JPS62154239A - Optical type information recording and reproducing device - Google Patents
Optical type information recording and reproducing deviceInfo
- Publication number
- JPS62154239A JPS62154239A JP29230985A JP29230985A JPS62154239A JP S62154239 A JPS62154239 A JP S62154239A JP 29230985 A JP29230985 A JP 29230985A JP 29230985 A JP29230985 A JP 29230985A JP S62154239 A JPS62154239 A JP S62154239A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- disk
- optical head
- optical axis
- 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
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、光学ヘッドの光軸と光学的記録媒体とを直交
関係に維持するスキュー機構(光@頂斜f!A構)を有
する光学式情報記録再生装置に関するものでおる。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to an optical system having a skew mechanism (light @ top tilt f!A structure) that maintains the optical axis of an optical head and an optical recording medium in an orthogonal relationship. This article relates to an information recording and reproducing device.
(従来の技術)
この種の情報記録褥生装吐、例えばディスク状記録媒体
を使用する装置1lillCおいて、光学ヘッドの光軸
とディスク状記録媒体(以後、ディスクを称す。)との
直交関係にずれが生じると、隣接するトラックからの情
報が漏洩して、いわゆるクロストーク現象が生じる。こ
のように、光学ヘッドの光軸とディスクとの直交関係が
ずれる原因としては、例えばディスクが経時変化によっ
て傘形に変形したシ、或いは装置のデツキ部の形状変化
によってディスク回転棚が傾斜する等が挙けられる。(Prior Art) In this type of information recording device and ejection, for example, in an apparatus 1lillC using a disk-shaped recording medium, the orthogonal relationship between the optical axis of the optical head and the disk-shaped recording medium (hereinafter referred to as disk) When a shift occurs, information from adjacent tracks leaks, resulting in a so-called crosstalk phenomenon. As described above, the orthogonal relationship between the optical axis of the optical head and the disk may deviate due to, for example, the disk deforming into an umbrella shape due to aging, or the disk rotating shelf tilting due to a change in the shape of the deck part of the device. can be mentioned.
また、クロストークが生じた場合、ディスク傾きと再生
信号減少の関係は第3図に示すように、例えば外径30
crnのディスクは経時変化と白亜によって0.2°程
度傘形に傾斜する。これKよって書生信号がN A =
0.5においては0.5 dB程度減少する。In addition, when crosstalk occurs, the relationship between the disk tilt and the reduction in the reproduced signal is as shown in Figure 3.
The crn disk tilts in an umbrella shape by about 0.2° due to aging and chalk. Due to this K, the student signal is N A =
At 0.5, it decreases by about 0.5 dB.
そこで第4図に示すように、クロストークを′it気的
に検出して、光学ヘッドの光軸とディスクとの直交関係
を常に正確に維持してクロストークを防止するディスク
の傾き検出機碑が提案された。Therefore, as shown in Figure 4, there is a disk tilt detector that automatically detects crosstalk and always maintains an accurate orthogonal relationship between the optical axis of the optical head and the disk to prevent crosstalk. was proposed.
即ち、第4図において、光軸1を・Hする記録情報読取
用光ビームを記録ディスクの記録面2上に収束せしめる
対物レンズ3が設けられている。一方、光軸1と記録面
2との直交関係のずれを検出すべく検出用補助ビーム用
光源4が設けられており、この補助ビームを対物レンズ
3を介して記録面2へ照射し、この反射光を再び対物レ
ンズ3を介して一対の受光素子5,6へ入射するように
構成されている。ここで、記録面2が光軸1と垂直であ
れば、補助ビームは光軸に幻し対称の方向に反射され実
線で示すように光源4と光軸1に対称の位置へ戻される
。これに対し、記録面が一点鎖線や破線の如く傾斜して
いると、補助ビームは夫夫一点鎖線や破線の如く反射さ
ルる。That is, in FIG. 4, an objective lens 3 is provided for converging a recorded information reading light beam whose optical axis 1 is .H on the recording surface 2 of the recording disk. On the other hand, a detection auxiliary beam light source 4 is provided to detect a deviation in the orthogonal relationship between the optical axis 1 and the recording surface 2, and this auxiliary beam is irradiated onto the recording surface 2 through the objective lens 3. The reflected light is configured to enter the pair of light receiving elements 5 and 6 via the objective lens 3 again. Here, if the recording surface 2 is perpendicular to the optical axis 1, the auxiliary beam is reflected in a direction symmetrical to the optical axis and returned to a position symmetrical to the light source 4 and the optical axis 1, as shown by a solid line. On the other hand, if the recording surface is inclined as shown by the dashed line or broken line, the auxiliary beam is reflected as shown by the broken line or broken line.
