JPS58158041A - Optical information recording method - Google Patents
Optical information recording methodInfo
- Publication number
- JPS58158041A JPS58158041A JP57041464A JP4146482A JPS58158041A JP S58158041 A JPS58158041 A JP S58158041A JP 57041464 A JP57041464 A JP 57041464A JP 4146482 A JP4146482 A JP 4146482A JP S58158041 A JPS58158041 A JP S58158041A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- information
- recording
- period
- laser beam
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
-
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、例えばレーザビームを利用して光学的ζ二情
報を記録する方法に関するものであり、より忠実な情報
信号の再生!可能にぜんとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of optically recording ζ2 information using, for example, a laser beam, and more faithful reproduction of information signals! It is completely possible.
最近(:於いて、映倫信号、背戸信号等の情報信号に墓
いて、レーザビームY光変−し、この変−されたレーザ
ビームンディスク〔?シタイブのホトレジスト(11が
一様に均一の厚みにて塗布されているガラス基板(2)
よりなるディスク、$1図参照〕題;照射し、更に曳儂
処理等を施してこのディスク上C:凹凸パターン(ビッ
ト)を形成することζ二より、情報を記録することが提
案されている(例えば特開昭53−123905号に開
示されている)、そして、このディスクを原盤として、
情報記録ディスクt’s製するのである。Recently, in response to information signals such as the Eirin signal and the back door signal, the laser beam Y light has been changed, and this changed laser beam disk [?Site type photoresist (11 is uniformly Glass substrate being coated (2)
[Refer to Figure $1] Title: Forming a concavo-convex pattern (bit) on this disc by irradiating it and then performing a rolling process etc. From ζ2, it is proposed to record information. (for example, disclosed in Japanese Patent Application Laid-open No. 123905/1983), and using this disc as a master,
Information recording discs are manufactured by T's.
ところで、光レーザビームとディスク上6二記録される
ピッ)の関係は第1図C;示す通りである。Incidentally, the relationship between the optical laser beam and the 62 pitches recorded on the disk is as shown in FIG. 1C.
第1図(1)はディスク上a;集束された際のレーザビ
ームの強度分布(これはガラス分布に近いものとなって
いる)な示しており、横軸はレーザビームの径を示して
いる。第1図(1G)は現偉処理工程を経た後6:得ら
れるビットの形状を示しており、(111)は所定の厚
みのホトレジス) (llt’取り去るの′に心嚢な光
強度、(鵞りはホトレジスト(1)の光強度の閾値を示
している。 (Ms)(at)はホトレジス)fi理及
び場慣処理工程に依存して規定されるものであり、そし
てこの(ms)(Ily)(;よりビットの幅及びエツ
ジ形状が決定されるのである。Figure 1 (1) shows the intensity distribution of the laser beam when focused on the disk (this is close to the glass distribution), and the horizontal axis shows the diameter of the laser beam. . Figure 1 (1G) shows the shape of the bit obtained after undergoing the processing step, (111) is a photoresist of a predetermined thickness) The scale indicates the threshold of light intensity of the photoresist (1). The bit width and edge shape are determined by Ily)(;.
さて、ここで第2図(&ロー示すデジタル情報信号を記
録することを考える。この情報信号;;てレーザビーム
を変調すると、$2図0):二示す如き強度分布l有す
る記録レーザビームが得られる。この記録レーザビーム
に対応してディスク上(:は、第2図(0ロニ示す如き
ビットが形成される。斯かるビットを有するディスクよ
り情報を再生すると、その再生信号は完全な短形波とは
ならずビットのエツジ形状に対応してなまるのであるが
、これを波形整形すれば、@2図(d)(=示す如き再
生信号が得られる。この再生信号((11v記録信号(
a)と比較すれば、ハイレベルの期間が再生信号(+1
)の方が2t。Now, let us consider recording the digital information signal shown in Figure 2 (&row). If we modulate the laser beam with this information signal, the recording laser beam will have an intensity distribution l as shown in Figure 2. can get. Corresponding to this recording laser beam, bits as shown in Figure 2 (0roni) are formed on the disk. When information is reproduced from a disk having such bits, the reproduced signal becomes a complete rectangular wave. However, by shaping the waveform, a reproduced signal as shown in Figure 2 (d) (=) can be obtained. This reproduced signal ((11v recording signal (
Compared to a), the high level period is the playback signal (+1
) is 2t.
だけ長くなっていることが分る。即ち、再生信号+(1
1のデユーティは情報信号とは相違し、歪みが発生する
ことになる。これは、記録レーザビームかとに基因して
いる@ [1)(1!lv適切なる値に設定すること(
二より斯かる不都合を解消することは可能であるが、そ
うすると、ビット幅が小さくなる、ビットのエツジの形
状が良好でなくなる等の欠点ン生じる。You can see that it is getting longer. That is, the reproduced signal + (1
The duty of 1 is different from the information signal, and distortion will occur. This is due to the recording laser beam.
