JPS5914142A - Biaxial actuator of optical information recording and reproducing device - Google Patents

Biaxial actuator of optical information recording and reproducing device

Info

Publication number
JPS5914142A
JPS5914142A JP12423282A JP12423282A JPS5914142A JP S5914142 A JPS5914142 A JP S5914142A JP 12423282 A JP12423282 A JP 12423282A JP 12423282 A JP12423282 A JP 12423282A JP S5914142 A JPS5914142 A JP S5914142A
Authority
JP
Japan
Prior art keywords
elastic body
recording medium
optical information
light
information recording
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
Application number
JP12423282A
Other languages
Japanese (ja)
Inventor
Kenjiro Kime
健治朗 木目
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP12423282A priority Critical patent/JPS5914142A/en
Publication of JPS5914142A publication Critical patent/JPS5914142A/en
Pending legal-status Critical Current

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
    • G11B7/0932—Details of sprung supports

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To obtain a miniature and inexpensive biaxial actuator with a simple constitution, by supporting movably the whole part of an optical pickup or an objective lens with an elastic matter in both an axial direction and in a direction orthogonal to a track. CONSTITUTION:An optical pickup 3 consisting of a light source, a photodetecting element and an objective lens 2 is supported by a tracking elastic matter 4b and movably toward an arrow A which is orthogonal to a disk 5. At the same time, the elastic matter 4b is unified with a focusing elastic matter 4a and can move in an optical axis direction shown by an arrow B. An elastic matter 4 is simply produced by giving an etching process to a sheet of plate spring. This matter 4 is connected to the pickup 3 with an adhesive. Thus it is possible to obtain a miniature and inexpensive biaxial actuator with a simple constitution.

Description

【発明の詳細な説明】 本発明は光学式情報記録再生装置のフォーカス制御、ド
ラッギング制御を行なうための２軸アクチユエータの光
ピツクアップ支持機構に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical pickup support mechanism for a two-axis actuator for performing focus control and dragging control in an optical information recording/reproducing apparatus.

従来この種の装置としては例えばビデオディスクプレー
ヤ、ディジタルオーディオプレーヤ等か知られている。Conventionally, devices of this type include, for example, video disc players and digital audio players.

この光学式情報記録再生装置に使用されるディスクは、
一般にそのトラックピンチか１〜２睡程度であり、かつ
そのトラック幅が約Ｑ、５ｎｍ程度である、このように
高密度に形成されたディスクに光学的に記録したり再生
するためには、光源からの光スポットを直径１〜２μｍ
程度に集光する必要かある。このためトラックと光スポ
ットとの相対的な位置すれによるトラッキング誤差はサ
ブミクロンのオーダで維持されなければなこれらのトラ
ッキング誤差および焦点誤差を制御するため従来の光学
式情報記録再生装置には可動ミラーおよびボイスコイル
アクチュエータか設けられている。すなわち、可動ミラ
ーは光源からの光をディスク上の半径方向に偏向するこ
とによってトラッキング誤差を補正する。また、ボイス
コイルアクチュエータは光源からの光をトラック上に集
光する対物レンズを駆動するものであって、この対物レ
ンズを光軸方向に駆動することによって焦点誤差を補正
する。The discs used in this optical information recording and reproducing device are
In general, the track pinch is about 1 to 2 times, and the track width is about Q, 5 nm. In order to optically record and play back on such a densely formed disk, a light source is required. The light spot from 1 to 2 μm in diameter
It is necessary to focus the light to a certain extent. For this reason, tracking errors due to relative positional misalignment between the track and the light spot must be maintained on the order of submicrons.In order to control these tracking errors and focus errors, conventional optical information recording and reproducing devices use movable mirrors. and a voice coil actuator. That is, the movable mirror corrects the tracking error by deflecting the light from the light source in the radial direction on the disk. Further, the voice coil actuator drives an objective lens that focuses light from a light source onto a track, and corrects focus errors by driving this objective lens in the optical axis direction.

