JPH0656667B2 - Optical recording / reproducing device - Google Patents
Optical recording / reproducing deviceInfo
- Publication number
- JPH0656667B2 JPH0656667B2 JP60000893A JP89385A JPH0656667B2 JP H0656667 B2 JPH0656667 B2 JP H0656667B2 JP 60000893 A JP60000893 A JP 60000893A JP 89385 A JP89385 A JP 89385A JP H0656667 B2 JPH0656667 B2 JP H0656667B2
- Authority
- JP
- Japan
- Prior art keywords
- pickup
- disc
- disk
- optical recording
- radial direction
- 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 - Lifetime
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
【発明の詳細な説明】 〔発明の利用分野〕 本発明は、ビデオデイスクプレーヤとかコンパクトデイ
スクプレーヤ等として知られる光学式記録再生装置に関
するものであり、更に詳しくは、デイスクの歪が大きい
場合の該デイスクからの情報再生に関するものである。Description: FIELD OF THE INVENTION The present invention relates to an optical recording / reproducing device known as a video disc player, a compact disc player, or the like. More specifically, the present invention relates to an optical recording / reproducing device having a large distortion. It relates to information reproduction from the disk.
一般にビデオデイスクプレーヤ等の光学式記録再生装置
において、情報再生に用いる収束光の光軸がデイスク面
に対して垂直に交わらない場合、収束光のスポツト形状
に収差が生じる。そしてそれによってデイスク面上で隣
接トラツクの情報が再生中の当該トラツクの情報に漏れ
込み、クロストークが発生する。Generally, in an optical recording / reproducing apparatus such as a video disc player, when the optical axis of the convergent light used for reproducing information does not intersect perpendicularly to the disk surface, aberration occurs in the spot shape of the convergent light. Then, the information of the adjacent track leaks into the information of the track being reproduced on the disk surface, and crosstalk occurs.
以下、かかる従来の技術的事情について、第２図、第３
図を参照して説明する。The conventional technical circumstances will be described below with reference to FIGS.
It will be described with reference to the drawings.
第２図は従来の光学式記録再生装置における本発明に関
係した要部を模式的に示した説明図であり、第３図はデ
イスクが歪んでいる場合の同様な説明図である。FIG. 2 is an explanatory view schematically showing a main part related to the present invention in a conventional optical recording / reproducing apparatus, and FIG. 3 is a similar explanatory view when a disk is distorted.
第２図において、１はピツクアツプ、２は対物レンズ、
（３−１）はデイスク、４は光軸、５はピツクアップ１
の回動支点、６はスライダ用ベース、７はデイスク用モ
ータ、８は対物レンズサスペンション、９は光束、であ
る。In FIG. 2, 1 is a pickup, 2 is an objective lens,
(3-1) is a disk, 4 is an optical axis, 5 is a pick-up 1
Is a rotation fulcrum, 6 is a slider base, 7 is a disk motor, 8 is an objective lens suspension, and 9 is a light beam.
モータ７によつて回転駆動されているデイスク（３−
１）に対してピツクアツプ１から対物レンズ２を介して
光束９が照射され、該デイスク（３−１）から記録情報
の再生が行なわれるわけであるが、その際、スライダ用
ベース６が矢印Ｓ方向に移動してピツクアツプ１をデイ
スク（３−１）の半径方向に移動させる。A disk (3- that is rotationally driven by a motor 7
1), the light beam 9 is emitted from the pickup 1 through the objective lens 2 and the recorded information is reproduced from the disk (3-1). At that time, the slider base 6 causes the arrow S to move. In the radial direction of the disk (3-1).
所で第３図に見られるように、デイスク（３−２）がそ
の半径方向に歪み、変形して皿状になつているときは、
ピツクアツプ１からデイスク（３−２）に照射される光
束９の光軸４が皿状に変形したデイスク（３−２）に対
しても常に垂直になるように、デイスク（３−２）に歪
量を検出しそれに応じてピツクアツプ１を傾け制御する
手段が採用されている。As shown in FIG. 3, when the disk (3-2) is distorted in the radial direction and deformed into a dish shape,
The disk (3-2) is distorted so that the optical axis 4 of the light beam 9 emitted from the pickup 1 to the disk (3-2) is always perpendicular to the disk (3-2) deformed into a dish shape. A means for detecting the amount and controlling the tilt of the pick-up 1 in accordance therewith is adopted.
その際従来は光軸４上の点を回動支点としてピツクアツ
プ１を傾けていた。そのためデイスクの歪に応じて上下
動する光束収束用対物レンズ２のダイナミツクレンジは
第２図に示したl1から第３図に示したl2へと小さくな
り、大きな歪を有するデイスクからの情報再生が不可能
となつていた。At that time, conventionally, the pick-up 1 is tilted with a point on the optical axis 4 as a pivot. Therefore, the dynamic range of the objective lens 2 for converging the light flux, which moves up and down according to the distortion of the disk, decreases from l 1 shown in FIG. 2 to l 2 shown in FIG. The information could not be reproduced.
