために、集光された光ビームを
照射し、パターンの書き込みあるいは検出を行なうもの
である。集光された光ビームを照射し、情報を検出する
ピックアンプ装置は、Ｈｅ −Ｎ ｅ等の気体レーザ又
は半導体レーザを光源とし、集光レンズ、光検出器等の
光学系により構成される。微小な情報パターンの記録再
生を行なうためには集光された光ビームが記録媒体の記
録トラック上を正確番こ追跡するようイこトラック制御
することが必要であると同時に光ビームの焦点位置へ記
録トラックを合致キ仕るフォーカス制御を行なうことが
必要となる。An optical disk recording device records a minute information pattern in a spiral shape as a rotating groove pattern or a pattern of appropriate refractive index changes on a disk-shaped recording medium, or collects light in order to reproduce the recorded information pattern. A light beam is irradiated to write or detect a pattern. A pick amplifier device that irradiates a focused light beam and detects information uses a gas laser such as He-Ne or a semiconductor laser as a light source, and is configured with an optical system such as a condenser lens and a photodetector. In order to record and reproduce microscopic information patterns, it is necessary to control the focused light beam so that it accurately tracks the recording track of the recording medium, and at the same time, it is necessary to control the focused light beam so that it accurately tracks the recording track of the recording medium. It is necessary to perform focus control to align the recording tracks.
従来の光学式ディスク記録装置は、実際の使用に際して
はディスクの高速回転に伴なう面振れあるいは外部から
の振動等の影響を受けて、記録面上の記録トラックが常
に位置変動を起こし易く、従ってこの記録トラックの位
置ずれに追従してピックアップ装置全体あるいは集光系
の一部を移動制ａさせ、上述のトラック制御及びフォー
カス制御を確実に行なうための駆動機構を備えている。When conventional optical disc recording devices are actually used, the recording tracks on the recording surface tend to constantly fluctuate in position due to surface runout caused by high-speed rotation of the disc or external vibrations. Therefore, a drive mechanism is provided to control the movement of the entire pickup device or a part of the light focusing system in accordance with the positional deviation of the recording track, thereby reliably performing the above-mentioned track control and focus control.
この駆動機構を備えたピックアップ装置の一例を第１図
に示す。光源の半導体レーザ／から出力された出力光は
対物レンズ−を介してガルバノミラ−３で光路変換され
る。ガルバノミラ−３は磁気回路の作用によって駆動力
を得て図の紙面（こ垂直な方向の回転軸を中心として回
転し、照射ビーム光を偏向させてトラック制御を行なう
。ガルバノミラ−３で光路変換きれたビーム光は集光レ
ンズグで集束きれ、記録面ｊへ照射される。集光レンズ
グにはフォーカス制御を行なうための駆動部が付設され
ている。この駆動部は永久磁石にと軟鉄製のヨーク７、
♂から成る磁気回路及び集光レンズグに連結された円筒
形導電線コイルタで構成され、円筒形導電線コイル２へ
の通電によ−て発生する磁界と磁気回路との相互作用に
より集光レンズグを記録面ｊと垂直方向へ移動させる駆
動力を形成し、集光レンズグと記録面５間の距離を制御
している。An example of a pickup device equipped with this drive mechanism is shown in FIG. Output light from a semiconductor laser as a light source is optically path-converted by a galvanometer mirror 3 via an objective lens. The galvano mirror 3 obtains a driving force through the action of a magnetic circuit, rotates around a rotation axis perpendicular to the plane of the figure, and deflects the irradiated beam to perform track control.The galvano mirror 3 can change the optical path. The beam light is focused by a condensing lens and is irradiated onto the recording surface j.The condensing lens is equipped with a drive section for focus control.This drive section consists of a permanent magnet and a soft iron yoke. 7,
It consists of a cylindrical conductive wire coil coil connected to a magnetic circuit consisting of a female and a condensing lens, and the condensing lens is formed by the interaction between the magnetic field generated by energizing the cylindrical conductive wire coil 2 and the magnetic circuit. A driving force is generated to move the lens in a direction perpendicular to the recording surface j, and the distance between the condensing lens and the recording surface 5 is controlled.