Although it is possible to eliminate these disadvantages, doing so would result in disadvantages such as the bit width becoming smaller and the shape of the edge of the bit becoming less favorable.
そこで、本発明に於いては、情報に応じて変調された元
ビームの強弱の期間!、若干補正することにより、上述
した不都合を解消せんとするものである。Therefore, in the present invention, the period of strength of the original beam modulated according to the information! , the above-mentioned inconvenience is attempted to be resolved by making some corrections.
以下、本発明を実現する為の装置のブロックダイヤグラ
ムを示す第3図、及びその動作波形図を示す第4図を参
照して、説明する。The following description will be made with reference to FIG. 3 showing a block diagram of an apparatus for implementing the present invention, and FIG. 4 showing its operating waveform diagram.
記録情報発生回路(31より記録すべき情報信号(第4
図1)が発生されるが、この情報信号(alの立下りに
応答してワンVヨyト回路(4)が駆動され、第4図+
1)11−示す如き一定幅(tl)の補正パルスが出力
される。この幅t1はtt==2toとなり・ている、
情報信号(1)及び補正パルス+1)lは加算回路(5
1にて加算され、その加算出方(第4図0)t’反転回
路(6)に印加して反転信号(第4図d)ン得る。The information signal to be recorded (fourth
1) is generated, but in response to the fall of this information signal (al), the one-V Yoyto circuit (4) is driven, and as shown in FIG.
1) 11--A correction pulse of a constant width (tl) as shown is output. This width t1 is tt==2to.
The information signal (1) and the correction pulse +1)l are connected to the adder circuit (5
1, and the result of the addition (FIG. 4 0) is applied to the t' inversion circuit (6) to obtain an inverted signal (FIG. 4 d).
この信号(illで、記録レーザビームを変■して、デ
ィスク上にピッ)Y形成する。而して、信号((11の
ハイレベル期間(例えばTO)(二対応してビットの凹
部が形成されるよう(:即ち信号(+1)のハイレベル
期間が記録レーザビームの強光度期間となるよう(:変
調し記録すれば、その再生信号はtl(=2t6)だけ
拡張された信号となり、これは元の記録信号(alのロ
ーレベル期間(〒1)に対応したものとなる。即ち、再
生信号のデユーティ比は記録信号と同一となる。This signal (ill) changes the recording laser beam to form a beam on the disk. Thus, a bit concave portion is formed corresponding to the high level period (for example, TO) of the signal (11) (i.e., the high level period of the signal (+1) becomes the intense luminous intensity period of the recording laser beam. If it is modulated and recorded, the reproduced signal becomes a signal extended by tl (=2t6), which corresponds to the low level period (〒1) of the original recording signal (al). That is, The duty ratio of the reproduced signal is the same as that of the recorded signal.
尚、第4図の場合、記録信号e)のローレベル期間を記
録レーザビームの強光度期間に対応させたので、再生信
号の正負論理は112図の場合と通口なるが、再生信号
の正負論理を反転させれば、第を図と同様の信号を得る
ことができる。In the case of Fig. 4, the low level period of the recording signal e) corresponds to the high intensity period of the recording laser beam, so the positive/negative logic of the reproduced signal is the same as in the case of Fig. 112, but the positive/negative logic of the reproduced signal By inverting the logic, a signal similar to that shown in Figure 1 can be obtained.
上述した実施例は、感光性フォトレジストが塗付された
原盤に記録する場合であったが、勿論光により記録可能
な金属材料、無機材料及び樹脂等を利用した場合にも適
用可能である。記録材料により補正パルスの幅が異なる
ことは勿論である。In the above-described embodiment, recording was performed on a master disc coated with a photosensitive photoresist, but it is of course also applicable to cases where optically recordable metal materials, inorganic materials, resins, etc. are used. Of course, the width of the correction pulse varies depending on the recording material.
更(−、ワンVヨ7ト回路は、立上りに対応して駆動さ
せても艮い。Furthermore, it is no problem to drive the one-V, one-V, and 7-to-7 circuits in response to the rising edge.
以上述べた本発明I:依れば、元ビームを利用して記録
する場合、情報に応じて変調される光ビームの強弱期間
を党ビームの強I分布に基いて補正する構成としたので
、再生信号の歪みt解消することができる。それ故、光
強度CBB )(E! )はフォトレジストの特性等を
考慮して最適なビット幅及びエツジ形状が得られるよう
ζ;決足することができる。According to the present invention I described above, when recording using the original beam, the intensity period of the light beam modulated according to information is corrected based on the intensity I distribution of the party beam, so that Distortion t of the reproduced signal can be eliminated. Therefore, the light intensity CBB)(E!) can be determined so as to obtain the optimum bit width and edge shape, taking into consideration the characteristics of the photoresist.
