JPH06162506A - Informtion recording method to optical disk - Google Patents
Informtion recording method to optical diskInfo
- Publication number
- JPH06162506A JPH06162506A JP4305262A JP30526292A JPH06162506A JP H06162506 A JPH06162506 A JP H06162506A JP 4305262 A JP4305262 A JP 4305262A JP 30526292 A JP30526292 A JP 30526292A JP H06162506 A JPH06162506 A JP H06162506A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- optical disk
- optical disc
- correction
- signal
- 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)
- Optical Head (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は情報が記録可能な例えば
ライトワンス、光磁気、相変化等の光ディスクに記録信
号を記録する際に、記録信号をより正しく高密度に記録
するための光ディスクへの情報記録方法に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk for recording a recording signal more accurately and at a high density when recording a recording signal on an optical disk capable of recording information such as write-once, magneto-optical and phase change. The present invention relates to a method of recording information.
【０００２】[0002]
【従来の技術】一般に光ディスク、光磁気ディスクや相
変化ディスクのように、ディスク上の温度変化を利用し
て情報を記録する場合には、記録密度を向上させようと
すればする程、記録波形の一部を強調或いは減衰等をさ
せて記録信号を記録する技術が必要となる。図２は従来
の光ディスクへの情報記録方法を実施した場合の各種の
波形図である。かかる従来の光ディスクへの情報記録方
法による記録波形の立上がりの記録補正に関して、図２
を用いて説明する。図２の(a) の記録信号を光ディスク
上に記録しようとする場合には、図２の(c) に示す温度
分布のように記録媒体である光ディスク上の温度をキュ
リー温度Ｔａ以上に急激に上昇させる必要があるため、
図２の(b) に示すように信号立上がり部分を強調した記
録波形のビームを光ピックアップの光源部から光ディス
クに照射して記録すれば、図２の(c) に示すように光デ
ィスク上にティア ドロップ形状が改善された記録信号
のマークが記録される。2. Description of the Related Art Generally, in the case of recording information by utilizing temperature change on a disc such as an optical disc, a magneto-optical disc and a phase change disc, the recording waveform is increased as the recording density is increased. A technique for recording a recording signal by emphasizing or attenuating a part of the above is required. FIG. 2 is various waveform charts when the conventional method of recording information on an optical disc is carried out. FIG. 2 shows the recording correction of the rising edge of the recording waveform by the conventional information recording method on the optical disk.
Will be explained. When the recording signal of FIG. 2 (a) is to be recorded on the optical disc, the temperature on the optical disc, which is the recording medium, is rapidly increased above the Curie temperature Ta as shown in the temperature distribution of FIG. 2 (c). Because it needs to be raised
As shown in FIG. 2 (b), when a beam having a recording waveform in which a signal rising portion is emphasized is irradiated from the light source section of the optical pickup onto the optical disc for recording, a tear wave is recorded on the optical disc as shown in FIG. 2 (c). The mark of the recording signal with the improved drop shape is recorded.
【０００３】[0003]
【発明が解決しようとする課題】従来の光ディスクへの
情報記録方法は光ディスクに信号立上がり部分を強調し
た記録波形のビームを照射して光ディスクに記録信号を
記録するようにしているから、記録補正としては、非常
に有効であるが、ディスクの転送速度を向上させた場合
には、補正する以前でも大きな記録パワーが必要とな
り、記録補正する分の光出力を半導体レザーが発光でき
ないという問題点があった。また、記録パワーの設定値
以外に補正分の光出力を設定できるように半導体レザー
の光出力の駆動回路を工夫しなければならず、記録補正
をしない場合に比較すると、非常に回路的な負担が大き
いという問題点もあった。In the conventional method of recording information on an optical disc, a recording signal is recorded on the optical disc by irradiating the optical disc with a beam having a recording waveform in which the rising edge of the signal is emphasized. Is very effective, but when the transfer speed of the disc is improved, a large recording power is required even before correction, and there is a problem that the semiconductor laser cannot emit the optical output corresponding to the recording correction. It was In addition, the drive circuit for the optical output of the semiconductor laser must be devised so that the optical output for the correction other than the setting value of the recording power can be set, and compared to the case where the recording correction is not performed, the circuit load is very large. There was also a problem that it was large.