第１図に示すトラック制御及びフォーカス制御用駆動機
構に於いては、各々の制御用として磁気回路が計−個必
要であ−た。一方、光学式ディスク記録装置に於いては
小型軽量化が非常（こ重要な要素であり、従って磁気回
路の小型化を計るため磁石として小容量で大きなりＨ積
のある希土類マグネットを使用している。しかしながら
希土類マグネットは一般的ζこ広く使用されているフェ
ライトマグネットに比較して非常Ｇこ高価であり、この
ため光学式ディスク記録装置の材料コストが高くなると
いった欠点がある。In the track control and focus control drive mechanism shown in FIG. 1, a total of magnetic circuits are required for each control. On the other hand, miniaturization and weight reduction are very important factors in optical disk recording devices. Therefore, in order to miniaturize the magnetic circuit, rare earth magnets with small capacity and large H product are used as magnets. However, rare earth magnets are extremely expensive compared to the commonly used ferrite magnets, and therefore have the disadvantage of increasing the material cost of optical disc recording devices.
また光学式ディスク記録装置に於いては、記録トラック
に従−て連続的に情報の記録再生又はディスク上の任意
点の情報の記録再生を実行するためピックアップ装置を
ディスク半径方向の任意点に低速あるいは高速移動させ
る必要がある。従ってトラック制御及びフォーカス制御
用駆動機構の他にピックアップ装置を所定速度で移動さ
せるためのピンクアップ送り機構が具備されている。ピ
ックアップ送り機構は直流ヒーター、ステップヒーター
等とラックピニオンとの組み合せにより構成されたもの
や、リニアモーターにより構成されたものがある。In addition, in an optical disc recording device, in order to continuously record/reproduce information according to the recording track or record/reproduce information at an arbitrary point on the disc, the pickup device is moved at a low speed to an arbitrary point in the radial direction of the disc. Or you need to move at high speed. Therefore, in addition to the drive mechanism for track control and focus control, a pink-up feed mechanism for moving the pickup device at a predetermined speed is provided. The pickup feeding mechanism may be constructed by a combination of a DC heater, step heater, etc. and a rack and pinion, or it may be constructed by a linear motor.
以上詳述したように、従来の光学式ディスク記録装置に
は高価な希土類マグネットを使用したトラック制御、フ
ォーカス制御用駆動機構とともにピックアップ送り機構
が必要であり、このため従来の光学式ディスク記録装置
は駆動系が複雑となり製作コストが高くなるとい−た欠
点がある。As detailed above, conventional optical disc recording devices require a pickup feeding mechanism as well as a drive mechanism for track control and focus control using expensive rare earth magnets. The disadvantage is that the drive system becomes complicated and the manufacturing cost increases.
本発明は技術的手段を駆使することにより、従来に於け
る複雑な磁気回路駆動系を簡素化し、安価な光学式ディ
スク記録装置を提供することを目的とするものである。An object of the present invention is to simplify the conventionally complicated magnetic circuit drive system by making full use of technical means, and to provide an inexpensive optical disk recording device.
以下、本発明を実施例に従−て図面を参照しながら詳説
する。Hereinafter, the present invention will be explained in detail according to embodiments with reference to the drawings.
第２図は本発明の一実施例を説明するトラック制御及び
フォーカス制御用駆動機構及びピックアップ送り機構の
要部構成図である。FIG. 2 is a configuration diagram of main parts of a drive mechanism for track control and focus control, and a pickup feeding mechanism, explaining one embodiment of the present invention.
