JPH01235032A - Optical recording/reproducing device and its recording carrier - Google Patents
Optical recording/reproducing device and its recording carrierInfo
- Publication number
- JPH01235032A JPH01235032A JP63061074A JP6107488A JPH01235032A JP H01235032 A JPH01235032 A JP H01235032A JP 63061074 A JP63061074 A JP 63061074A JP 6107488 A JP6107488 A JP 6107488A JP H01235032 A JPH01235032 A JP H01235032A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- record carrier
- optical
- record
- reproducing
- 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
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 31
- 230000001427 coherent effect Effects 0.000 claims abstract description 11
- 239000000969 carrier Substances 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 19
- 230000004075 alteration Effects 0.000 claims description 5
- 239000011241 protective layer Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は光記録再生装置に関するものであり、特に低密
度記録担体と高密度記録担体とを同一機器で使用できる
光記録再生装置とその記録担体に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an optical recording/reproducing device, and more particularly to an optical recording/reproducing device that can use a low-density record carrier and a high-density record carrier in the same device, and its record carrier. It is something.
従来の技術
近年、光記録再生装置の進歩は著しくコンパクトディス
ク、レーザディスク、データファイルといった商品名で
市販されている。2. Description of the Related Art In recent years, optical recording and reproducing devices have made remarkable progress and are now commercially available under trade names such as compact discs, laser discs, and data files.
以下、図面を参照しながら、上述した従来の光記録再生
装置の一例について説明する。An example of the above-mentioned conventional optical recording/reproducing device will be described below with reference to the drawings.
第３図は従来の光記録再生装置の一例を示すものである
。第３図において１０１は記録担体であり記録層１０２
、保護層１０３から成っている。また、１０４は記録担
体１０１を駆動するモータ、１０５は信号を再生するピ
ックアップである。１０７はピックアップ１０５の制御
誤差出力信号を受はピックアップ１０５を制御するピッ
クアップ制御部であり１０８は同様にモータ１０４を制
御するモータ制御部であり、１０６はピックアップの出
力信号から情報信号を再生する信号再生部である。以上
のように構成された記録再生装置において、記録担体１
０１から再生された制御誤差信号によりピックアップ制
御部１０７でフォーカス制御、トラッキング制御、トラ
バース制御等のピックアップ制御を行いピックアップ１
０５を駆動する。また、記録担体１０１から再生された
信号から同期信号を再生しそれらが一定になるようモー
タ１０４を駆動する。（例えば、「無線と実験別冊：Ｐ
ＣＭ／ディジタルオーディオのすべて ｐ、６４．４
）
発明が解決しようとする課題
しかしながら上記のような構成では記録密度、特に記録
トラック幅の異なる記録担体を用いるとトラック幅に対
し記録層上への収束スポットが小さ過ぎる場合あまいは
大き過ぎる場合正確にトラック制御が出来ないという課
題を有していた。FIG. 3 shows an example of a conventional optical recording/reproducing device. In FIG. 3, 101 is a record carrier and a recording layer 102.
, a protective layer 103. Further, 104 is a motor that drives the record carrier 101, and 105 is a pickup that reproduces signals. 107 is a pickup control unit that receives a control error output signal of the pickup 105 and controls the pickup 105; 108 is a motor control unit that similarly controls the motor 104; and 106 is a signal that reproduces an information signal from the output signal of the pickup. This is the reproduction department. In the recording/reproducing apparatus configured as described above, the record carrier 1
The pickup control unit 107 performs pickup controls such as focus control, tracking control, and traverse control based on the control error signal reproduced from pickup 1.
Drive 05. Further, the synchronization signal is reproduced from the signal reproduced from the record carrier 101, and the motor 104 is driven so that the synchronization signal becomes constant. (For example, “Wireless and Experimental Special Issue: P
All about CM/Digital Audio p, 64.4
) Problems to be Solved by the Invention However, with the above configuration, when recording carriers with different recording densities, especially recording track widths, are used, if the convergence spot on the recording layer is too small for the track width, it will be inaccurate, and if it is too large, it will not be accurate. The problem was that track control was not possible.
