JPS61104339A - Optical means driving device - Google Patents

Optical means driving device

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Publication number
JPS61104339A
JPS61104339A JP22250784A JP22250784A JPS61104339A JP S61104339 A JPS61104339 A JP S61104339A JP 22250784 A JP22250784 A JP 22250784A JP 22250784 A JP22250784 A JP 22250784A JP S61104339 A JPS61104339 A JP S61104339A
Authority
JP
Japan
Prior art keywords
optical means
focus
track
movable holder
disc
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
Application number
JP22250784A
Other languages
Japanese (ja)
Other versions
JP2516738B2 (en
Inventor
Nobuo Takeshita
伸夫 竹下
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 JP59222507A priority Critical patent/JP2516738B2/en
Publication of JPS61104339A publication Critical patent/JPS61104339A/en
Application granted granted Critical
Publication of JP2516738B2 publication Critical patent/JP2516738B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To improve the transmission characteristic by controlling an optical means in the focus control direction as well as the tracking control direction by the linear system. CONSTITUTION:An optical beam 13 from a light source (omitted in the figure) is condensed by an object lens 1 to form a light spot 14 on an information recording face (omitted in the figure) of a disc. If the off focus of the light spot 14 to the recording face of the disc or the off track of the light spot 14 to a track of the disc is detected, a proper current is given to a focus controlling coil 3 or tracking controlling coils 5a-5d in accordance with the detected quantity. Thus, the second moving holder 2 and the first moving holder 4 are operated in the focus control direction of an arrow Q and the tracking direction of an arrow P respectively to adjust the off focus and the off track of the object lens 1 to the disc.

Description

【発明の詳細な説明】 〔発明の技術分野〕 この発明は1光学式ディスクプレーヤ等において採用さ
れる光学手段駆動装置に関するもので。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an optical means driving device employed in an optical disc player or the like.

特に情報が記録されたディスクの情報記録面に対する元
スポットの焦点すれと、ディスクのトラックに対する元
スポットのトラックずれとを検知し。
In particular, it detects the out-of-focus of the original spot with respect to the information recording surface of the disc on which information is recorded, and the track deviation of the original spot with respect to the tracks of the disc.

これらの検知量に応じて光学手段の位置を適正に制御す
るように駆動する光学手段駆動装置に関するものである
The present invention relates to an optical means driving device that drives the optical means to appropriately control the position of the optical means in accordance with these detected amounts.

〔従来の技術〕[Conventional technology]

従来のこの種の装置として2光学式ディスクプレーヤに
おいて使用される対物レンズ装置がある。
A conventional device of this type is an objective lens device used in a two-optical disc player.

第1図がその1例で1図においてalはディスク。Figure 1 is an example of this; in Figure 1, al is a disk.

(至)は対物レンズ、(至)は偏向ミラー、顛は元ビー
ムである。
(to) is the objective lens, (to) is the deflection mirror, and (to) is the original beam.

次に動作について説明する。Next, the operation will be explained.

元ビーム顛は、偏光ミラーC3Gにより方向を変えられ
、対物レンズ(至)Kより集光されて、ディスクIII
上に焦点を結ぶ。ディスク(1)の記録面の元軸方′向
のずれ及びトラック方向のずれに応じて、それぞれ対物
レンズ(至)を入方向の様に上下方向に、偏向ミラー全
B方同の様に回転させて、正確に記録面のトラック上に
焦点を結ぶ機制御する。
The direction of the original beam is changed by a polarizing mirror C3G, focused by an objective lens (toward) K, and then transferred to a disk III.
Focus on the top. According to the deviation of the recording surface of the disk (1) in the direction of the original axis and in the track direction, the objective lens (to) is rotated up and down in the direction of entry, and all deflection mirrors B are rotated in the same way. and control the machine to accurately focus on the track on the recording surface.

従来の光学手段、1駆動装置は1以上の様に構成されて
いるので、トラック方向の制御を行なうためには、偏向
ミラーを傾けなければならないため。
Since the conventional optical means and one driving device are configured in one or more ways, the deflection mirror must be tilted in order to control the track direction.

元ビームの元軸が、対物レンズの元軸に対して傾むくな
どの欠点があった。
There were drawbacks such as the original axis of the original beam being tilted with respect to the original axis of the objective lens.