しかし、従来の光学式情報記録再生装置では、光源から
の光路中に可動ミラーとボイスコイルアクチュエータと
を分離して設けているため、装置を小型化できないとい
う問題点かあった。また、従来の装置は光を偏光してト
ラッキング制御しているため、対物レンズの光軸傾きに
よる収差、光のケラレについて十分に考慮する必要があ
り高価なものになること、性能に限界かあるといった欠
点かあった。However, in conventional optical information recording and reproducing devices, the movable mirror and the voice coil actuator are separately provided in the optical path from the light source, so there is a problem that the device cannot be miniaturized. In addition, since conventional devices perform tracking control by polarizing the light, it is necessary to take into account aberrations due to the optical axis tilt of the objective lens and vignetting of the light, making them expensive and having limited performance. There were some drawbacks.

そこで、本発明の目的は安価でかつ簡単な構成で小型化
でき、光を偏向することなく光ピツクアップ全体もしく
は対物レンズをトラックと直交する方向に移動ｉＴ能に
支持し、かつ光軸方向にも移動可能に支持する２軸アク
チユエータの支持機構を提供することである。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to enable miniaturization with an inexpensive and simple configuration, support the entire optical pickup or objective lens in a direction perpendicular to the track without deflecting the light, and support the optical pickup in the optical axis direction as well. An object of the present invention is to provide a support mechanism for a two-axis actuator that is movably supported.

以下、図を用いて本発明の一実施例について説明する。An embodiment of the present invention will be described below with reference to the drawings.

第１図は発明の一実施例の２軸アクチユエータの構成を
示す図であり、（１）は光束、（２）は対物レンズ、（
３）は光源、受光素子、フォーカスサーボセンサー・ｌ
・ラックサーボセンサーを構成する光ピツクアップ（３
）を矢印へのトラッキング制候方向に可動に又、矢印Ｂ
のフォーカス制御方向にも可動に支持する弾性体である
。FIG. 1 is a diagram showing the configuration of a two-axis actuator according to an embodiment of the invention, in which (1) is a light beam, (2) is an objective lens, (
3) Light source, light receiving element, focus servo sensor
・Optical pickup (3) that constitutes the rack servo sensor
) can be moved in the tracking control direction to arrow B.
It is an elastic body that supports movably also in the focus control direction.

第２図から第５ヌ１１こけ弾性体（４）の動作を示す。FIG. 2 shows the operation of the fifth element 11 moss elastic body (4).

なお、（５）は記録媒体であるところのディスクである
。Note that (5) is a disk which is a recording medium.

第６図には本実施例の弾性体（４）の展開図を示す。FIG. 6 shows a developed view of the elastic body (4) of this embodiment.

次に第１図ないし第６図を参照して構成を述べる。光学
式情報再生装置のフォーカス・トラッキング制御装置は
少なくとも光源（図示せず）、集光手段の一例の対物レ
ンズ（２）、制御回路（図示せず）、上記光源・集光手
段を含む光ピツクアップ全体もしくはその一部をフォー
カス方向と、トラッキング方向に光スポットか移動する
ように支持する機構、さらにその駆動装置（図示せず）
から構成される。Next, the configuration will be described with reference to FIGS. 1 to 6. The focus/tracking control device of the optical information reproducing device includes at least a light source (not shown), an objective lens (2) which is an example of a focusing means, a control circuit (not shown), and an optical pickup including the light source and focusing means. A mechanism that supports the whole or part of the light spot so that it moves in the focusing direction and the tracking direction, and its driving device (not shown)
It consists of

本実施例においては第１図に示すよう１こ光源。In this embodiment, one light source is used as shown in FIG.