なおこの種の装置の公知例として、特開昭５７−１９５
３４０号公報を挙げることができる。A known example of this type of apparatus is disclosed in Japanese Patent Laid-Open No. 57-195.
No. 340 can be cited.
本発明は上述の如き従来技術における問題点を解決する
ためになされたものであり、従つて本発明の目的は、歪
量の大きいデイスクに対して、光束を収束させる対物レ
ンズのダイナミツクレンジを減少させることなく、ピツ
クアツプを傾けることを可能にした光学式記録再生装置
を提供することにある。The present invention has been made to solve the problems in the prior art as described above. Therefore, an object of the present invention is to provide a dynamic range of an objective lens that converges a light beam with respect to a disk having a large distortion amount. It is an object of the present invention to provide an optical recording / reproducing apparatus capable of tilting the pickup without reducing the number.
上記目的を達成するため、本発明においては、ピツクア
ツプの傾けの支点を、対物レンズのレンズ面位置よりも
デイスク面から遠去かつた位置において、デイスク半径
方向において光軸に対してデイスクの内周側に移動させ
た。In order to achieve the above object, in the present invention, the fulcrum of the tilt of the pickup is located farther from the disk surface than the lens surface position of the objective lens, and the inner circumference of the disk with respect to the optical axis in the disk radial direction. Moved to the side.
次に図を参照して本発明の実施例を説明する。 Next, an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例の要部を示す説明図である。
同図において、第２図、第３図におけるのと同じ要素に
は同じ符号を付してある。FIG. 1 is an explanatory diagram showing a main part of an embodiment of the present invention.
In the figure, the same elements as those in FIGS. 2 and 3 are designated by the same reference numerals.
第１図において、デイスク（３−２）に皿状に歪んでお
り、モータ７上で回転している。１はすでに説明したよ
うに、収束光９をデイスク（３−２）に照射しデイスク
内の情報を読みとるピツクアツプである。In FIG. 1, the disk (3-2) is distorted like a dish and is rotating on the motor 7. As described above, reference numeral 1 is a pickup which irradiates the disk (3-2) with the convergent light 9 to read the information in the disk.
ピツクアツプ１は光学部品（図示せず）およびデイスク
面上に収束光を結ぶ対物レンズ２等から構成され、該対
物レンズ２はサスペンシヨン８でピツクアツプ１に対し
て懸架されている。また上記ピツクアツプ１は、デイス
クの内外周（矢印）Ｓ方向に移動できるようにスライダ
機構６の上に搭載されており、さらに該ピツクアツプ１
は光軸４に対して、デイスクの内周側に距離Ｍだけ離れ
た位置にある支点５のまわりに回動できるよう支持され
ている。The pick-up 1 is composed of an optical component (not shown) and an objective lens 2 for converging convergent light on a disk surface. The objective lens 2 is suspended by a suspension 8 with respect to the pick-up 1. The pick-up 1 is mounted on a slider mechanism 6 so as to be movable in the inner and outer circumferences (arrows) S of the disk, and the pick-up 1 is further mounted.
Is supported so as to be rotatable around a fulcrum 5 located at a distance M on the inner peripheral side of the disk with respect to the optical axis 4.
光軸４がデイスク面に垂直になるよう、デイスクの歪量
検出信号（検出手段は図示せず）によりピツクアツプ１
の傾きは制御される。The disk 1 is picked up by a disk distortion amount detection signal (detection means is not shown) so that the optical axis 4 becomes perpendicular to the disk surface.
The slope of is controlled.
本発明によれば、ピツクアツプ１の回動支点５が、対物
レンズ９のレンズ面位置よりもデイスク（３−２）面か
ら遠去かつた位置において、デイスク半径方向で、デイ
スク（３−２）の内周側にオフセンタしているため、従
来技術と比較して対物レンズ２のダイナミツクレンジｌ
の減少という問題は大幅に改善され、また回動支点５が
デイスク面に接触して損傷を生じる恐れも発生しないこ
とが認められるであろう。According to the present invention, when the rotation fulcrum 5 of the pick-up 1 is farther from the disk (3-2) surface than the lens surface position of the objective lens 9, the disk (3-2) is located in the disk radial direction. Since it is off-centered on the inner peripheral side, the dynamic range l of the objective lens 2 is
It will be appreciated that the problem of the reduction of ∘ is greatly improved and there is no risk of the pivot fulcrum 5 contacting the disk surface and causing damage.
