JPS63239622A - Optical pickup - Google Patents
Optical pickupInfo
- Publication number
- JPS63239622A JPS63239622A JP7307387A JP7307387A JPS63239622A JP S63239622 A JPS63239622 A JP S63239622A JP 7307387 A JP7307387 A JP 7307387A JP 7307387 A JP7307387 A JP 7307387A JP S63239622 A JPS63239622 A JP S63239622A
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- recording
- optical pickup
- reproducing medium
- optical
- 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
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 41
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation 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
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野］
本発明は記録再生媒体に光スポットを投影して情報の書
き込みあるいは読み取りを行なう光学的記録再生装置、
特に光学ピックアップに関する。Detailed Description of the Invention [Industrial Application Field] The present invention relates to an optical recording/reproducing device that writes or reads information by projecting a light spot onto a recording/reproducing medium;
Especially regarding optical pickups.
［従来の技術］
一般に、この種の光学的記録再生装置においては、精度
よく情報の書き込みまたは読み取りを行なうために光ス
ポットを最小限に記録再生媒体上に絞り込む必要があり
、そのためには対物レンズの光軸と記録再生媒体面とを
垂直にしなければならない。[Prior Art] Generally, in this type of optical recording/reproducing device, in order to accurately write or read information, it is necessary to narrow down the light spot onto the recording/reproducing medium to a minimum. The optical axis of the recording/reproducing medium must be perpendicular to the surface of the recording/reproducing medium.
従来、この種の光学ピックアップにおいては、第４図及
び第５図に示す如く、対物レンズ駆動装置２を光学ピッ
クアップケース３に取り付けるには該対物レンズ駆動装
置２と該光学ピックアップケース３との間にコイルバネ
４ａ〜４ｄを介在させることにより、取り付はネジ６ａ
〜６ｄの締め付は具合によって該対物レンズ駆動装置２
を傾けて対物レンズ１の光軸が該光学ピックアップケー
ス３に対して垂直になるように調整するようになってい
る。Conventionally, in this type of optical pickup, as shown in FIGS. 4 and 5, in order to attach the objective lens drive device 2 to the optical pickup case 3, a By interposing the coil springs 4a to 4d, the installation can be done using the screws 6a.
~6d may be tightened depending on the condition of the objective lens drive device 2.
The optical axis of the objective lens 1 is adjusted to be perpendicular to the optical pickup case 3 by tilting the optical pickup case 3.
５ａ〜５ｄは対物レン駆動装置２に設けたネジ穴である
。5a to 5d are screw holes provided in the objective lens driving device 2.
［発明が解決しようとする問題点］
上述した従来の光学ピックアップは、組み立ての途中で
対物レンズ１の光軸の傾きを調整するようになっている
ので、それ以降の組み立ての要因により該光軸の傾きが
発生したり、記録再生媒体が反っていることに起因して
該光軸と記録再生面とが垂直にならないという欠点があ
る。特に記録再生媒体の反りによるものは、媒体個々に
より反り方向や反り量が異なるので、媒体間おるいは装
置間においてその互換性に大きな影響を及ぼす。[Problems to be Solved by the Invention] In the conventional optical pickup described above, the inclination of the optical axis of the objective lens 1 is adjusted during assembly. There is a drawback that the optical axis and the recording/reproducing surface are not perpendicular to each other due to the occurrence of a tilt or the warping of the recording/reproducing medium. In particular, warping of recording/reproducing media differs in the direction and amount of warping depending on the individual medium, which greatly affects compatibility between media or devices.
本発明の目的は前記問題点を解消した光学ピックアップ
を提供することにある。An object of the present invention is to provide an optical pickup that solves the above problems.
［問題点を解決するための手段］
本発明は光学ピックアップにおいて、対物レンズ駆動装
置と光学ピックアップケースとを複数個のコイルバネと
ネジと圧電素子とを介在して結合したことを特徴とする
光学ピックアップである。[Means for Solving the Problems] The present invention provides an optical pickup characterized in that an objective lens drive device and an optical pickup case are coupled via a plurality of coil springs, screws, and piezoelectric elements. It is.
［実施例］ 次に、本発明について図面を参照して説明する。[Example] Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例の分解斜視図、第２図は概略
縦断面図である。対物レンズ１は対物レンズ駆動装置２
によりフォーカスあるいはトラック方向に移動させられ
る。上記対物レンズ駆動装置２は光学ピックアップケー
ス３にネジ６ａ、 ６ｂ。FIG. 1 is an exploded perspective view of one embodiment of the present invention, and FIG. 2 is a schematic longitudinal sectional view. Objective lens 1 is objective lens drive device 2
It is moved in the focus or track direction. The objective lens driving device 2 has screws 6a and 6b attached to the optical pickup case 3.
６Ｃ，６ｄとネジ穴５ａ、 ５ｂ、 ５Ｃ，５ｄとによ
り連結されており、また該対物レンズ駆動装置２と該光
学ピックアップケース３との間にはその中心に該ネジ６
ａ、 ８ｂ、 ６ｃ、 ６ｄを通したコイルバネ４ａ、
４ｂ、 ４ｃ。6C, 6d and screw holes 5a, 5b, 5C, 5d, and the screw 6 is located at the center between the objective lens driving device 2 and the optical pickup case 3.
Coil spring 4a passed through a, 8b, 6c, 6d,
4b, 4c.