ディスク記録面に垂直方向に移動可能なフォーカス制御
用コイル２′と、フォーカス制御用コイル２′の両側に
配置され、ディスク記録面に平行で記録トラック方向に
直交する方向に移動可能なトラック制御及びピックアッ
プ送り用の直方体コイル／θ、／／を、角柱状番こ成形
され一定間隙を介して３本並設された軟鉄ヨーク／、２
．／、３．／４１の中央の軟鉄ヨーク／３に挿入する。A focus control coil 2' that is movable in a direction perpendicular to the disk recording surface, and a track control coil 2' that is disposed on both sides of the focus control coil 2' and that is movable in a direction parallel to the disk recording surface and orthogonal to the recording track direction. A rectangular parallelepiped coil /θ, // for pickup feeding is formed into a prismatic plate and three soft iron yokes are arranged in parallel with a certain gap between them /, 2
．． /, 3. Insert into the center soft iron yoke /3 of /41.
両端の軟鉄ヨーク／、２ 、 ／４１＋こは同様憂こ角
柱状に成形された永久磁石／ｊ、／にがそれぞれ重ね合
わせて固定孕れており、永久磁石／ｊ、／にはフォーカ
ス制御用コイル２′と直方体コイル／θ、／／ｌこ一定
距離を隔てて対向している。軟鉄ヨーク／２．／３、／
りの軸方向は記録面と平行で記録トラックに直交する方
向に設定されている。軟鉄ヨーク／コ、／３．／４’及
び永久磁石／、５．／ｌで磁気回路が構成され、フォー
カス制御用コイル２′とトラック制御及びピックアップ
送り用の直方体コイル１０、／／は軟鉄ヨーク／３の軸
方向へ通電によりそれぞれ独立して駆動力を受けるよう
に構成されている。一方、フォーカス制御用コイル２は
軟鉄ヨーク／３の軸方向と直角の方向へ駆動力を受ける
ように構成されている。周知の如く磁気回路と導電線コ
イルよりなる駆動機構は、その駆動力の方向がフレシン
グの法則により磁力線及び導電線に垂直な方向となる。Soft iron yokes /, 2, /41+ on both ends have permanent magnets /j, /, which are similarly formed into prismatic shapes, superposed and fixed on top of each other, and the permanent magnets /j, / are used for focus control. The coil 2' and the rectangular parallelepiped coils /θ, //l face each other at a constant distance. Soft iron yoke/2. /3, /
The axial direction of the recording head is parallel to the recording surface and perpendicular to the recording track. Soft iron yoke/ko,/3. /4' and permanent magnet/, 5. /l constitutes a magnetic circuit, and coil 2' for focus control, rectangular parallelepiped coil 10 for track control and pickup feeding, and // receive driving force independently by energization in the axial direction of soft iron yoke /3. It is configured. On the other hand, the focus control coil 2 is configured to receive a driving force in a direction perpendicular to the axial direction of the soft iron yoke/3. As is well known, in a drive mechanism consisting of a magnetic circuit and a conductive wire coil, the direction of its driving force is perpendicular to the magnetic lines of force and the conductive wire, according to Fressing's law.