本発明は上記問題点に鑑み、異なった記録密度で記録さ
れた異なる複数種類の記録担体を用いることが出来る光
記録再生装置を提供するものである。In view of the above-mentioned problems, the present invention provides an optical recording and reproducing apparatus that can use a plurality of different types of record carriers recorded at different recording densities.
課題を解決するための手段
上記課題を解決するために本発明の光記録再生装置は、
コヒーレント光源と、前記コヒーレント光源から出た光
を収束する光収束手段と、前記光収束手段により光を収
束される記録層と、使用波長により大略決まる最大記録
密度で前記記録層に記録する記録担体および前記最大記
録密度以下で前記記録層に記録するその他の記録担体と
、前記記録担体への記録および前記記録担体からの再生
を制御する記録再生制御手段とを具備するという特徴を
備えたものである。Means for Solving the Problems In order to solve the above problems, the optical recording and reproducing apparatus of the present invention includes:
A coherent light source, a light converging means for converging light emitted from the coherent light source, a recording layer on which the light is converged by the light converging means, and a record carrier for recording on the recording layer at a maximum recording density approximately determined by the wavelength used. and another record carrier for recording on the recording layer at the maximum recording density or less, and a recording/reproduction control means for controlling recording on the record carrier and reproduction from the record carrier. be.
前記コヒーレント光源には半導体レーザやガスレーザ等
のレーザ光源が用いられる。前記光収束手段は前記コヒ
ーレント光源から出た光を記録担体上に収束するレンズ
系を含む光学系より成り立っている。この光源、収束光
学系、および記録担体からの反射光・透過光を受は信号
を電気信号に変換する受光素子（図示せず）より成る部
分を一般にピックアップと呼ぶ。記録層には幾何学的凹
凸、明暗、屈折率変化等種々の形で記録ピットを記録す
るものがある。使用波長により大略決まる記録密度はほ
ぼ経験的に次式で表される。厳密にはエラー率等の機器
の仕様により決める。A laser light source such as a semiconductor laser or a gas laser is used as the coherent light source. The light converging means comprises an optical system including a lens system that converges the light emitted from the coherent light source onto the record carrier. A portion consisting of a light source, a converging optical system, and a light receiving element (not shown) that receives reflected light and transmitted light from the record carrier and converts the signals into electrical signals is generally called a pickup. Some recording layers have recording pits recorded in various shapes such as geometric unevenness, brightness and darkness, and changes in refractive index. The recording density, which is roughly determined by the wavelength used, is almost empirically expressed by the following equation. Strictly speaking, it is determined by the specifications of the equipment, such as the error rate.
λ
但しＮＡは光収束手段の対物レンズの開口数、λは使用
波長である。λ where NA is the numerical aperture of the objective lens of the light converging means, and λ is the wavelength used.
記録担体への記録および記録担体からの再生を制御する
記録再生制御手段は通常のフォーカス制御、トラッキン
グ制御、モータ制御等の制御に加えて、記録担体の記録
層上での光スポ−／ トの大きさを使用記録担体に応じ
て変えるために１）光収束手段内に光学的収差を調節す
るための光学素子を設けその使用／不使用を制御する。The recording/reproducing control means that controls recording to and reproduction from the record carrier not only performs normal focus control, tracking control, motor control, etc., but also controls optical spots/spots on the recording layer of the record carrier. In order to change the size depending on the record carrier used, 1) An optical element for adjusting optical aberration is provided in the light converging means, and its use/non-use is controlled.
２）光学的収差を起こさせるためフォーカス制御信号に
直流バイアスを与える。2) Apply a DC bias to the focus control signal to cause optical aberration.
等の制御手段を使用する。Use other control means.
作用
本発明は上記した構成によって、使用する記録担体に応
じて記録層上に収束する光スポットの大きさを変えるこ
とが出来、異なった記録密度で記録された記録担体を同
一光記録再生装置で用いることが出来る。Effect of the Invention With the above-described configuration, the present invention can change the size of the light spot converged on the recording layer depending on the record carrier used, and record carriers recorded with different recording densities can be recorded with the same optical recording/reproducing device. It can be used.