受光素子、センサー（いずれも図示せず）と対物レンズ
から成る光ピツクアップ（３）をトラッキング用弾性体
（４ｂ）で支持し、矢印＋Ａ＋方向に可動に支持されて
いる。第３図、第５図に示すように弾性体（４ｂ）は平
行バネを形成しており矢印（Ａ＋方向すなわちディスク
（５）上のトラックとほぼ直交する方向に動作する。又
、トラッキング用弾性体は、オーカス用弾性体（４ａ）
と１体に結合しており、第２図。An optical pickup (3) consisting of a light receiving element, a sensor (none of which are shown) and an objective lens is supported by a tracking elastic body (4b) and is movably supported in the +A+ direction. As shown in FIGS. 3 and 5, the elastic body (4b) forms a parallel spring and moves in the direction of the arrow A+, that is, in a direction substantially perpendicular to the track on the disk (5). The body is an elastic body for orcus (4a)
and are combined into one body, as shown in Figure 2.

第４図に示すように矢印（Ｂ）方向すなわち光軸方向に
平行バネを形成して動作する。弾性体（４）は第６図に
示すように１枚の板バネから構成することが可能で、材
料は例えばバネ川べり＋７ウム銅をエツチング加工する
ことにより簡単に製作できる。又、いくつかのバネを組
合せて組立てるのに比べて簡単に組立てられる。本例で
は光ピツクアップ（３）と弾性体（４）は接着により結
合した。As shown in FIG. 4, it operates by forming parallel springs in the direction of arrow (B), that is, in the direction of the optical axis. The elastic body (4) can be constructed from a single leaf spring as shown in FIG. 6, and can be easily manufactured by etching spring material + 7 um copper, for example. Also, it is easier to assemble than combining several springs. In this example, the optical pickup (3) and the elastic body (4) are bonded together by adhesive.

本実施例は以上のように構成したが、第７図に示すよう
に弾性体（４］にスリットを設けてバネ定数と板厚を適
正に選定することも簡単にできる。Although the present embodiment is constructed as described above, it is also possible to easily select the spring constant and plate thickness appropriately by providing a slit in the elastic body (4) as shown in FIG.

又、弾性体（４）として上記スリット部にゴム材＋６１
（例エバシリコンゴム等）をうめ込み金属部（例えばべ
ＩＪ　ＩＪウム銅）（７）と交互に構成すれば共振点に
おける振動レベルをおさえる効果があり、制御特性の向
上につなかる。In addition, a rubber material +61 is attached to the slit portion as an elastic body (4).
By embedding metal parts (e.g., evaporated silicon rubber, etc.) and alternating with metal parts (e.g., aluminum, copper, etc.) (7), it is effective to suppress the vibration level at the resonance point, leading to improvement in control characteristics.

又、本実施例では光ピツクアップ（３）全体を弾性体（
４）で支持する例について述べたが、対物レンズ（２）
だけを本構成の弾性体（４）で支持してもよく、この場
合駆動部のパワー低減、小型化が可能となる。In addition, in this embodiment, the entire optical pickup (3) is made of an elastic body (
As mentioned in 4), the objective lens (2)
Only that part may be supported by the elastic body (4) of this configuration, and in this case, it is possible to reduce the power and downsize of the drive unit.