従って、直方体コイル／θ、／／は軟鉄ヨーク／３を巻
回する方向へ絶縁被覆導線が巻回δれるが、フォーカス
制御に於いては軟鉄ヨーク／３の軸方向と直角方向にピ
ックアップを駆動する必要があるため、本実施例ではフ
ォーカス制御用コイル２′として絶縁被覆導線を平面的
に渦巻き状に巻回し、この平面渦巻き導線を第３図に示
す如く「コ」の字形に折り曲げて軸芯となる軟鉄ヨーク
／３に遊嵌させ、磁気回路空隙内の磁力線の方向と導線
コイルの方向とを駆動力の方向と直交させている。ある
いはフォーカス制御用コイル２′として絶縁被覆導線を
円筒状に巻き、この円筒コイルを平面状に折り曲げたの
ち第り図に示す如く「コ」の字形に折り曲げて軟鉄ヨー
ク７３に遊嵌させ、磁気回路空隙内の磁力線の方向と導
線コイルの方向とを駆動力の方向と直交させるようにし
ても良い。尚、上記実施例φこ於いて、軟鉄ヨーク／２
．／、３．／’Ｉは直線状に成形しているが、これを円
弧状に成形してトラック方向と直交する方向へ円弧状に
ピックアップを走行きせるようにすることもできる。Therefore, in the rectangular parallelepiped coil /θ, //, the insulated conductor is wound δ in the direction of winding the soft iron yoke /3, but in focus control, the pickup is driven in the direction perpendicular to the axial direction of the soft iron yoke /3. Therefore, in this embodiment, as the focus control coil 2', an insulated conductor is spirally wound on a flat surface, and this flat spiral conductor is bent into a "U" shape as shown in FIG. It is loosely fitted into the core soft iron yoke /3, and the direction of the magnetic lines of force in the magnetic circuit gap and the direction of the conductive wire coil are orthogonal to the direction of the driving force. Alternatively, as the focus control coil 2', an insulated conductive wire is wound into a cylindrical shape, this cylindrical coil is bent into a flat shape, and then bent into a "U" shape as shown in the second figure, loosely fitted into the soft iron yoke 73, and the magnetic The direction of the magnetic lines of force within the circuit gap and the direction of the conducting wire coil may be perpendicular to the direction of the driving force. In addition, in the above embodiment φ, soft iron yoke/2
．． /, 3. /'I is formed into a linear shape, but it can also be formed into an arc shape so that the pickup can travel in an arc shape in a direction perpendicular to the track direction.
第５図は第一図に示す駆動機構を備えたピックアップ装
置の構成図である。FIG. 5 is a configuration diagram of a pickup device equipped with the drive mechanism shown in FIG. 1.
トラック制御及びピックアップ送り用の直方体コイル１
０．／／と、フォーカス制御用コイル２′はピックアッ
プ／７１こ直結きれており、駆動力は各コイル２′、／
θ、／／で独立して受けるが動作時にはピックアップ／
７とともに連動される。Rectangular parallelepiped coil 1 for track control and pickup feeding
0. // and the focus control coil 2' are directly connected to the pickup /71, and the driving force is applied to each coil 2', /
It is received independently at θ, //, but during operation it is picked up /
It is linked with 7.
トラック制御及びピックアップ送り用の直方体コイル１
０．／／Ｉこ通電することにより、コイルに発生した磁
界と磁気回路空隙内の磁力線との作用で直方体コイル１
０ 、 ／／が軟鉄ヨーク／３の軸方向即ちディスクの
記録面と平行方向で記録トラック方向に直交する方向（
こ駆動され、これに直結されたピックアツプ７７全体も
記録面と平行方向で記録トラ、夕方向に直交する方向に
駆動される。Rectangular parallelepiped coil 1 for track control and pickup feeding
0. //I By energizing, the rectangular parallelepiped coil 1 is created by the action of the magnetic field generated in the coil and the magnetic lines of force in the magnetic circuit gap.
0, // is the axial direction of the soft iron yoke /3, that is, the direction parallel to the recording surface of the disk and perpendicular to the recording track direction (
This drive causes the entire pickup 77 directly connected to the pickup 77 to also be driven in a direction parallel to the recording surface and perpendicular to the recording track and the evening direction.
ピックアップ／２の移動は、照射光学系全体の移動を意
味するものであり、直方体コイル／θ、／／への通電量
を制御することにより記録面に対して照射ビーム光のト
ラ、り制御及び任意のトラックへの高速移動が実行され
る。尚、この動作に於いてフォーカス制御用コイル２′
もピックアップ／２に直結きれているため、直方体コイ
ル１０．／／に連動される。次にフォーカス制御用コイ
ル２′に通電すると、フォーカス制御用コイル２′はデ
ィスクの記録面と垂直方向に駆動され、これに直結され
たピックアップ／７も記録面と垂直方向に駆動される。The movement of the pickup /2 means the movement of the entire irradiation optical system, and by controlling the amount of current applied to the rectangular parallelepiped coil /θ, //, the irradiation beam light can be controlled and redirected to the recording surface. Fast movement to any track is performed. In addition, in this operation, the focus control coil 2'
Since the coil 10. is also directly connected to the pickup/2, the rectangular parallelepiped coil 10. Linked to //. Next, when the focus control coil 2' is energized, the focus control coil 2' is driven in a direction perpendicular to the recording surface of the disk, and the pickup/7 directly connected thereto is also driven in a direction perpendicular to the recording surface.