$1図は元ビームとビットの関係を示す図、第2図は従
来の記録方法の説明(:供する図、183図は本発明に
係る方法を実現する為の装置のブロックダイヤグラム、
第4図は本発明の記録方法の説明に供する図である。
(31は記録情報発生回路、(4)はワンショット回路
、(5)は加算回路、(6)は反転回路。Figure 1 is a diagram showing the relationship between the original beam and the bits, Figure 2 is a diagram explaining the conventional recording method, Figure 183 is a block diagram of a device for realizing the method according to the present invention,
FIG. 4 is a diagram for explaining the recording method of the present invention. (31 is a recording information generation circuit, (4) is a one-shot circuit, (5) is an addition circuit, and (6) is an inversion circuit.
Claims (1)
記録媒体C二照射し、光ビームの光強度変化に対応した
パターン1に:前記情報記録媒体上1二形成すること(
′:より情報を記録する方法C;於いて、前記情報(二
応じて変調される元ビームの強刺の期間t。 光ビームの強度分布に基いて補正することを特徴とする
光学的情報記録方法。(1) To record information to be recorded; irradiate the information recording medium C with a modulated light beam to form a pattern 1 on the information recording medium corresponding to changes in the light intensity of the light beam.
′: Method C of recording information from the above information (2): an optical information recording characterized in that the information is corrected based on the intensity distribution of the light beam; Method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57041464A JPS58158041A (en) | 1982-03-15 | 1982-03-15 | Optical information recording method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57041464A JPS58158041A (en) | 1982-03-15 | 1982-03-15 | Optical information recording method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58158041A true JPS58158041A (en) | 1983-09-20 |
Family
ID=12609093
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57041464A Pending JPS58158041A (en) | 1982-03-15 | 1982-03-15 | Optical information recording method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58158041A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61237233A (en) * | 1985-04-15 | 1986-10-22 | Mitsubishi Electric Corp | Signal recording device |
JPS6353722A (en) * | 1986-08-22 | 1988-03-08 | Hitachi Ltd | Recording and reproducing device for optical disk |
JPH09120537A (en) * | 1996-09-17 | 1997-05-06 | Hitachi Ltd | Optical disk recording/reproducing device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5611628A (en) * | 1979-07-04 | 1981-02-05 | Fuji Photo Film Co Ltd | Laser recording method |
JPS5778637A (en) * | 1980-10-31 | 1982-05-17 | Matsushita Electric Ind Co Ltd | Optical information recorder |
-
1982
- 1982-03-15 JP JP57041464A patent/JPS58158041A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5611628A (en) * | 1979-07-04 | 1981-02-05 | Fuji Photo Film Co Ltd | Laser recording method |
JPS5778637A (en) * | 1980-10-31 | 1982-05-17 | Matsushita Electric Ind Co Ltd | Optical information recorder |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61237233A (en) * | 1985-04-15 | 1986-10-22 | Mitsubishi Electric Corp | Signal recording device |
JPH0658741B2 (en) * | 1985-04-15 | 1994-08-03 | 三菱電機株式会社 | Signal recording / reproducing device |
JPS6353722A (en) * | 1986-08-22 | 1988-03-08 | Hitachi Ltd | Recording and reproducing device for optical disk |
JPH09120537A (en) * | 1996-09-17 | 1997-05-06 | Hitachi Ltd | Optical disk recording/reproducing device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA1212762A (en) | Method and apparatus for recording digital signals on an optical disc | |
US5605782A (en) | Method of maufacturing a master disc and an apparatus for carrying out the method | |
JPS61216126A (en) | Optical recording system | |
JP2643780B2 (en) | Information recording / reproducing device | |
JPS58158041A (en) | Optical information recording method | |
JPS6318263B2 (en) | ||
JP3703040B2 (en) | Recording medium recording apparatus, recording medium recording method, and recording medium | |
JP3344653B2 (en) | Optical disc manufacturing method | |
JP2000276780A (en) | Method for working master disk for optical disk, stamper, and optical disk | |
JPS62281124A (en) | Optical information recorder | |
JPS5821335B2 (en) | Enbanji Yojiyouhoushingoukirokubaitai | |
JPH11250506A (en) | Optical disk and exposing method of optical master disk | |
JP3274986B2 (en) | Pit length adjusting device, optical disk master exposure device, and optical disk drive device | |
JP4606690B2 (en) | Optical disc master exposure apparatus and optical disc master manufacturing method | |
EP0884721A1 (en) | Recorder | |
JPH05234146A (en) | Optical disk and recording method for master disk of optical disk | |
JPH09231569A (en) | Production of master optical disk | |
JPH03183024A (en) | Recording method for optical information recording medium | |
JPH0229928A (en) | Optical disk device | |
JP2639841B2 (en) | Recording device | |
JPH09259477A (en) | Device and method for exposing master disk | |
JPH0419837A (en) | Optical information recording medium | |
JPS5922240A (en) | Recording device of digital information | |
JPS63261537A (en) | Erasing method for optical information | |
JP2000276782A (en) | Stamper and optical disk |