〔発明の概要〕[Summary of the invention]

この発明は上記のような従来のものの欠点を除去するた
めになされたもので2元軸を傾けることなく、焦点方向
制御、トラッキング方向制御が行なえるため、対物レン
ズの構造全簡易にすることができ、また、可動部の支持
材が不要である様な光学手段駆動装置を提供するもので
ある。
This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and since the focal direction and tracking direction can be controlled without tilting the binary axes, the entire structure of the objective lens can be simplified. It is an object of the present invention to provide an optical means driving device which is capable of driving a movable part and does not require a support member for a movable part.

〔発明の実施例〕[Embodiments of the invention]

以下、この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.

第2図ないし第5図は、この発明の一実施例を示すもの
で、第2図は平面図であり、第3図は第2図の1−[線
における断面図であり、第4図は。
2 to 5 show an embodiment of the present invention, in which FIG. 2 is a plan view, FIG. 3 is a cross-sectional view taken along the line 1-[ of FIG. 2, and FIG. teeth.

第1図の光学手段駆動装置の永久磁石を除いて示す斜視
図であり、第5図は、第4図に示されたものの組豆て状
態を示す分解斜視図である。
FIG. 5 is a perspective view of the optical means driving device of FIG. 1 with the permanent magnet removed, and FIG. 5 is an exploded perspective view of the device shown in FIG. 4 in an assembled state.

これらの図面に示される光学手段駆動装置は。The optical means driving device shown in these drawings is:

大きく分けて固定部と、トラッキング制御用可動部と焦
点溜購用可動部によって構成される。固定ホルダα2は
、固定部分の一部を成すもので、そこには軸受部(11
a)、 (11b)が設けられており、さらに両側に永
久磁石(9a)、 (9b)が配置され固定されている
。またその永久磁石(9a)、 (9b)のそれぞれの
外側に鉄板等からなる磁性体板(10a)。
It is broadly divided into a fixed part, a tracking control movable part, and a focusing movable part. The fixed holder α2 forms part of the fixed part, and there is a bearing part (11
a) and (11b) are provided, and permanent magnets (9a) and (9b) are further arranged and fixed on both sides. Further, a magnetic plate (10a) made of an iron plate or the like is provided on the outside of each of the permanent magnets (9a) and (9b).

(10b)か取り付けられている。(10b) is attached.

トラッキング制御用可動部は、第1の可動ホルダ(4)
及び永久磁石(9a)、 (9b)が通る様に第1の可
動ホルダ(4)に設けられた窓部(6a)、 (6b)
及びトラッキング方向制御用コイル(5aL(5b)l
(5C)。
The tracking control movable part is the first movable holder (4)
and windows (6a) and (6b) provided in the first movable holder (4) so that the permanent magnets (9a) and (9b) pass through.
and tracking direction control coil (5aL(5b)l
(5C).

(5d)及びスライド軸受部(8)、及び軸受部(11
a)。
(5d), slide bearing part (8), and bearing part (11
a).

(11b)部を通る軸(7a)、 (7b)より構成さ
れる。
It is composed of axes (7a) and (7b) passing through part (11b).

この可動部は、 [l!111 (7a)、 (7b)
によりトラッキング方向に摺動自在とされる。
This moving part is [l! 111 (7a), (7b)
This makes it possible to freely slide in the tracking direction.

吊2のol’ g5Bホルダ(2)には、対物レンズ(
1膜5取付けられ、第2の可動ホルダ(2)には、焦点
方向制御用コイル(3)が巻き付けられている。なお、
第3図において、t13は光ビームを、(14は対物レ
ンズ(1)によって集光される元スポットを示している
The objective lens (
A focal direction control coil (3) is wound around the second movable holder (2). In addition,
In FIG. 3, t13 indicates the light beam, and 14 indicates the original spot focused by the objective lens (1).

次に動作について説明する。Next, the operation will be explained.

この様に構成された光学手段耶勤装置において。In the optical means operating device configured in this manner.

光源(図示せず)から出射された元ビーム0は。The original beam 0 is emitted from a light source (not shown).