尚、このフォーカス制御に於いて、本実施例では、トラ
ック制御及びピックアップ送り用の直方体コイル１０．
／／も連動されるが、直方体コイル／θ、／／は軟鉄ヨ
ーク／３に間隙を有して遊嵌されているため、この挿入
間隙の範囲内で直方体コイル／θ、／／を自在に移動さ
せることができる。In this focus control, in this embodiment, a rectangular parallelepiped coil 10 for track control and pickup feeding is used.
// are also interlocked, but since the rectangular parallelepiped coils /θ, // are loosely fitted into the soft iron yoke /3 with a gap, the rectangular parallelepiped coils /θ, // can be moved freely within this insertion gap. It can be moved.
このように、フォーカス制御とトラック制御及びピック
アップ送り動作を、フォーカス制御用コイルと直方体コ
イルへの通電制御により、同一の磁気回路によって行な
うことができる。In this way, focus control, track control, and pickup feeding operation can be performed by the same magnetic circuit by controlling the current supply to the focus control coil and the rectangular parallelepiped coil.
以上詳説した如く、本発明によれば同一の磁気回路を共
用することによりフォーカス制御とトラック制御及びピ
ックアップ送りを簡単な駆動機構で行なうことができ、
構造が小型でかつ簡単であるため製作コストも安価とな
り、信頼性の高い制御駆動機構が得られる。As explained in detail above, according to the present invention, by sharing the same magnetic circuit, focus control, track control, and pickup feeding can be performed with a simple drive mechanism.
Since the structure is small and simple, manufacturing costs are low, and a highly reliable control drive mechanism can be obtained.
第１図は従来のピックアップ装置の構成図である。
第２図は本発明の一実施例を説明するフォーカス制御と
トラック制御及びピックアップ送りの駆動機構の要部構
成図である。
第３図は第２図に於けるフォーカス制御用コイルの一実
施例を示す斜視図である。
第７図は第一図に於けるフォーカス制御用コイルの他の
実施例を示す斜視図である。
第５図は本発明の一実施例を示す第一図の駆動機構を備
えたピックアップ装置の構成図である。
／・・・半導体レーザー、−・・・対物レンズ、３・・
・ガルバノミラ−１３′・・・固定ミラー、ダ・・・集
光レンズ、ｊ・・・ディスク記録面、２・・・永久磁石
、７、ｌ？・・・ヨーク、ｙ、ｙ’・・・フォーカス制
御用コイル、１０．ｉｉ・・・直方体コイル、／、２．
／、３．／グ・・・軟鉄ヨーク、／６．／ｌ・・・永久
磁石、／Ｚ・・・ピックアップ。
代理人 弁理士 福 士 愛 彦FIG. 1 is a block diagram of a conventional pickup device. FIG. 2 is a diagram illustrating a main part of a drive mechanism for focus control, track control, and pickup feeding, explaining an embodiment of the present invention. FIG. 3 is a perspective view showing an embodiment of the focus control coil in FIG. 2. FIG. 7 is a perspective view showing another embodiment of the focus control coil in FIG. 1. FIG. 5 is a configuration diagram of a pickup device equipped with the drive mechanism shown in FIG. 1, showing one embodiment of the present invention. /... semiconductor laser, -... objective lens, 3...
- Galvano mirror 13'... fixed mirror, da... condensing lens, j... disk recording surface, 2... permanent magnet, 7, l? ... Yoke, y, y' ... Focus control coil, 10. ii...cuboid coil, /, 2.
