JPS5928249A - Optical disk device - Google Patents
Optical disk deviceInfo
- Publication number
- JPS5928249A JPS5928249A JP13672582A JP13672582A JPS5928249A JP S5928249 A JPS5928249 A JP S5928249A JP 13672582 A JP13672582 A JP 13672582A JP 13672582 A JP13672582 A JP 13672582A JP S5928249 A JPS5928249 A JP S5928249A
- Authority
- JP
- Japan
- Prior art keywords
- eccentricity
- positioner
- degree
- optical disk
- 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
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
- G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
- G11B7/0953—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for eccentricity of the disc or disc tracks
Abstract
Description
【発明の詳細な説明】
本発明は、光ディスクの記憶面にあらかじめ設けられて
いる同心円状の基準溝に沿って情報の書込みまたは読取
シを行う光デイスク装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical disc device that writes or reads information along concentric reference grooves provided in advance on a storage surface of an optical disc.
光デイスク装置における情報の書込みおよび読出しは、
情報の書込みの基準となる基準溝（以下プリグループと
いう）をあらかじめ光ディスクの記憶面に設けておき、
とのプリグループに対して光ヘッドを担持している位置
決め装置（以下ポジショナ−という）を位置決めし、光
ディスクの回転に伴うポジショナ−とプリグループの相
対的な位置関係の微細な変動に対して光ヘッドを微細に
調整しながら書込みおよび読出しを行う構成を有してい
る。Writing and reading information in an optical disk device is
A reference groove (hereinafter referred to as pre-group), which serves as a reference for writing information, is provided in advance on the storage surface of the optical disc.
A positioning device (hereinafter referred to as a positioner) carrying an optical head is positioned with respect to the pre-group with the optical disc, and the optical It has a configuration in which writing and reading are performed while finely adjusting the head.
しかしながら、現在情報の記憶媒体として用いられてい
る光ディスク（以下媒体という）は、新たな情報の書込
みとその書込んだ情報の読出しはできるが、一旦書込ん
だ情報を消去したシ書替えたシすることができないため
、１枚の媒体に情報が入シきらなくなったときは新たな
媒体を光デイスク装置に掛替える必要がある。However, optical disks (hereinafter referred to as media) currently used as information storage media can write new information and read the written information, but they cannot be used to erase or rewrite the written information. Therefore, when there is no longer enough information to fit on one medium, it is necessary to replace the optical disk device with a new medium.
この媒体の掛替えにともなって、プリグループの中心と
光デイスク装置における媒体の回転中心との間に偏心が
生じ、また媒体のプリグループ自体にもその製造時に生
ずる偏心があるため、これらの偏心量は時には相当の量
（０，ｌｙ＋＋を程度）に達する。As the medium is replaced, eccentricity occurs between the center of the pre-group and the center of rotation of the medium in the optical disk device, and the medium pre-group itself also has eccentricity that occurs during its manufacture. The amount sometimes reaches considerable amounts (of the order of 0, ly++).
従来の光デイスク装置は、上記の偏心に対処するだめ、
光ヘッドの対物レンズをプリグループの偏心運動に追随
して動くように制御できる構成を有しているが、対物レ
ンズのみを大きく動かすと、光源であるレーザー光の光
軸と対物レンズの光軸との間にずれが生ずるため反射光
に収差を生じ、従って反射光による出力信号の出力が低
下して追随運動が不安定となるので、常に対物レンズが
その目標とするプリグループの真下にあるように、光学
ヘッドの位置調整動作とこの光学ヘッドを担持している
ポジショナ−の位置決め動作とを同時に制御する制御手
段が用いられている。このため従来の光デイスク装置の
光ヘッドの位置決め制御手段は複雑な構成となっている
。Conventional optical disk devices cannot deal with the above-mentioned eccentricity.
The objective lens of the optical head has a configuration that can be controlled to move to follow the eccentric movement of the pre-group, but if only the objective lens is moved significantly, the optical axis of the laser beam that is the light source and the optical axis of the objective lens will change. This causes aberrations in the reflected light, which reduces the output signal output from the reflected light and makes the tracking movement unstable, so the objective lens is always directly below the target pre-group. Thus, a control means is used that simultaneously controls the position adjustment operation of the optical head and the positioning operation of the positioner supporting the optical head. For this reason, the optical head positioning control means of the conventional optical disk device has a complicated structure.