そこで、これら反射ビームに付し図示のように受光素子
5.6が設けられ、こ九ら受光出力が差動アンプ7に供
給されて検出用わが導出される。Therefore, light receiving elements 5 and 6 are provided for these reflected beams as shown in the figure, and the light receiving outputs thereof are supplied to a differential amplifier 7 and output for detection.
この検出出力が減算器8においで基準信号9と減算され
、この減算出力をもってスキュー磯si。This detection output is subtracted from the reference signal 9 in the subtracter 8, and the skewed rock si is calculated using this subtraction output.
を駆動するようにして光軸と記録面との直交関係が離性
されるのでおる。By driving the optical axis, the orthogonal relationship between the optical axis and the recording surface is separated.
そして、従来のスキュー機構10としては、第5図に示
した機構が用いられていた。As the conventional skew mechanism 10, the mechanism shown in FIG. 5 has been used.
即ち、モータ11が回動すると、該モータ11に連結し
たギヤ12はギヤ13,14,15゜16を介してピン
17を取付けただャ18を回動させる。そして、前記ピ
ン17の回動によって光学ヘッド19を押上げる機構(
不図示)が配設されている。また、光学ヘッド19は、
レール20゜21上をローラ22、軸受孔23を介して
& −8’方向に移動自在であシ、更Km棒24を中心
にしてb −b’方向に回動自在である。従って、@受
部材25に取付けたバネ(不図示〕で光字ヘッド19を
常に押下けるようにすれば、ピン17の回動によって光
学ヘッド19は、回転軸24′(I−中心にしてb −
b’方向に回動し、光学ヘッド19の光軸を傾斜させる
ことができる。That is, when the motor 11 rotates, the gear 12 connected to the motor 11 rotates the gear 18 to which the pin 17 is attached via the gears 13, 14, and 15 degrees 16. Then, a mechanism (
(not shown) is provided. Further, the optical head 19 is
It is movable on the rails 20° 21 in the &-8' directions via the rollers 22 and the bearing holes 23, and is further rotatable in the b-b' directions about the Km rod 24. Therefore, if the optical head 19 is always pressed down by a spring (not shown) attached to the receiving member 25, the rotation of the pin 17 will cause the optical head 19 to −
By rotating in the b' direction, the optical axis of the optical head 19 can be tilted.
(発明が解決しようとする問題点)
しかしながら、前述したスキュー機構は光字ヘッド19
自体に配設される為に1元字ヘッド19自体のxlkが
重くなシ、光学ヘッド19のa −a’力方向アクセス
時間が遅くなるという問題点がめフた。(Problem to be Solved by the Invention) However, the above-mentioned skew mechanism
This solves the problem that the xlk of the one-gen head 19 itself is heavy because it is disposed on the optical head 19 itself, and the access time of the optical head 19 in the a-a' force direction becomes slow.
本発明は、上記従来例の問題改を解決する目的でなされ
、光学ヘッドのアクセス時間が速く、且つスキュー機構
も簡単な構成で良好に行うことができる光学式11r報
記録書生装置を提供しようとするものである。The present invention was made for the purpose of solving the above-mentioned problems of the conventional example, and it is an object of the present invention to provide an optical 11r information recording/writing device in which the access time of the optical head is fast and the skew mechanism can be satisfactorily performed with a simple configuration. It is something to do.
(問題点を解決するための手段)
前記問題点を解決するための手段として、本発明は、光
学ヘッドに対して記録媒体を回転させて情報の記録又は
再生を行う光学人情4&記録再生装置において、前記記
録媒体の回転軸を、該記録媒体のたわみ角に対応させて
鉛直方向上シ一定角度傾けることを要旨とするものでわ
る。(Means for Solving the Problems) As a means for solving the above problems, the present invention provides an optical recording and reproducing apparatus that records or reproduces information by rotating a recording medium relative to an optical head. , the gist is that the rotation axis of the recording medium is tilted at a certain angle in the vertical direction in correspondence with the deflection angle of the recording medium.
(実施1flJ )
以下、本発明を図示の一実施列によって詳細に説明する
。(Embodiment 1flJ) The present invention will be described in detail below with reference to one embodiment shown in the drawings.