/, 3. /G... Soft iron yoke, /6. /l...Permanent magnet, /Z...Pickup. Agent Patent Attorney Aihiko Fukushi
Claims (1)
トラック上に照射して情報を光学的に記録再生する光学
式情報処理装置に於いて、前記光ビーム照射系に対する
駆動力を形成する磁気回路と、該磁気回路（こ配置され
、前記情報記録面と略々垂直方向に前記光ビーム照射系
を前記駆動力で磁気駆動してフォーカス制御を行なう第
１のコイルと、前記磁気回路に配置され、前記情報記録
面と略々平行方向で前記記録トラック方向に略々直交す
る方向（こ前記光ビーム照射系を前記駆動力で磁気駆動
してトラック制御及びラジアル送りを行なう第一のコイ
ルとを具備して成り、前記磁気回路により得られる駆動
力を共用して前記第１のコイルと前記第一のコイルを個
別駆動するようにしたことを特徴とする光学式情報処理
装置。 ２ 前記第１のコイルは、平面的に渦巻き状に絶縁被覆
導線を巻回し、磁芯体外周に沿って折曲されかつコイル
と前記磁気回路の磁力線とが直交するように成形されて
いる特許請求の範囲第１項記載の光学式情報処理装置。 ３、前記第１のコイルは絶縁被覆導線を円筒状に巻回し
、磁芯体外周Ｇこ沿−て折曲され、かつコイルと前記磁
気回路の磁力線とが直交するように成形されている特許
請求の範囲第１項記載の光学式情報処理装置。[Scope of Claims] l In an optical information processing device that optically records and reproduces information by irradiating a beam light from a light beam irradiation system onto a recording track of an information recording surface, a magnetic circuit that forms a driving force, and a first coil arranged in the magnetic circuit that magnetically drives the light beam irradiation system with the driving force in a direction substantially perpendicular to the information recording surface to perform focus control. , disposed in the magnetic circuit in a direction substantially parallel to the information recording surface and substantially orthogonal to the recording track direction (the light beam irradiation system is magnetically driven by the driving force to perform track control and radial feeding); optical information, characterized in that the first coil and the first coil are individually driven by sharing the driving force obtained by the magnetic circuit. Processing device. 2 The first coil is formed by winding an insulated conductive wire in a spiral shape in a plane, bending it along the outer periphery of the magnetic core, and so that the coil and the lines of magnetic force of the magnetic circuit are perpendicular to each other. The optical information processing device according to claim 1. 3. The first coil is formed by winding an insulated conductive wire in a cylindrical shape, and bending the coil along the outer periphery G of the magnetic core. 2. The optical information processing device according to claim 1, wherein the optical information processing device is shaped so that the magnetic field lines of the magnetic circuit and the magnetic field lines of the magnetic circuit are orthogonal to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10268281A JPS583142A (en) | 1981-06-30 | 1981-06-30 | Optical information processor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10268281A JPS583142A (en) | 1981-06-30 | 1981-06-30 | Optical information processor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS583142A true JPS583142A (en) | 1983-01-08 |
| JPS6223377B2 JPS6223377B2 (en) | 1987-05-22 |
Family
ID=14333999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10268281A Granted JPS583142A (en) | 1981-06-30 | 1981-06-30 | Optical information processor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS583142A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS616057U (en) * | 1984-06-19 | 1986-01-14 | エヌオーケー株式会社 | chain tensioner |
| JPS6220325U (en) * | 1985-07-19 | 1987-02-06 | ||
| JPS62101122U (en) * | 1985-12-14 | 1987-06-27 | ||
| JPS6350924A (en) * | 1986-08-20 | 1988-03-03 | Oki Electric Ind Co Ltd | Objective lens driving device |