従って本発明の目的は、上記の欠点を除去して簡単な構
成で安定性の高い光ヘッドの位置決め制御手段を備える
光デイスク装置を提供することにある。SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an optical disk device which eliminates the above-mentioned drawbacks and is equipped with a simple structure and highly stable optical head positioning control means.
本発明の光デイスク装置は、あらかじめ設けられた同心
円状の複数の基準溝を有する光ディスクの前記基準溝に
対する焦点調整装置と位置調整装置とを有する光学ヘッ
ドと、前記光学ヘッドを前記基準溝に対して位置決めを
行う位置決め装置とを備える光デイスク装置において、
前記光ディスクの前記基準溝の中心と前記光ディスクが
前記光デイスク装置に装着されたときの前記光ディスク
の回転中心との偏心量を検出する検出手段と、前記偏心
量を記憶する記憶手段とを備えて構成される。The optical disc device of the present invention includes an optical head having a focus adjustment device and a position adjustment device with respect to the reference groove of an optical disc having a plurality of concentric reference grooves provided in advance; In an optical disk device equipped with a positioning device that performs positioning,
A detecting means for detecting an eccentricity between the center of the reference groove of the optical disk and a center of rotation of the optical disk when the optical disk is mounted in the optical disk device, and a storage means for storing the eccentricity. configured.
以下、本発明について図面を参照して詳細に説明する。Hereinafter, the present invention will be explained in detail with reference to the drawings.
図において本発明の一実施例を一部説明図を含むブ四ツ
ク図で示すように、プリグループ１７を有する媒体１６
は光デイスク装置に装着されて回転させられるが、この
ときの回転の中心軸１６−ａと、プリグループ１７の中
心軸１６−ｂとの間には偏心量δの偏心がある。As shown in the drawing, an embodiment of the present invention is shown in a block diagram including a partial explanatory diagram, a medium 16 having a pre-group 17 is shown.
is mounted on an optical disk device and rotated, but there is an eccentricity δ between the central axis of rotation 16-a and the central axis 16-b of the pre-group 17.
一方、プリグループ１７に追随してこれに情報の誉込み
または読出しを行う光学ヘッド２を担持するポジショナ
−１には、ポジショナ−１のプリグループ１７の選択位
置を検出するための位置検出センサ１１が付設されてお
シ、その出力信号は検出回路１２を介して制御回路８に
入力される。On the other hand, the positioner 1 carrying the optical head 2 that follows the pre-group 17 and reads out information from the pre-group 17 has a position detection sensor 11 for detecting the selected position of the pre-group 17 of the positioner 1. The output signal thereof is input to the control circuit 8 via the detection circuit 12.
また、ポジショナ−１には偏心量検出センサ４が設けら
れておシ、その出力信号は検出回路５を介して記憶回路
６に入力されて記憶され、記憶回路６に記憶された偏心
量に関する情報は制御回路８０指令によって読出されて
制御回路８に入力される。検出回路１２と記憶回路６と
からの入力信号および外部からの指令信号を受ける制御
回路８は、これらの信号によって位置決め信号を生成し
て増幅回路９を介してポジショナ−１に送出スる。Further, the positioner 1 is provided with an eccentricity detection sensor 4, the output signal of which is inputted to and stored in a memory circuit 6 via a detection circuit 5, and information regarding the eccentricity stored in the memory circuit 6. is read out by the control circuit 80 command and inputted to the control circuit 8. A control circuit 8 receiving input signals from the detection circuit 12 and the memory circuit 6 and a command signal from the outside generates a positioning signal based on these signals and sends it to the positioner 1 via the amplifier circuit 9.
上記のように構成された光デイスク装置は次のように動
作する。The optical disc device configured as described above operates as follows.
まず、媒体１６が光デイスク装置に装着される５−
と、ポジショナ−１は制御回路８０指令により光ヘッド
の対物レンズの光軸とレーザ光の光軸とを一致させた状
態でプリグループ１７のうちの指定されたプリグループ
に位置決めされる。この状態において媒体１６が１回転
するとボジシ目ナー１はプリグループの偏心に追随して
動き、その動作量は偏心量検出センサ４によって検出さ
れて検出回路５に送出され、検出回路５はこの検出信号
を受けて増幅変調して記憶回路６に偏心量として送出し
、記憶回路６は次の媒体の偏心量が入力される迄または
制御回路から消去指令が送られてぐる迄これを記憶して
おく。First, when the medium 16 is loaded into the optical disk device 5-, the positioner 1 aligns the optical axis of the objective lens of the optical head with the optical axis of the laser beam according to a command from the control circuit 80, and moves the pregroup 17 to the positioner 1. Positioned in the specified pregroup. In this state, when the medium 16 rotates once, the edger 1 moves to follow the eccentricity of the pre-group, and the amount of movement is detected by the eccentricity detection sensor 4 and sent to the detection circuit 5. The signal is received, amplified and modulated, and sent to the storage circuit 6 as an eccentricity amount, and the storage circuit 6 stores this until the eccentricity amount of the next medium is input or until an erasure command is sent from the control circuit. put.