第3図に示す様に、対物レンズ111によって集光され
、ディスクの情報記録面(図示せず)に元スポットα4
を形成する。この時、ディスクの情報記録面に対する元
スホツ)04)の焦点ずれやディスクのトラックに対す
る元スボ、ットα4のトラックずれが検知されると、そ
れぞれの検知最に応じて焦点制御用コイル(3)および
/またはトラッキング制御用コイル(5a)、 (sb
)、 (5c)、 (5d)に適宜の電流が与えられる
。これによって、第5図に示す矢印Qの焦点制御方向と
、矢印Pのトラッキング方向に、それぞれ第2の可動ホ
ルダ+21 、 、@ 1の可動ホルダ(4)が動作し
、応じて対物レンズ(1)のディスクに対する焦点ずれ
やトラックずれが調整される。
As shown in FIG. 3, the light is focused by the objective lens 111 and placed on the original spot α4 on the information recording surface (not shown) of the disk.
form. At this time, when the focus deviation of the original focus (04) with respect to the information recording surface of the disk or the track deviation of the original focus (α4) with respect to the track of the disk is detected, the focus control coil (3) is detected in accordance with each detection point. ) and/or tracking control coil (5a), (sb
), (5c), and (5d) are given appropriate currents. As a result, the second movable holder +21, , @1 movable holder (4) moves in the focus control direction of arrow Q and the tracking direction of arrow P shown in FIG. 5, and the objective lens (1) moves accordingly. ) is adjusted for defocus and track misalignment with respect to the disc.

以上、この発明全実施例に関連して説明したが。The above description has been made in relation to all the embodiments of this invention.

この発明の範囲はこの実施例に限られるものではない。The scope of the invention is not limited to this example.

たとえば、実施例では、軸(7a)、 (7b)を可動
ホルダ(4)に取り付けた場合を示したが、可動部分の
軽吐化を計るという意味で固定ホルダf12の軸受部1
:、11a)、 (11b)に固定しても良い。また。
For example, in the embodiment, a case is shown in which the shafts (7a) and (7b) are attached to the movable holder (4), but in order to reduce the discharge of the movable parts, the bearing part 1 of the fixed holder f12
:, 11a), (11b) may be fixed. Also.

上述の実施例では、磁性体板(10a)、 (10b)
を設けて1等価的にハーミアンスを向上させた。これに
よって永久磁石(9a)、 (9b)は、小さなもので
済むことになり、経済的であり、かつ装置の小型化全−
周進めることができるという利点があるが。
In the above embodiment, the magnetic plates (10a), (10b)
The hermeance was improved equivalently by 1. This allows the permanent magnets (9a) and (9b) to be small, which is economical and contributes to overall miniaturization of the device.
It has the advantage of being able to move forward.

これらの利点を望まないならば、磁性体板を設けなくて
も良い。またこの実施例では、焦点制御方向、トラック
制御方向ともに、支持部材が無くて済み、どちらの方向
ともリニアな特性を持つという利点があるが、中立位置
を得ることを望むならば!(7a)、 (7b)にバネ
を巻きつける。あるいはトラッキング制御方向の支持材
を設けるなどしても艮い。
If these advantages are not desired, the magnetic plate may not be provided. Moreover, this embodiment has the advantage that it does not require a support member in both the focus control direction and the track control direction, and has linear characteristics in both directions, but if you wish to obtain a neutral position! Wrap the spring around (7a) and (7b). Alternatively, it is also possible to provide a support member in the tracking control direction.

〔光力の効果〕[Effect of light power]

以上の様に、この発明によれば、焦点制御方向及びトラ
ッキング制御方向ともにリニア方式により制御を行なう
ため、比較的簡単に良好な伝達特性を得られるという効
果がある。また、光軸を傾けずに焦点方向制御とトラッ
キング方向制御を行なえるため、対物レンズが簡単な構
成で済み、安価にできるという効果がある。
As described above, according to the present invention, since the focus control direction and the tracking control direction are both controlled by a linear method, there is an effect that good transfer characteristics can be obtained relatively easily. Furthermore, since focal direction control and tracking direction control can be performed without tilting the optical axis, the objective lens can have a simple configuration and can be made at low cost.