| JPH01282738A (en) * | 1989-03-15 | 1989-11-14 | Sanyo Electric Co Ltd | Pickup transfer device |
| EP0595785A1 (en) * | 1989-06-13 | 1994-05-04 | Kabushiki Kaisha Toshiba | Electro-magnetic actuator and optical disk |
| US5491684A (en) * | 1993-04-02 | 1996-02-13 | Matsushita Electric Industrial Co., Ltd. | Optical disk unit |
| US5690569A (en) * | 1996-03-13 | 1997-11-25 | Borg-Warner Automotive, Inc. | Single piece reinforced chain guide |
| US5813935A (en) * | 1996-07-23 | 1998-09-29 | Borg-Warner Automotive, Inc. | Chain guide with extruded wear face |
| EP0516813B1 (en) * | 1990-12-21 | 1998-10-14 | Art Tech Gigadisc Atg | Control device for optical disks |
| US5846150A (en) * | 1997-03-21 | 1998-12-08 | Borg-Warner Automotive, Inc. | Guide posts for guiding and damping chain movement |
| JP2008131988A (en) * | 2006-11-27 | 2008-06-12 | Kawashima Kogyo Kk | Presser for manual slicer |
| JP4843666B2 (en) * | 2005-03-08 | 2011-12-21 | ベルナー クンストシュトフ− ウント メタルヴァーレンファブリーク ゲーエムベーハー | General purpose grater |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0295482U (en) * | 1989-01-12 | 1990-07-30 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5494007A (en) * | 1978-01-05 | 1979-07-25 | Olympus Optical Co Ltd | Pickup for disc recorder recorded optically with information |
| JPS5580834A (en) * | 1978-12-08 | 1980-06-18 | Thomson Csf | Accessing device for track provided in optical recordable and readable medium * and optical system including said device |
-
1981
- 1981-06-30 JP JP10268281A patent/JPS583142A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5494007A (en) * | 1978-01-05 | 1979-07-25 | Olympus Optical Co Ltd | Pickup for disc recorder recorded optically with information |
| JPS5580834A (en) * | 1978-12-08 | 1980-06-18 | Thomson Csf | Accessing device for track provided in optical recordable and readable medium * and optical system including said device |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS616057U (en) * | 1984-06-19 | 1986-01-14 | エヌオーケー株式会社 | chain tensioner |
| JPS6220325U (en) * | 1985-07-19 | 1987-02-06 | ||
| JPS62101122U (en) * | 1985-12-14 | 1987-06-27 | ||
| JPS6350924A (en) * | 1986-08-20 | 1988-03-03 | Oki Electric Ind Co Ltd | Objective lens driving device |
| JPH01282738A (en) * | 1989-03-15 | 1989-11-14 | Sanyo Electric Co Ltd | Pickup transfer device |
| EP0595785A1 (en) * | 1989-06-13 | 1994-05-04 | Kabushiki Kaisha Toshiba | Electro-magnetic actuator and optical disk |
| EP0516813B1 (en) * | 1990-12-21 | 1998-10-14 | Art Tech Gigadisc Atg | Control device for optical disks |
| US5491684A (en) * | 1993-04-02 | 1996-02-13 | Matsushita Electric Industrial Co., Ltd. | Optical disk unit |
| US5690569A (en) * | 1996-03-13 | 1997-11-25 | Borg-Warner Automotive, Inc. | Single piece reinforced chain guide |
| US5813935A (en) * | 1996-07-23 | 1998-09-29 | Borg-Warner Automotive, Inc. | Chain guide with extruded wear face |
| US5846150A (en) * | 1997-03-21 | 1998-12-08 | Borg-Warner Automotive, Inc. | Guide posts for guiding and damping chain movement |
| JP4843666B2 (en) * | 2005-03-08 | 2011-12-21 | ベルナー クンストシュトフ− ウント メタルヴァーレンファブリーク ゲーエムベーハー | General purpose grater |
| JP2008131988A (en) * | 2006-11-27 | 2008-06-12 | Kawashima Kogyo Kk | Presser for manual slicer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6223377B2 (en) | 1987-05-22 |
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