第1図は本発明に係る光学式情報記録再生装置の要部を
示す斜視図である。この図において、30はディスク状
記録媒体31の載置台であるターンテーブルであシ、該
ターン六−プル30はスピンドルモータ等の駆動モータ
32の回転軸33に装着されている。34はディスク状
記録媒体31に対して情報の記録又は再生を行う光学ヘ
ッドでろシ、35は対物レンズである。36は水平に配
設したガイドレールであり、該ガイドレール36に沿っ
て光学ヘッド34が移動自在でるる。FIG. 1 is a perspective view showing the main parts of an optical information recording/reproducing apparatus according to the present invention. In this figure, numeral 30 is a turntable serving as a mounting base for a disk-shaped recording medium 31, and the turntable 30 is attached to a rotating shaft 33 of a drive motor 32 such as a spindle motor. 34 is an optical head for recording or reproducing information on the disk-shaped recording medium 31, and 35 is an objective lens. Reference numeral 36 denotes a horizontally arranged guide rail, along which the optical head 34 can freely move.
この際、前記ディスク状記録媒体31の外周面近傍は、
経時変化と自重によって0.2°程度のたわみ角Aを有
する傘形に変形している。そして、前記の状態において
、駆動モータ32の回転軸33は、鉛直方向、即ち光学
ヘッド34の光軸B方向に対してディスク状記録媒体3
1のたわみ用A(0,2°〕のほぼ半分の0.1°程度
に傾けて配設されている。At this time, near the outer peripheral surface of the disk-shaped recording medium 31,
Due to aging and its own weight, it deforms into an umbrella shape with a deflection angle A of about 0.2°. In the above state, the rotation shaft 33 of the drive motor 32 rotates toward the disk-shaped recording medium 3 in the vertical direction, that is, in the direction of the optical axis B of the optical head 34.
It is arranged at an angle of about 0.1°, which is approximately half of the deflection A (0.2°) of 1.
従って、回転1ItH33に装置したターンテーブル3
0上のディスク状記録媒体31と光学ヘッド34の光1
11]B方向の頑きC8も0.1°佳度になる。Therefore, the turntable 3 installed at rotation 1ItH33
Light 1 from the optical head 34 and the disk-shaped recording medium 31 on the
11] The stiffness C8 in the B direction also has a 0.1 degree goodness.
また外周近傍の傘形に変形した重分も、光字ヘッド34
の光@B方向との傾きを0.1°程度にA蛍することが
でき、光学ヘッド34の元軸Bとディスク状記録媒体3
1との直父関沫を、はとんど丹生信号の低下が生じない
状態に維持することができる。In addition, the overlap that has been deformed into an umbrella shape near the outer periphery is also removed by the optical head 34.
The inclination of the light with respect to the B direction can be set to about 0.1°, and the original axis B of the optical head 34 and the disk-shaped recording medium 3
1 can be maintained in a state where the Nyu signal does not deteriorate at all.
更に、第2図に示すように、経時変化によって外周面近
傍が0.1°程度のたわみ角を有する傘形に変形したデ
ィスク状記録媒体37を、変形部分が上を向くようにし
てターンテーブル30に配置した場合、前記ディスク状
記録媒体37の先端部は250μm程度下方にたわむ。Furthermore, as shown in FIG. 2, the disk-shaped recording medium 37, which has been deformed into an umbrella shape with a bending angle of about 0.1° near the outer peripheral surface due to aging, is placed on a turntable with the deformed portion facing upward. 30, the leading end of the disk-shaped recording medium 37 is bent downward by about 250 μm.
つまり、このたわみは角度にすると0.1°程度となり
、変形のないほぼ平坦なディスク状記録媒体37となる
。また、駆動モータ32の回転@33は光学ヘッド34
の光軸B方向に対して、前述したように0.1°程度傾
けて配設されている。従って、回転軸33に装置したタ
ーンテーブル30上のディスク状記録媒体37と光学ヘ
ッド34の元411B方向の傾きC3も0.1部8度に
真整することができ、光字ヘッド34の元軸Bと−f4
スク状記録縛体37との直交関係を、はとんど再生信号
の低下が生じない状態に維持することができる。In other words, this deflection is approximately 0.1° in angle, resulting in a substantially flat disk-shaped recording medium 37 without deformation. Further, the rotation @33 of the drive motor 32 is caused by the rotation of the optical head 34.