【０００４】本発明は、このような問題点を解決するた
めになされたものであり、半導体レーザの光出力に制限
されず、かつ記録補正を用いない半導体レザーの光出力
の駆動回路と同程度の回路規模にて記録補正して、記録
信号を高密度に記録する光ディスクへの情報記録方法を
得ることを目的とする。The present invention has been made in order to solve such a problem, and is not limited to the optical output of a semiconductor laser, and is almost the same as a drive circuit of an optical output of a semiconductor laser that does not use recording correction. It is an object of the present invention to obtain a method of recording information on an optical disc which records and corrects a recording signal with high density by performing recording correction on the circuit scale.
【０００５】[0005]
【課題を解決するための手段】本発明に係る光ディスク
への情報記録方法は、光ディスクに対して二つのビーム
を該光ディスク上で熱的な相互作用を十分与えるような
距離に照射し、前記二つのビームのうち、一方のビーム
を記録信号の先頭部分について前記光ディスクに照射
し、他方のビームを前記記録信号に応じた期間前記光デ
ィスクに照射して光ディスクに記録信号を記録するよう
にしたものである。また、前記一方のビームの強度を記
録信号の長さ間隔に応じて可変とするようにしてもよ
く。さらに、前記一方のビームの照射時間を記録信号の
長さ間隔に応じて可変とするようにしてもよい。According to the method of recording information on an optical disk of the present invention, two beams are irradiated onto the optical disk at a distance such that a sufficient thermal interaction is exerted on the optical disk. Of the two beams, one beam is applied to the optical disc for the beginning portion of the recording signal, and the other beam is applied to the optical disc for a period corresponding to the recording signal to record the recording signal on the optical disc. is there. Further, the intensity of the one beam may be variable according to the length interval of the recording signal. Further, the irradiation time of the one beam may be variable according to the length interval of the recording signal.
【０００６】[0006]
【作用】本発明においては、二つのビームのうち、一方
のビームを記録信号の先頭部分について前記光ディスク
に照射し、他方のビームを前記記録信号に応じた期間前
記光ディスクに照射して光ディスクに記録信号を記録す
るようにしたから、二つのビームのうち、記録信号を記
録するビームについても従来の記録補正をしない半導体
レーザの駆動回路をそのまま適用できることとなり、記
録補正によって半導体レーザの光出力が不足することは
なく、従来の記録補正と同等の結果を得ることができ
る。また、記録信号の先頭部分について照射するビーム
の強度を記録信号の長さ間隔に応じて可変とするように
したから、任意に記録補正量が決められることなり、よ
り決め細かな記録補正が可能となる。記録信号の先頭部
分について照射するビームの照射時間を記録信号の長さ
間隔に応じて可変とするようにしたから、補正部分は記
録波形と独立に制御できることとなり、補正部分の照射
時間を微妙に変えることによっても最適な記録が可能と
なる。According to the present invention, of the two beams, one beam is applied to the optical disk for the beginning portion of the recording signal, and the other beam is applied to the optical disk for a period corresponding to the recording signal to record on the optical disk. Since the signal is recorded, the conventional semiconductor laser drive circuit that does not perform the recording correction can be directly applied to the beam for recording the recording signal of the two beams, and the optical output of the semiconductor laser is insufficient due to the recording correction. Therefore, the same result as the conventional recording correction can be obtained. In addition, since the intensity of the beam emitted to the beginning of the recording signal is made variable according to the length interval of the recording signal, the recording correction amount can be arbitrarily determined, and more detailed recording correction can be performed. Becomes Since the irradiation time of the beam irradiating the head part of the recording signal is made variable according to the length interval of the recording signal, the correction part can be controlled independently of the recording waveform, and the irradiation time of the correction part can be delicately changed. Optimal recording is possible by changing it.