上述の偏心量の計測とその記憶保存が終了すると、光デ
イスク装置は通常の書込みまたは読出し動作のためポジ
ショナ−１の位置決め動作を行う。When the above-mentioned eccentricity measurement and storage are completed, the optical disk device performs a positioning operation of the positioner 1 for a normal write or read operation.
すなわち制御回路８は外部からの指令信号１０１を受け
ると、増幅回路９を介してポジショナ−１に指令信号を
送り、ポジシ冒す−１はこの指令信号を受けて所定のプ
リグループの位置に移動されて位置決めされる。この位
置決め動作は位置検出セ６−
ンサ１１とその出力を受けてこれを増幅変調して制御回
路８に出力する検出回路１２によって制御される。That is, when the control circuit 8 receives a command signal 101 from the outside, it sends a command signal to the positioner 1 via the amplifier circuit 9, and the positioner 1 receives this command signal and moves to a predetermined pre-group position. position. This positioning operation is controlled by a position detection sensor 11 and a detection circuit 12 which receives its output, amplifies and modulates it, and outputs it to the control circuit 8.
ボジシ胃ナー１が所定のプリグループの位置に位置決め
されて媒体１が１回転すると、プリグループ１７とボジ
シ田す−１との相対位置はプリクループ１７の偏心量δ
によってずれを生ずるが、とのずれは制御回路８からの
読出し指令信号をによって記憶回路６に記憶されている
偏心量データを逐次読出し、これをボジシ日す−１に送
出して位置補正をさせることによって補正されるので、
光ヘッド２は常にプリグループ３の直下の位置が保持さ
れる。When the body 1 is positioned at a predetermined pre-group position and the medium 1 rotates once, the relative position between the pre-group 17 and the body 1 is determined by the eccentricity δ of the pre-croop 17.
This causes a deviation, but the deviation is caused by a read command signal from the control circuit 8, which sequentially reads out the eccentricity data stored in the storage circuit 6, and sends it to the position controller 1 to correct the position. It is corrected by
The optical head 2 is always maintained at a position directly below the pre-group 3.
以上の偏心による位置ずれの補正はプリグループ全体の
平均的な偏心量について行われるので、個々のプリグル
ープの偏心量の微細な差異については、光学ヘッド２に
設けられている位置検出センサー（図示せず）によって
検出されてボジシ目ナー１上での光学ヘッド２の位置調
整が行われる。The above correction of positional deviation due to eccentricity is performed on the average amount of eccentricity of the entire pre-group, so minute differences in the amount of eccentricity of individual pre-groups can be corrected using the position detection sensor (Fig. (not shown), and the position of the optical head 2 on the sharpener 1 is adjusted.
これによって対物レンズ３の光軸と光源であるレアー
？ Ｊ−１７４−Ｌ＋−Ａ−Ｍ、５１．ａｙ４ フープ
光の光軸との間に若干のずれが生ずるが、個々のプリグ
ループの偏心量は、プリグループ全体の平均的な偏心量
に比べて極めて小さいので、上記のずれの影響は実質上
無視できる程度である。This allows the optical axis of the objective lens 3 and the rare? J-174-L+-A-M, 51. ay4 A slight deviation occurs between the optical axis of the hoop light, but since the amount of eccentricity of each individual pre-group is extremely small compared to the average amount of eccentricity of the entire pre-group, the effect of the above-mentioned deviation is virtually negligible. It is negligible.