本発明によれば、前述の如く、対物レンズのダイナミツ
クレンジを損うことなく大きい歪を有するデイスクに対
して光束を追従させることができるので、光学式記録再
生装置のセツトとしての性能および信頼性を向上させる
ことができる。According to the present invention, as described above, the light flux can be made to follow a disk having a large distortion without impairing the dynamic range of the objective lens, so that the performance and reliability as a set of the optical recording / reproducing apparatus can be improved. It is possible to improve the sex.
第１図は本発明の一実施例の要部を示す説明図、第２図
は従来の光学式記録再生装置における本発明に関係した
要部を示す説明図、第３図はデイスクに歪がある場合の
同説明図、である。 符号説明 １……ピツクアツプ、２……対物レンズ、３，（３−
１），（３−２）……デイスク、４……光軸、５……ピ
ツクアツプ回動支点、６……スライダ用ベース、７……
デイスク用モータ、８……対物レンズサスペンシヨン、
９……光束FIG. 1 is an explanatory view showing an essential part of an embodiment of the present invention, FIG. 2 is an explanatory view showing an essential part relating to the present invention in a conventional optical recording / reproducing apparatus, and FIG. It is the same explanatory view in a certain case. Explanation of symbols 1 ... Pickup, 2 ... Objective lens, 3, (3-
1), (3-2) ... Disc, 4 ... Optical axis, 5 ... Pickup rotation fulcrum, 6 ... Slider base, 7 ...
Disk motor, 8 ... Objective lens suspension,
9 ... Luminous flux
Claims (1)
せ、該ディスク面にピックアップから収束光を照射し、
かつ該ピックアップを前記ディスク面上で半径方向に移
動させることにより、前記ディスク面に情報を記録し、
或いは該ディスク面から情報を再生するようにした光学
式記録再生装置において、 前記ディスクの半径方向に沿った歪を検出する手段と、
前記ディスクの半径方向に移動する前記ピックアップか
らの収束光の光軸が前記ディスク面に対して常に直交す
るように、前記歪検出手段によって検出された歪量に従
って前記ピックアップをその支持体に対して傾ける手段
と、を具備し、 かつ前記傾け手段において、前記ピックアップの傾け支
点が、該ピックアップからの収束光発生用対物レンズの
レンズ面位置よりも更に前記ディスク面から遠ざかった
位置で、かつディスク半径方向において光軸位置より内
側に離間した前記ピックアップ上の位置、に該ピックア
ップと共に移動可能に設けられていることを特徴とする
光学式記録再生装置。1. A disc as an information recording medium is rotated, and convergent light is emitted from a pickup onto the disc surface.
And by moving the pickup in the radial direction on the disk surface, information is recorded on the disk surface,
Alternatively, in an optical recording / reproducing apparatus adapted to reproduce information from the disc surface, means for detecting distortion along the radial direction of the disc,
According to the strain amount detected by the strain detecting means, the pickup is supported with respect to its support so that the optical axis of the converged light from the pickup moving in the radial direction of the disc is always orthogonal to the disc surface. Tilting means, wherein the tilting fulcrum of the pickup is further away from the disc surface than the lens surface position of the convergent light generation objective lens from the pickup, and the disc radius. An optical recording / reproducing device, wherein the optical recording / reproducing device is provided so as to be movable together with the pickup at a position on the pickup that is spaced inward from the optical axis position in the direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60000893A JPH0656667B2 (en) | 1985-01-09 | 1985-01-09 | Optical recording / reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60000893A JPH0656667B2 (en) | 1985-01-09 | 1985-01-09 | Optical recording / reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61160844A JPS61160844A (en) | 1986-07-21 |
| JPH0656667B2 true JPH0656667B2 (en) | 1994-07-27 |
Family
ID=11486357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60000893A Expired - Lifetime JPH0656667B2 (en) | 1985-01-09 | 1985-01-09 | Optical recording / reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0656667B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8500592A (en) * | 1985-03-04 | 1986-10-01 | Philips Nv | ELECTRO-OPTICAL DEVICE. |
| DE69517127T2 (en) | 1994-10-31 | 2001-01-25 | Matsushita Electric Industrial Co., Ltd. | Tilt sensor, optical plate, and tilt compensation method for performing stable tilt compensation control, and apparatus for using the same |
| KR100231645B1 (en) * | 1996-10-30 | 1999-11-15 | 배순훈 | Pickup unit of optical disc player |
| TWI260013B (en) | 2003-12-04 | 2006-08-11 | Mediatek Inc | Optical incidence auto-adjusting system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57199904A (en) * | 1981-06-03 | 1982-12-08 | Matsushita Electric Ind Co Ltd | Inclination controller |
| JPS59189730U (en) * | 1983-06-03 | 1984-12-15 | ソニー株式会社 | optical disc device |
| JPS6077028U (en) * | 1983-11-02 | 1985-05-29 | パイオニア株式会社 | Optical recording disc playback device |
-
1985
- 1985-01-09 JP JP60000893A patent/JPH0656667B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61160844A (en) | 1986-07-21 |
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