As described above, it is arranged at an angle of about 0.1° with respect to the direction of the optical axis B. Therefore, the inclination C3 of the disk-shaped recording medium 37 on the turntable 30 mounted on the rotation shaft 33 and the optical head 34 in the direction 411B can be adjusted to 0.1 part 8 degrees, and the optical head 34 can be adjusted to 8 degrees. Axis B and -f4
The orthogonal relationship with the disk-shaped recording binding body 37 can be maintained in a state where the playback signal does not deteriorate as much as possible.
(発明の効果)
以上の説明したように、本発明に保る光字式情報記録再
生装置は、記録媒体の回転軸を、記録媒体のたわみ角に
対応させて鉛直方向より一定角度傾ける構成により、光
学ヘッドの光軸と記録媒体とを、はとんど再生信号の低
下が生じない直交関係に維持することができ、光学ヘッ
ドからスキュー機構を除去することができる。(Effects of the Invention) As explained above, the optical information recording and reproducing apparatus according to the present invention has a configuration in which the rotation axis of the recording medium is tilted at a certain angle from the vertical direction in accordance with the deflection angle of the recording medium. The optical axis of the optical head and the recording medium can be maintained in an orthogonal relationship that hardly causes a drop in the reproduced signal, and the skew mechanism can be eliminated from the optical head.
従って、光学ヘッドの大幅な@値化が可′FI’Eとな
るので、アクセス時間を速くすることがでさ、更にスキ
ュー機構もより聞革な構成にすることができる等の浸れ
た幼果を奏する。Therefore, it is possible to significantly increase the @ value of the optical head, making it possible to speed up the access time, and furthermore, the skew mechanism can be configured more conveniently. play.
第1図は本発明に係る光学式情“報記録丹生装置の費部
を示す概略断面図、第2図は同装置の他の実施例を示す
航路断面図、第3図はディスク1頃さと再生信号減少比
との関係を示す図、第4凶はディスクの傾き検出機構を
示す概略図、第5図は従来装詮におけるスキュー愼粥の
S2部を示す斜視図である。
30・・・ターンテーブル、31.37・・・rイスク
状記録媒体、32・・・駆動モータ、33・・・回転軸
、34・・・光学ヘッド、A・・・たわみ角、B・・・
光軸、C□ 、C2・・・傾き。
代理人 弁理士 山 下 檄 半
筒1図
い
第2図
第3図
゛[
第5図FIG. 1 is a schematic cross-sectional view showing the cost part of the optical information recording device according to the present invention, FIG. 2 is a cross-sectional view showing another embodiment of the same device, and FIG. The fourth figure is a schematic diagram showing the disk tilt detection mechanism, and the fifth figure is a perspective view showing the S2 portion of the skewed rice porridge in the conventional arrangement. 30... Turntable, 31.37...r disk-shaped recording medium, 32... Drive motor, 33... Rotating shaft, 34... Optical head, A... Deflection angle, B...
Optical axis, C□, C2...tilt. Agent Patent Attorney Akira Yamashita Half cylinder 1, 2, 3 and 5
Claims (2)
記録又は再生を行う光学式情報記録再生装置において、
前記記録媒体の回転軸を、該記録媒体のたわみ角に対応
させて鉛直方向より一定角度傾けることを特徴とする光
学式情報記録再生装置。(1) In an optical information recording/reproducing device that records or reproduces information by rotating a recording medium relative to an optical head,
An optical information recording/reproducing device characterized in that the rotation axis of the recording medium is tilted at a certain angle from the vertical direction in correspondence with the deflection angle of the recording medium.
半分の角度であ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。(2) Claim 1, wherein the certain angle is approximately half the angle for deflection of the recording medium.
The optical information recording and reproducing device described in .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29230985A JPS62154239A (en) | 1985-12-26 | 1985-12-26 | Optical type information recording and reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29230985A JPS62154239A (en) | 1985-12-26 | 1985-12-26 | Optical type information recording and reproducing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS62154239A true JPS62154239A (en) | 1987-07-09 |
Family
ID=17780096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP29230985A Pending JPS62154239A (en) | 1985-12-26 | 1985-12-26 | Optical type information recording and reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62154239A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010102777A (en) * | 2008-10-23 | 2010-05-06 | Teac Corp | Optical disk device |
-
1985
- 1985-12-26 JP JP29230985A patent/JPS62154239A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010102777A (en) * | 2008-10-23 | 2010-05-06 | Teac Corp | Optical disk device |
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