上述の如くポジショナ−１が第１番目のプリグループに
位置決めされて情報の書込みまたは読出しが終了すると
、ポジショナ−は次のプリグループに位置決めされて上
記の動作を繰返し、所定のすべてのプリグループに対す
る上記の動作が完了すると、媒体１６は光デイスク装置
から取出されて次の媒体が装着されて上述の動作を繰返
す。このとき、記憶回路６は新しい媒体に関する偏心量
の情報を入力し、前の媒体の情報を消去して新しい情報
を記憶する。As described above, when the positioner 1 is positioned at the first pre-group and the writing or reading of information is completed, the positioner is positioned at the next pre-group and repeats the above operation to write data for all pre-defined pre-groups. When the above operations are completed, the medium 16 is removed from the optical disk device, the next medium is loaded, and the above operations are repeated. At this time, the storage circuit 6 receives eccentricity information regarding the new medium, erases information on the previous medium, and stores new information.
以上詳細に説明したように、本発明の光デイスク装置を
用いることにより、偏心量をあらかじめ計測して記憶し
ておき、とれをボジシ胃す−の回転に対応して送出して
その位置の補正を行うことができるので簡単な構成で安
定性の高い光ヘッドの位置決め制御手段を備える光デイ
スク装置が得８−
’）４し／１）（ＬＶ為）ＶＪ 木ＩＸ／為Ｑ５ 。As explained in detail above, by using the optical disk device of the present invention, the amount of eccentricity is measured and stored in advance, and the deviation is sent out in accordance with the rotation of the body to correct its position. Therefore, an optical disk device having a simple configuration and highly stable optical head positioning control means can be obtained.
図面は本発明の一実施例を示すブロック図である。
図において、
１・・・・・・位置決め装置（ポジショナ−）、２・・
・・・・光学ヘッド、３・・・・・・対物レンズ、４・
・・・・・偏心量検出セ／す、５・・・・・・検出回路
、６・・・・・・記憶回路、８・・・・・・制御回路、
９・・・・・・増幅回路、１１・・・相位置検出センサ
、１２・・・・・・検出回路、１６・・印・光ディスク
（媒体）、１７・・・・・・基準溝（プリグループ）。
＝９−The drawing is a block diagram showing one embodiment of the present invention. In the figure, 1... positioning device (positioner), 2...
...Optical head, 3...Objective lens, 4.
... Eccentricity detection unit, 5 ... Detection circuit, 6 ... Memory circuit, 8 ... Control circuit,
9...Amplification circuit, 11...Phase position detection sensor, 12...Detection circuit, 16...Mark/optical disk (medium), 17...Reference groove (previously group). =9-
Claims (1)
光ディスクの前記基準溝に対する焦点調整装置と位置調
整装置とを有する光学ヘッドと、前記光学ヘッドを前記
基準溝に対して位置決めを行う位置決め装置とを備える
光デイスク装置において、 前記基準溝の中心と前記光ディスクが前記光デイスク装
置に装着されたときの前記光ディスクの回転中心との偏
心量を検出する検出手段と、前記偏心量を記憶する記憶
手段とを備えることを特徴とする光デイスク装置。[Scope of Claims] An optical head having a focus adjustment device and a position adjustment device with respect to the reference groove of an optical disk having a plurality of concentric reference grooves provided in advance, and positioning the optical head with respect to the reference groove. an optical disk device comprising: a detection means for detecting the eccentricity between the center of the reference groove and the center of rotation of the optical disk when the optical disk is mounted on the optical disk device; 1. An optical disk device comprising: storage means for storing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13672582A JPS5928249A (en) | 1982-08-05 | 1982-08-05 | Optical disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13672582A JPS5928249A (en) | 1982-08-05 | 1982-08-05 | Optical disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5928249A true JPS5928249A (en) | 1984-02-14 |
Family
ID=15182032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13672582A Pending JPS5928249A (en) | 1982-08-05 | 1982-08-05 | Optical disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5928249A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0542558A2 (en) * | 1991-11-14 | 1993-05-19 | Canon Kabushiki Kaisha | Optical information recording/reproducing apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50150137A (en) * | 1974-05-27 | 1975-12-02 | ||
| JPS55150137A (en) * | 1979-05-09 | 1980-11-21 | Matsushita Electric Ind Co Ltd | Recorder |
-
1982
- 1982-08-05 JP JP13672582A patent/JPS5928249A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50150137A (en) * | 1974-05-27 | 1975-12-02 | ||
| JPS55150137A (en) * | 1979-05-09 | 1980-11-21 | Matsushita Electric Ind Co Ltd | Recorder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0542558A2 (en) * | 1991-11-14 | 1993-05-19 | Canon Kabushiki Kaisha | Optical information recording/reproducing apparatus |
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