以上述へてきたように本考案の弾性体支持によれば、従
来の光軸を傾けて制御する方法に比べて発生する収差が
小さく、対物レンズのコストダウンか可能となるととも
に制御動作による光のケラレがほとんどなく制御範囲の
拡大につながる。又、本考案の弾性体は１枚で構成され
ており、加工性１組立性が非常に簡単となるという効果
がある。As mentioned above, according to the elastic body support of the present invention, the aberrations generated are smaller compared to the conventional method of controlling the optical axis by tilting it, making it possible to reduce the cost of the objective lens, and making it possible to reduce the amount of light generated by the control operation. There is almost no vignetting, leading to an expanded control range. In addition, the elastic body of the present invention is composed of one sheet, which has the effect of greatly simplifying workability and assembly.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の一実施例の２軸アクチユエータの構成
を示す写視図である。第２図は２軸アクチユエータの側
面図、第３図は正面図である。第４図は弾性体（４）の
変形状態を示す側面図、第５図は正面図である。第６図
は弾性体（４）の展開図である。第７図は他の実施例の
弾性諮堆展開図である。第８図は他の実施例の弾性体の
構成を示す部分断面図である。 図において、（１１は光束、（２）は対物レンズ、（３
）は光ピツクアップ、（４）は弾性体、（４ａ）はフォ
ーカス用弾性体、（４ｂ）はトラッキング用弾性体、（
５）はディスク、＋６１はゴム材、（７）は金属部であ
る。 図中、同一符号は同一または相当部分を示す。 代理人　葛野信− 第１図 第２図　　　　　　第３図 第４図　　　　　　第５図 第６１１ 手続補正書（自発） 持許庁長肖゛殿 １、　１１ｆｒ！＋−の表、Ｊぐ　　　　特願昭５７−
１２４２８２号東ｆｌとの関係　　　持許出１９Ｃ１人
１１：、所　　　　　東東部千代１（］区丸の内皿口」
２番３号名　ｆ４、（６０１）　　　三菱電機株式会社
代表者　片　１１１に　八　部 ４代理人 住　所　　　　　東京都千代１月区丸の白玉丁目２番３
罵５、補正の対象 （１）　　明細書の発明の詳細な説明の欄６、　補正の
内容 （１）明細書をつぎのとおり訂正する。FIG. 1 is a photographic view showing the configuration of a two-axis actuator according to an embodiment of the present invention. FIG. 2 is a side view of the two-axis actuator, and FIG. 3 is a front view. FIG. 4 is a side view showing the deformed state of the elastic body (4), and FIG. 5 is a front view. FIG. 6 is a developed view of the elastic body (4). FIG. 7 is a developed view of the elastic structure of another embodiment. FIG. 8 is a partial sectional view showing the structure of an elastic body of another embodiment. In the figure, (11 is the luminous flux, (2) is the objective lens, (3
) is an optical pickup, (4) is an elastic body, (4a) is an elastic body for focusing, (4b) is an elastic body for tracking, (
5) is a disk, +61 is a rubber material, and (7) is a metal part. In the drawings, the same reference numerals indicate the same or corresponding parts. Agent Makoto Kuzuno - Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 611 Procedural amendment (voluntary) Portrait of the Director of the Licensing Agency 1, 11fr! +- table, Jgu patent application 1987-
Relationship with No. 124282 Higashi fl Permit 19C 1 person 11:, Location Tobu Chiyo 1 (] Marunouchi Saraguchi, Ward)
Number 2 and 3 Name f4, (601) Mitsubishi Electric Corporation Representative Part 111 Part 8 Part 4 Agent Address 2-3 Shiratama-chome, Maruno, Chiyo January-ku, Tokyo
5. Subject of amendment (1) Column 6 of detailed explanation of the invention in the specification, Contents of amendment (1) The specification is corrected as follows.

Claims (5)