【０００７】[0007]
【実施例】図１は本発明の一実施例に係る光ディスクへ
の情報記録方法を実施した場合の各種の波形図である。
本発明に係る光ディスクへの情報記録方法による記録波
形の立上がりの記録補正に関して、図１を用いて説明す
る。図１の(a) の記録信号を記録しようとする場合に
は、まず、図１の（b)に示す記録信号の先頭部分と同じ
記録波形の先行する補助記録ビームにて、光ディスクの
所定位置に照射して従来の信号立上がり部分に相当する
補正を行う。次に、その補助記録ビームによって光ディ
スクの温度がある程度上昇した時点にて図１の(c) に示
す記録信号と同じ記録波形の後行する記録ビームにて、
記録信号に応じた期間について光ディスクの前記所定位
置と同じ位置に照射を行い、光ディスクに記録信号を記
録する。このとき、補助記録ビームの強度、照射時間を
最適に選ぶことにより、光ディスク上での温度分布は、
図１の(d) に示すように従来より立上がりが急峻となる
ために、図１の(e) に示す記録信号のマーク形状は、従
来に比較してより理想的な形となる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram of various waveforms when an information recording method for an optical disk according to an embodiment of the present invention is implemented.
The recording correction of the rising edge of the recording waveform by the method for recording information on the optical disc according to the present invention will be described with reference to FIG. When recording the recording signal of FIG. 1 (a), first, the auxiliary recording beam having the same recording waveform as the head portion of the recording signal shown in FIG. Then, the correction corresponding to the conventional signal rising portion is performed. Next, when the temperature of the optical disk rises to some extent by the auxiliary recording beam, a recording beam following the same recording waveform as the recording signal shown in (c) of FIG.
Irradiation is performed on the same position as the predetermined position on the optical disk for a period corresponding to the recording signal, and the recording signal is recorded on the optical disk. At this time, the temperature distribution on the optical disc can be calculated by optimally selecting the intensity of the auxiliary recording beam and the irradiation time.
As shown in (d) of FIG. 1, the rising edge is steeper than in the conventional case, so that the mark shape of the recording signal shown in (e) of FIG. 1 is more ideal than in the conventional case.
【０００８】従って、これを再生した場合、従来よりＳ
／Ｎ比の高い再生信号が得られる。また、理想的な形状
のマークが形成できるため、従来に比較してより高密度
化に適した記録方法であるといえる。また、先行する補
助記録ビームは後行する記録ビームとの光出力の和とし
て、光ディスクに作用するために、それぞれのビームは
従来の記録補正の場合よりも光出力を必要としない。ま
た、各ビームの光出力の設定値自体は記録時には１つの
値であるため、半導体レーザの光出力の駆動回路自体
は、従来の記録補正しない半導体レーザの駆動回路をそ
のまま流用できる。上述の実施例では補助記録ビームを
先行ビームとし、記録ビームを後行ビームとしたが、補
助記録ビームと記録ビームを同時に光ディスク上に照射
するようにしても、上述の実施例と同様の作用、効果を
奏することはいうまでもない。また、上述の実施例では
二つのビームの光源部を別体とし説明してきたが、マル
チビーム半導体レーザを使用しても良く、この場合、光
源部にて50μm 程度の間隔でモノリシックに形成されて
いるものであれば、単一のコリメータレンズ、対物レン
ズにてディスク上で数μm の間隔に配置することが十分
容易である。本発明は、マルチビームレーザの記録時の
二つのビームに関してのみ述べてきたが、残りのビーム
に関しては低い光出力にて使用し、リード アフター
ライト用にしてもよい。また、再生時には、これらのビ
ームを独立に検出して、各ビームの再生出力を時間的に
位相差を調整して再生し平均することで、信号のＳ／Ｎ
比を向上させることも可能である。Therefore, when this is reproduced, the S
A reproduced signal having a high / N ratio can be obtained. Further, since a mark having an ideal shape can be formed, it can be said that this is a recording method suitable for higher density as compared with the conventional method. Further, since the preceding auxiliary recording beam acts on the optical disk as the sum of the optical outputs of the following auxiliary recording beams, each beam requires less optical output than in the case of the conventional recording correction. Further, since the set value itself of the optical output of each beam is one at the time of recording, the conventional drive circuit of the semiconductor laser which does not perform recording correction can be used as it is as the drive circuit of the optical output of the semiconductor laser. Although the auxiliary recording beam is the preceding beam and the recording beam is the following beam in the above-mentioned embodiment, even if the auxiliary recording beam and the recording beam are simultaneously irradiated onto the optical disk, the same operation as in the above-mentioned embodiment, It goes without saying that it has an effect. Further, in the above-mentioned embodiment, the light source section for the two beams has been described as a separate body, but a multi-beam semiconductor laser may be used. In this case, the light source section is formed monolithically at intervals of about 50 μm. If it does, it is easy enough to place it on the disk with a single collimator lens and objective lens at intervals of several μm. Although the present invention has been described only with respect to two beams during recording of a multi-beam laser, the remaining beams are used at a low optical power and read-after.