実施例
以下本発明の一実施例の光記録再生装置について、図面
を参照しながら説明する。第１図は本発明の一実施例を
示す図である。第１図において１は記録担体であり記録
層２と透明な保護層３から構成される。記録担体１はモ
ータ４で駆動される記録担体１の記録層２に記録された
情報はピックアップ５で電気信号に変えられる。ピック
アップ５の出力誤差信号に基づきフォーカス制御部１）
、およびトラッキング制御部１２でピックアップの制御
処理を行いこの出力信号でピンクアップ５のフォーカス
、トラッキング制御を行う。同様にピックアップ５の出
力信号を受はモータ制御部８で同期信号を抽出し基準ク
ロック（図示せず）と−敗するようモータ制御する。記
録担体１から再生された情報信号は信号再生部６で再生
復調される。Embodiment Hereinafter, an optical recording/reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a record carrier, which is composed of a recording layer 2 and a transparent protective layer 3. The record carrier 1 is driven by a motor 4. Information recorded on the recording layer 2 of the record carrier 1 is converted into an electrical signal by a pickup 5. Focus control unit 1) based on the output error signal of the pickup 5
, and a tracking control section 12 perform pickup control processing, and use this output signal to perform focus and tracking control of the pink-up 5. Similarly, upon receiving the output signal of the pickup 5, a motor control section 8 extracts a synchronizing signal and controls the motor so as to be synchronized with a reference clock (not shown). The information signal reproduced from the record carrier 1 is reproduced and demodulated by the signal reproducing section 6.
この復調信号を受は記録担体判定部１０で記録担体の種
類を判定し記録密度が低い記録担体の場合、この出力信
号でもってフォーカス制御部１）を制御しフォーカス制
御信号に直流バイアス信号を重畳させる。フォーカス制
御部１）およびトラッキング制御部１２でもってピック
アップ制御部７を構成する。Receiving this demodulated signal, the record carrier determination unit 10 determines the type of record carrier. If the record carrier has a low recording density, this output signal controls the focus control unit 1) and superimposes a DC bias signal on the focus control signal. let The focus control section 1) and the tracking control section 12 constitute a pickup control section 7.
第１図の構成において、高い記録密度の記録担体の場合
フォーカス制御を正確に合わせ、記録密度が低い記録担
体の場合フォーカス制御を少しずらし記録層２上での光
スポットの大きさを記録密度に適した大きさに制御する
ことにより種類の異なる記録担体を同一の記録再生機器
で使用することができる。In the configuration shown in Figure 1, the focus control is adjusted accurately for a record carrier with a high recording density, and the focus control is slightly shifted for a record carrier with a low recording density to adjust the size of the light spot on the recording layer 2 to the recording density. By controlling the size to be suitable, different types of record carriers can be used in the same recording/reproducing device.
第２図は本発明の第２の実施例であり、第１図と同一の
部分は同一の番号で示した。２０．２０’ （２０’は
図示せず）は記録担体であり、記録担体２０は保護Ｎ２
３の厚みがｌ ＋ｎであり記録担体２０゛ は保護層２
３゛（図示せず）の厚みが１．５鶴である。記録層２２
は記録担体２０．２０゛ とも同一である。記録担体
２゜の記録トラックピッチは０．９μｍ、記録担体２０
’のトラックピッチは１．６μｍである。ピックアップ
２５の光学系の内部の非平行光の部分に厚さ３頭のガラ
ス板を入れてあり、記録担体２０’使用時はこの板を光
学系の光路から取り去る機構となっている（図示せず）
。記録担体判定部１ｏで記録担体の種類を判定しその出
力信号をフォーカス制御部２１を制御し前記厚さ３ｎの
ガラス板を出し入れする。FIG. 2 shows a second embodiment of the present invention, and the same parts as in FIG. 1 are designated by the same numbers. 20. 20'(20' not shown) is a record carrier, the record carrier 20 is protected N2
3 has a thickness of l + n, and the recording carrier 20゛ is the protective layer 2.