４ｄを具備しておりかつ該ネジ６ａ、 ６ｂ、 ６ｃ、
６ｄの頭と該光学ピックアップケースとの間には円筒
状の圧電素子７ａ、 ７ｂ、 ７ｃ、 ７ｄを備えてい
る。ここで、まずネジ６ａ、 ６ｂ、 ６ｃ、 ６ｄを
締め付けてコイルバネ４ａ、 ４ｂ、 ４Ｃ，４ｄによ
り対物レンズ駆動装置２を押し上げる状態となるように
組み立てる。このとき、対物レンズ１への入射光１１は
光学ピックアップケース３に対して垂直になるようにあ
らかじめ調整されており、また対物レンズ１の光軸が光
学ピックアップケース３に対して垂直につまり出射光１
２が光学ピックアップケース３に対して垂直になる様に
該ネジ６ａ、 ６ｂ、 ６ｃ、 ８ｄの締め付は力をそ
れぞれ調整する。4d and the screws 6a, 6b, 6c,
Cylindrical piezoelectric elements 7a, 7b, 7c, and 7d are provided between the head of 6d and the optical pickup case. First, the screws 6a, 6b, 6c, and 6d are tightened to assemble the objective lens drive device 2 so that it is pushed up by the coil springs 4a, 4b, 4C, and 4d. At this time, the incident light 11 to the objective lens 1 is adjusted in advance so that it is perpendicular to the optical pickup case 3, and the optical axis of the objective lens 1 is perpendicular to the optical pickup case 3, so that the output light 1
The tightening force of the screws 6a, 6b, 6c, and 8d is adjusted so that the screws 2 are perpendicular to the optical pickup case 3.
このようにして組み立てられた光学ピックアップを光学
的記録再生装置に実装する。ここで、仮に記録再生媒体
１０が第３図に示す如く右側へ傾いていると、圧電素子
７ｂ、 ７ｄに正の圧電素子７ａ、 ７ｃに負の電圧を
かけ対物レンズ１の光軸が記録再生媒体１Ｇに対して垂
直になるようにし、出射光１２が記録再生媒体１０上に
最小限の光スポットを結ぶようになる。The optical pickup assembled in this way is mounted on an optical recording/reproducing device. Here, if the recording/reproducing medium 10 is tilted to the right as shown in FIG. The emitted light 12 is made to be perpendicular to the medium 1G, so that the emitted light 12 forms a minimum optical spot on the recording/reproducing medium 10.
［発明の効果１
以上説明したように本発明は対物レンズ駆動装置と光学
ピックアップケースとを複数個のコイルバネとネジと圧
電素子とを介在して結合することにより、光学ピックア
ップを光学的記録再生装置に実装した侵に記録再生媒体
個々に合わせて記録再生媒体と対物レンズの光軸とを垂
直にでき、記録再生媒体面上に最小限な光スポットを結
ばせることができ、精度よく情報の白き込みまたは読み
取りができる効果がある。[Effects of the Invention 1] As explained above, the present invention connects an objective lens driving device and an optical pickup case through a plurality of coil springs, screws, and piezoelectric elements, thereby converting an optical pickup into an optical recording/reproducing device. The optical axis of the recording and reproducing medium and the objective lens can be made perpendicular to each other according to each recording and reproducing medium, and the minimum light spot can be focused on the surface of the recording and reproducing medium. It has the effect of being readable or readable.
第１図は本発明の一実施例の分解斜視図、第２図は同概
略断面図、第３図は媒体が傾いている場合の概略断面図
、第４図は従来の光学ピックアップの分解斜視図、第５
図は従来の光学ピックアップの概略断面図である。
１・・・対物レンズ ２・・・対物レンズ駆動装置
３・・・光学ピックアップケース
４ａ、 ４ｂ、 ４ｃ、 ４ｄ−ｓイルハネ５ａ、 ５
ｂ、 ５ｃ、 ５ｄ−・・ネジ穴。
６ａ、 ６ｂ、 ６ｃ、 ８ｄ−・・ネジ７ａ、 ７ｂ
、 ７ｃ、 ７ｄ−・・圧電素子１０・・・記録再生媒
体 １１・・・入射光１２・・・出射光Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2 is a schematic sectional view of the same, Fig. 3 is a schematic sectional view when the medium is tilted, and Fig. 4 is an exploded perspective view of a conventional optical pickup. Figure, 5th
The figure is a schematic cross-sectional view of a conventional optical pickup. 1... Objective lens 2... Objective lens drive device 3... Optical pickup case 4a, 4b, 4c, 4d-s illumination 5a, 5
b, 5c, 5d--Screw holes. 6a, 6b, 6c, 8d--Screws 7a, 7b
, 7c, 7d-...Piezoelectric element 10...Recording/reproducing medium 11...Incoming light 12...Outgoing light
Claims (1)
と光学ピックアップケースとを複数個のコイルバネとネ
ジと圧電素子とを介在して結合したことを特徴とする光
学ピックアップ。(1) An optical pickup characterized in that an objective lens drive device and an optical pickup case are coupled via a plurality of coil springs, screws, and piezoelectric elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7307387A JPS63239622A (en) | 1987-03-27 | 1987-03-27 | Optical pickup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7307387A JPS63239622A (en) | 1987-03-27 | 1987-03-27 | Optical pickup |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63239622A true JPS63239622A (en) | 1988-10-05 |
Family
ID=13507786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7307387A Pending JPS63239622A (en) | 1987-03-27 | 1987-03-27 | Optical pickup |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63239622A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0337829A (en) * | 1989-07-05 | 1991-02-19 | Mitsubishi Electric Corp | Optical head |
-
1987
- 1987-03-27 JP JP7307387A patent/JPS63239622A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0337829A (en) * | 1989-07-05 | 1991-02-19 | Mitsubishi Electric Corp | Optical head |
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