【特許請求の範囲】[Claims] （１）記録媒体の情報トラックと記録された情報を光学
的に再生、もしくは記録媒体上に光学的に記録する光学
式情報記録再生装置において、光源と、光源からの光を
集光して前記媒体上に光スポットとして与える集光手段
と、前記光スポットと前記情報トラックの相対位置ずれ
に相関するトラッキング誤差を検出するトラッキングセ
ンサーと、前記記録媒体と光スポットの光軸方向の位置
ずれに相関する焦点誤差を検出するフォーカスセンサー
と、前記記録媒体からの情報を光学的に受光する受光素
子と、上記光源、集光手段、センサー。 受光素子の全体もしくはその１部を前記記録媒体上の光
スポットが光軸方向と、トラッキング方向（情報トラッ
クと直交する方向）に移動するように可動に支持する支
持弾性体と、前記光軸方向とトラッキング方向に前記セ
ンサ〜にょる誤差Ｉこ応じて、駆動させる駆動手段とを
備えたことを特徴とする光学式情報記録再生装置の２軸
アクチユエーター(1) In an optical information recording and reproducing device that optically reproduces information recorded on an information track of a recording medium or optically records information on a recording medium, it includes a light source and a light source that focuses the light from the light source. a focusing means for providing a light spot on a medium; a tracking sensor that detects a tracking error correlated to a relative positional deviation between the light spot and the information track; a focus sensor that detects a focus error, a light receiving element that optically receives information from the recording medium, the light source, the light focusing means, and the sensor. a supporting elastic body movably supporting the entire light receiving element or a part thereof so that a light spot on the recording medium moves in the optical axis direction and in the tracking direction (direction perpendicular to the information track); and A two-axis actuator for an optical information recording/reproducing device, comprising: and a driving means for driving the sensor in the tracking direction according to the error I. （２）前記支持弾性体は、前記記録媒体の半径方向と記
録媒体面に平行に移動可能に支持する第１の弾性体と、
光軸方向に記録媒体面と直交する方向に移動可能に支持
する第２の弾性体とから成ることを特徴とする特許請求
の範囲第１項記載の光学式情報記録再生装置の２軸アク
チユエータ。(2) the support elastic body is a first elastic body that supports the recording medium so as to be movable in the radial direction and parallel to the recording medium surface;
2. A two-axis actuator for an optical information recording/reproducing apparatus according to claim 1, further comprising a second elastic body movably supported in the direction of the optical axis and perpendicular to the surface of the recording medium. （３）前記支持弾性体は、第１の弾性体と第２の弾性体
が１体で構成されていることを特徴とする特許請求の範
囲第２項記載の光学式情報記録再生装置の２軸アクチユ
エータ。(3) The optical information recording and reproducing apparatus according to claim 2, wherein the supporting elastic body is composed of a first elastic body and a second elastic body. Axis actuator. （４）前記支持弾性体は、１部スリットが設けられてい
ることを特徴とする特許請求の範囲第１項ないし第３項
のいずれかに記載の光学式情報記録再生装置の２軸アク
チユエータ。(4) A two-axis actuator for an optical information recording/reproducing device according to any one of claims 1 to 3, wherein the supporting elastic body is partially provided with a slit. （５）前記支持弾性体は、１部に設けたスリットにゴム
弾性体じゆてんしたことを特徴とする特許請求の範囲第
１項ないし４部３項のいずれかに記載の光学式情報記録
再生装置の２軸アクチユエータ。(5) The optical information recording system according to any one of claims 1 to 4-3, wherein the support elastic body is a rubber elastic body inserted into a slit provided in one part. 2-axis actuator for playback equipment.
JP12423282A 1982-07-14 1982-07-14 Biaxial actuator of optical information recording and reproducing device Pending JPS5914142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12423282A JPS5914142A (en) 1982-07-14 1982-07-14 Biaxial actuator of optical information recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12423282A JPS5914142A (en) 1982-07-14 1982-07-14 Biaxial actuator of optical information recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS5914142A true JPS5914142A (en) 1984-01-25

Family

ID=14880241

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12423282A Pending JPS5914142A (en) 1982-07-14 1982-07-14 Biaxial actuator of optical information recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5914142A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6236740A (en) * 1985-08-09 1987-02-17 Pioneer Electronic Corp Optical pickup device
US7478411B2 (en) 2004-09-17 2009-01-13 Toshiba Samsung Storage Technology Korea Corporation Optical pickup actuator and method with multi-conductive suspension

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6236740A (en) * 1985-08-09 1987-02-17 Pioneer Electronic Corp Optical pickup device
US7478411B2 (en) 2004-09-17 2009-01-13 Toshiba Samsung Storage Technology Korea Corporation Optical pickup actuator and method with multi-conductive suspension

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