The thickness of 3゛ (not shown) is 1.5 Tsuru. Recording layer 22
is also the same as the record carrier 20.20゛. Recording track pitch of record carrier 2° is 0.9 μm, record carrier 20
The track pitch of ' is 1.6 μm. A glass plate with a thickness of three heads is inserted into the non-parallel light section inside the optical system of the pickup 25, and the mechanism is such that this plate is removed from the optical path of the optical system when the record carrier 20' is used (not shown). figure)
. A record carrier determining section 1o determines the type of record carrier, and its output signal controls a focus control section 21 to insert and remove the glass plate having a thickness of 3n.
上記構成において、厚さ３ｆｌのガラス板により記録担
体２０′使用時、記録層２２への収束スポットの収差を
大きくし低記録密度の記録担体に対応している。In the above configuration, the glass plate having a thickness of 3 fl increases the aberration of the convergence spot on the recording layer 22 when the recording carrier 20' is used, and is compatible with a recording carrier of low recording density.
なお、記録担体２０（２０’）の保護層は上述のように
厚みを変えてもよいし屈折率のような光学的性質を変え
てもよい。記録担体の種類判定は人が行ってもよい。そ
の他色々と考えられる。また、本発明は記録／再生装置
、再生のみの装置、記録のみの装置のいずれにも用いる
ことができる。Note that the thickness of the protective layer of the recording carrier 20 (20') may be changed as described above, and the optical properties such as the refractive index may be changed. The type of record carrier may be determined manually. Many other things can be considered. Further, the present invention can be used in any of a recording/reproducing device, a reproducing only device, and a recording only device.
発明の効果
以上のように本発明はコヒーレント光源と、前記コヒー
レント光源から出た光を収束する光収束手段と、前記光
収束手段により光を収束される記録層と、使用波長によ
り大略決まる最大記録密度で前記記録層に記録する記録
担体および前記最大記録密度以下で前記記録層に記録す
るその他の記録担体と前記記録担体への記録および前記
記録担体からの再生を制御する記録再生制御手段とを設
けることにより、記録密度の異なる記録担体を同一の記
録再生装置で使用可能とすることが出来る。Effects of the Invention As described above, the present invention includes a coherent light source, a light converging means for converging light emitted from the coherent light source, a recording layer on which the light is converged by the light converging means, and a maximum recording speed approximately determined by the wavelength used. A record carrier for recording on the recording layer at a density, another record carrier for recording on the recording layer at a density below the maximum recording density, and a recording/reproduction control means for controlling recording on the record carrier and reproduction from the record carrier. By providing this, record carriers with different recording densities can be used in the same recording/reproducing device.
第１図は本発明の一実施例を示す概略図、第２図は本発
明の他の一実施例を示す概略図、第３図は従来の記録再
生装置の一例を示す概略図である。
■・・・・・・記録担体、４・・・・・・モータ、５・
・・・・・ピックアップ、６・・・・・・信号再生部、
７・・・・・・ビックアンプ制御部、８・・・・・・モ
ータ制御部。
代理人の氏名 弁理士 中尾敏男 はか１名第１図
第２図
第３図FIG. 1 is a schematic diagram showing one embodiment of the present invention, FIG. 2 is a schematic diagram showing another embodiment of the invention, and FIG. 3 is a schematic diagram showing an example of a conventional recording/reproducing apparatus. ■...Record carrier, 4...Motor, 5.