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

第1図は従来の光学手段装置の概略図、第2図はこの発
明の一実施例の平面図、第3図は第2図のト」厳におけ
る断面図、第4図は第1図に示した光学手段駆動装置概
要を示す斜視図、第5図は第4図に示されたものの組立
て状態を示す分解斜視図である。 図において、(11は対物レンズ、(2)は第2の町!
初ホルダ、(3)は焦点fltl制御用コイル、(4)
は第1の可動ホルダ、 (5a)〜(5d)はトラッキ
ング制御用コイル、 (9a)、(9b)は永久磁石で
ある。 尚2図中同一符号は同−或いは相当部分を示す。
FIG. 1 is a schematic diagram of a conventional optical means device, FIG. 2 is a plan view of an embodiment of the present invention, FIG. FIG. 5 is an exploded perspective view showing an assembled state of the optical means driving device shown in FIG. In the figure, (11 is the objective lens, (2) is the second town!
First holder, (3) is the focus fltl control coil, (4)
is a first movable holder, (5a) to (5d) are tracking control coils, and (9a) and (9b) are permanent magnets. Note that the same reference numerals in the two figures indicate the same or equivalent parts.

Claims (3)

【特許請求の範囲】[Claims] (1)情報が記録されたディスク上の情報記録面に光ス
ポットを照射しながら、情報を光学的に読出す光学手段
を駆動するものであつて、前記ディスクの情報記録面に
対する光スポットの焦点ずれと、前記ディスクのトラッ
クに対する光スポットのトラックずれとを検知し、前記
焦点ずれ及び前記トラックずれのそれぞれの検知量に応
じて前記光学手段の位置を制御するように駆動する光学
手段駆動装置において、前記光学手段を保持する第1の
可動ホルダが、光軸方向に対して垂直でかつトラック方
向に垂直な方向に摺動自在に設けられると共に、前記第
1の可動ホルダ内に、光軸方向に対して摺動自在な第2
の可動ホルダが設けられ、前記光学手段は、前記可動ホ
ルダに配置され、前記第1の可動ホルダにはトラッキン
グ制御用のコイル手段が、前記第2の可動ホルダには焦
点制御用のコイル手段が設けられ、また、前記両コイル
手段と対向しながら、前記第1の可動ホルダの外側に永
久磁石が固定的に設けられたことを特徴とする、光学手
段駆動装置。
(1) A device that drives an optical means for optically reading information while irradiating a light spot onto an information recording surface of a disc on which information is recorded, the focus of the light spot on the information recording surface of the disc. In an optical means driving device that detects a deviation and a track deviation of a light spot with respect to a track of the disk, and drives the optical means so as to control the position of the optical means according to the respective detected amounts of the focus deviation and the track deviation. , a first movable holder for holding the optical means is provided so as to be slidable in a direction perpendicular to the optical axis direction and perpendicular to the track direction; the second which is slidable against the second
A movable holder is provided, the optical means is arranged on the movable holder, the first movable holder includes a coil means for tracking control, and the second movable holder includes a coil means for focus control. and a permanent magnet is fixedly provided on the outside of the first movable holder while facing both the coil means.
(2)光学手段は、対物レンズを含むことを特徴とする
、特許請求範囲第1項記載の光学手段駆動装置。
(2) The optical means driving device according to claim 1, wherein the optical means includes an objective lens.
(3)永久磁石の前記両コイル手段と対向する面とは反
対側の面にこの永久磁石の断面積より大きな断面積を有
する磁性体を取付けたことを特徴とする、特許請求の範
囲第1項記載の光学手段駆動装置。
(3) Claim 1, characterized in that a magnetic body having a cross-sectional area larger than the cross-sectional area of the permanent magnet is attached to a surface of the permanent magnet opposite to the surface facing the coil means. Optical means drive device as described in .
JP59222507A 1984-10-23 1984-10-23 Optical means driving device Expired - Lifetime JP2516738B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59222507A JP2516738B2 (en) 1984-10-23 1984-10-23 Optical means driving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59222507A JP2516738B2 (en) 1984-10-23 1984-10-23 Optical means driving device

Publications (2)

Publication Number Publication Date
JPS61104339A true JPS61104339A (en) 1986-05-22
JP2516738B2 JP2516738B2 (en) 1996-07-24

Family

ID=16783508

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59222507A Expired - Lifetime JP2516738B2 (en) 1984-10-23 1984-10-23 Optical means driving device

Country Status (1)

Country Link
JP (1) JP2516738B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5965944A (en) * 1982-10-06 1984-04-14 Alps Electric Co Ltd Objective lens driving device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5965944A (en) * 1982-10-06 1984-04-14 Alps Electric Co Ltd Objective lens driving device

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Publication number Publication date
JP2516738B2 (en) 1996-07-24

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