May be used for lights. Further, at the time of reproduction, these beams are detected independently, and the reproduction output of each beam is reproduced by averaging by adjusting the phase difference with respect to time, and the signal S / N
It is also possible to improve the ratio.
【０００９】[0009]
【発明の効果】以上のように本発明によれば、補助記録
ビームと記録ビームとの二つのビームの重ね合わせにて
記録補正するようにしたので、記録補正による半導体レ
ーザの光出力不足を解消できると共に、半導体レーザの
駆動回路の負担をなくすることができるという効果を有
する。また、補助記録ビームの強度及び照射時間を変え
ることにより、従来よりも細かな記録補正が行えるた
め、より理想的なマーク形状の記録信号を記録すること
ができ、より記録密度を向上させることができるという
効果を有する。As described above, according to the present invention, the recording correction is performed by superposing the two beams of the auxiliary recording beam and the recording beam, so that the shortage of the optical output of the semiconductor laser due to the recording correction is solved. In addition to that, there is an effect that the load on the drive circuit of the semiconductor laser can be eliminated. Further, by changing the intensity of the auxiliary recording beam and the irradiation time, finer recording correction can be performed than in the past, so that a more ideal mark-shaped recording signal can be recorded, and the recording density can be further improved. It has the effect of being able to.
【図１】図１は本発明の一実施例に係る光ディスクへの
情報記録方法を実施した場合の各種の波形図である。FIG. 1 is various waveform diagrams when an information recording method for an optical disc according to an embodiment of the present invention is implemented.
【図２】図２は従来の光ディスクへの情報記録方法を実
施した場合の各種の波形図である。FIG. 2 is various waveform charts when a conventional method of recording information on an optical disc is carried out.
Claims (3)
とによって、該光ディスクに記録信号を記録する光ディ
スクへの情報記録方法であって、前記二つのビームを前
記ディスク上で熱的な相互作用を十分与えるような距離
に照射し、前記二つのビームのうち、一方のビームを前
記記録信号の先頭部分について前記光ディスクに照射
し、他方のビームを前記記録信号に応じた期間前記光デ
ィスクに照射することを特徴とする光ディスクへの情報
記録方法。1. A method for recording information on an optical disc, wherein a recording signal is recorded on the optical disc by irradiating the optical disc with the two beams, wherein the two beams have sufficient thermal interaction on the disc. Irradiating a given distance, irradiating one of the two beams to the optical disc with respect to the head portion of the recording signal, and irradiating the other beam to the optical disc for a period corresponding to the recording signal. A method of recording information on an optical disc which is a feature.
さ間隔に応じて可変としたことを特徴とする請求項１記
載の光ディスクへの情報記録方法。2. The method of recording information on an optical disc according to claim 1, wherein the intensity of the one beam is variable according to the length interval of the recording signal.
の長さ間隔に応じて可変としたことを特徴とする請求項
１記載の光ディスクヘの情報記録方法。3. The method for recording information on an optical disc according to claim 1, wherein the irradiation time of the one beam is made variable according to the length interval of the recording signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4305262A JPH06162506A (en) | 1992-11-16 | 1992-11-16 | Informtion recording method to optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4305262A JPH06162506A (en) | 1992-11-16 | 1992-11-16 | Informtion recording method to optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06162506A true JPH06162506A (en) | 1994-06-10 |
Family
ID=17942987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4305262A Pending JPH06162506A (en) | 1992-11-16 | 1992-11-16 | Informtion recording method to optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06162506A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009238282A (en) * | 2008-03-26 | 2009-10-15 | Sony Corp | Optical recording method and optical recording apparatus |
-
1992
- 1992-11-16 JP JP4305262A patent/JPH06162506A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009238282A (en) * | 2008-03-26 | 2009-10-15 | Sony Corp | Optical recording method and optical recording apparatus |
| US8165005B2 (en) | 2008-03-26 | 2012-04-24 | Sony Corporation | Optical recording method and optical recording apparatus |
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