...Pickup, 6...Signal reproducing section,
7... Big amplifier control section, 8... Motor control section. Name of agent: Patent attorney Toshio Nakao (1 person) Figure 1 Figure 2 Figure 3
Claims (4)
出た光を収束する光収束手段と、前記光収束手段により
光を収束される記録層と、使用波長により大略決まる最
大記録密度で前記記録層に記録する記録担体および前記
最大記録密度以下で前記記録層に記録するその他の記録
担体と、前記複数種類の記録担体への記録および前記記
録担体からの再生を制御する記録再生制御手段とを具備
することを特徴とする光記録再生装置。(1) A coherent light source, a light converging means for converging the light emitted from the coherent light source, a recording layer on which the light is converged by the light converging means, and recording on the recording layer at a maximum recording density roughly determined by the wavelength used. and another record carrier that records on the recording layer at a recording density below the maximum recording density, and a recording/playback control means for controlling recording on the plurality of types of record carriers and playback from the record carrier. An optical recording/reproducing device characterized by:
のフォーカス制御の出力に所定の直流バイアスを重畳さ
せるようにしたことを特徴とする請求項第（１）項記載
の光記録再生装置。(2) The optical recording and reproducing apparatus according to claim 1, wherein a predetermined DC bias is superimposed on the output of the focus control in the recording and reproducing control means depending on the type of the record carrier. .
内に光学的収差を起こさせる光学素子を挿入するように
したことを特徴とする請求項第（１）項記載の光記録再
生装置。(3) Optical recording and reproducing according to claim (1), characterized in that an optical element that causes optical aberration is inserted into the optical path of the light converging means depending on the type of the record carrier. Device.
た光を収束する光収束手段とを具備し前記光収束手段に
より光を収束される記録担体と使用波長により大略決ま
る最大記録密度で前記記録担体に記録再生する光記録再
生装置に対し前記記録担体の保護層の光学的性質を変え
て光学的収差を生ぜしめ前記最大記録密度以下で記録再
生可能とし前記光記録再生装置を共用出来るようにした
ことを特徴とする記録担体。(4) A coherent light source and a light converging means for converging the light emitted from the coherent light source, and recording is performed on the record carrier at a maximum recording density roughly determined by the record carrier on which the light is converged by the light converging means and the wavelength used. By changing the optical properties of the protective layer of the record carrier in the optical recording and reproducing device for reproducing, the optical aberration is produced, so that recording and reproducing is possible at less than the maximum recording density, and the optical recording and reproducing device can be shared. A record carrier characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63061074A JP2643254B2 (en) | 1988-03-15 | 1988-03-15 | Optical disk drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63061074A JP2643254B2 (en) | 1988-03-15 | 1988-03-15 | Optical disk drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01235032A true JPH01235032A (en) | 1989-09-20 |
| JP2643254B2 JP2643254B2 (en) | 1997-08-20 |
Family
ID=13160622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63061074A Expired - Fee Related JP2643254B2 (en) | 1988-03-15 | 1988-03-15 | Optical disk drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2643254B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994022138A1 (en) * | 1993-03-17 | 1994-09-29 | Deutsche Thomson-Brandt Gmbh | Compatible recording and/or playback device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643833A (en) * | 1987-06-24 | 1989-01-09 | Mitsubishi Electric Corp | Optical recording and reproducing device |
| JPH01213838A (en) * | 1988-02-23 | 1989-08-28 | Hitachi Ltd | Optical information recording and reproducing device |
-
1988
- 1988-03-15 JP JP63061074A patent/JP2643254B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643833A (en) * | 1987-06-24 | 1989-01-09 | Mitsubishi Electric Corp | Optical recording and reproducing device |
| JPH01213838A (en) * | 1988-02-23 | 1989-08-28 | Hitachi Ltd | Optical information recording and reproducing device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994022138A1 (en) * | 1993-03-17 | 1994-09-29 | Deutsche Thomson-Brandt Gmbh | Compatible recording and/or playback device |
| EP0689708A1 (en) * | 1993-03-17 | 1996-01-03 | Thomson Brandt Gmbh | Compatible recording and/or playback device |
| CN1059045C (en) * | 1993-03-17 | 2000-11-29 | 德国汤姆逊-布朗特公司 | Compatible recording and/or playback device |
| US6198706B1 (en) * | 1993-03-17 | 2001-03-06 | Deutsche Thomson-Brandt Gmbh | Optical format compatible recording and/or playback device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2643254B2 (en) | 1997-08-20 |
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| LAPS | Cancellation because of no payment of annual fees |