JP2869146B2 - Optical information recording medium - Google Patents
Optical information recording mediumInfo
- Publication number
- JP2869146B2 JP2869146B2 JP2155125A JP15512590A JP2869146B2 JP 2869146 B2 JP2869146 B2 JP 2869146B2 JP 2155125 A JP2155125 A JP 2155125A JP 15512590 A JP15512590 A JP 15512590A JP 2869146 B2 JP2869146 B2 JP 2869146B2
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- guide groove
- information
- information recording
- 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.)
- Expired - Fee Related
Links
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Recording Or Reproduction (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、案内溝を有する追記型または書き換え可
能型の光学式情報記録媒体に関するものである。The present invention relates to a write-once or rewritable optical information recording medium having a guide groove.
追記型または書き換え可能型の光学式情報記録媒体と
しての光ディスクは、トラッキングのために、例えば案
内溝が形成されるとともに、案内溝の中または案内溝間
に所定の間隔で凹凸ピットの形でアドレス情報、クロッ
ク情報などがあらかじめ設けられている。An optical disc as a write-once or rewritable optical information recording medium has, for example, guide grooves formed for tracking, and addresses in the form of concave and convex pits at predetermined intervals in or between the guide grooves. Information, clock information, and the like are provided in advance.
しかしながら、アドレス情報などの凹凸ピットが形成
されている領域は、情報記録領域として利用できない。However, an area where uneven pits such as address information are formed cannot be used as an information recording area.
また、アドレス情報はできるだけ多く記録されている
ことが望ましいが、アドレス情報を多く記録すると、情
報記録領域が少なくなり、記録できる情報量が少なくな
ってしまう。It is desirable that the address information is recorded as much as possible. However, if the address information is recorded as much as possible, the information recording area is reduced and the amount of recordable information is reduced.
そこで、最近、第４図に示すように、アドレス情報信
号で周波数変調した搬送波信号に応じて蛇行させた案内
溝G1を有する追記型の光ディスクＤが提案されている。Therefore, recently, as shown in FIG. 4, the optical disc D of the write-once with a guide groove G 1 which is meandering in response to the carrier signal which is frequency modulated with the address information signals has been proposed.
なお、この案内溝G1の横幅は一定であり、案内溝G1の
両縁部g11,g12のうねりは同一である。The horizontal width of the guide groove wherein G 1 is fixed, the undulation of the opposite edges g 11, g 12 of the guide groove G 1 is identical.
このような案内溝付の光ディスクＤは、光学式ビデオ
ディスクやコンパクトディスクのディスク作成プロセス
を略そのまま使用して作成できる。The optical disk D having such a guide groove can be created by using the optical disk or compact disk creating process substantially as it is.
すなわち、ガラス基板上にホトレジストを所定の厚さ
でスピンコートし、アドレス信号で周波数変調した搬送
波信号に応じてアルゴンレーザなどの光ビームを偏向器
によって蛇行させながら照射し、現像して得られた原盤
からスタンパを作成し、このスタンパによって形成され
た合成樹脂製のディスク基板上に記録層、保護層などを
形成することにより、上述したような案内溝付の光ディ
スクＤが得られる。That is, a photoresist was spin-coated on a glass substrate with a predetermined thickness, and irradiated with a light beam such as an argon laser meandering by a deflector in accordance with a carrier signal frequency-modulated by an address signal, and then developed to obtain. By forming a stamper from the master and forming a recording layer, a protective layer, and the like on a synthetic resin disk substrate formed by the stamper, the above-described optical disk D with a guide groove can be obtained.
ところで、上記した従来の追記型の光ディスクＤにお
いて、案内溝G1に多重できる付加情報は搬送波信号の周
波数をタイミング情報として用いれば、アドレス情報と
タイミング情報の２種類となるが、これら以外の種々の
情報を多重記録して記録密度を向上させることが望まれ
ている。Incidentally, in the optical disc D of the conventional write-once type as described above, by using the frequency of the additional information carrier signals that can be multiplexed in the guide grooves G 1 as timing information, although the two types of address and timing information, different than these It is desired to improve the recording density by multiplex-recording the above information.
この発明は、上記した要望に応えるためになされたも
ので、案内溝の両縁部に複数種類の情報をそれぞれ多重
記録させて記録密度を向上させた光学式情報記録媒体を
提供するものである。SUMMARY OF THE INVENTION The present invention has been made in order to meet the above-mentioned demand, and provides an optical information recording medium in which a plurality of types of information are multiplex-recorded on both edges of a guide groove to improve a recording density. .
この発明にかかる光学式情報記録媒体は、光学的に情
報を書き込むべき表面に案内溝が形成され、前記案内溝
の中または前記案内溝間に情報を記録する光学式情報記
録媒体において、 前記案内溝の一方の縁部を第１の付加情報により周波
数変調された第１の搬送波信号で蛇行させ、前記案内溝
の他方の縁部を第２の付加情報により周波数変調された
第２の搬送波信号で蛇行させる。An optical information recording medium according to the present invention is an optical information recording medium in which a guide groove is formed on a surface where information is to be optically written, and information is recorded in or between the guide grooves. One edge of the groove is meandered with a first carrier signal frequency-modulated by the first additional information, and the other edge of the guide groove is a second carrier signal frequency-modulated by the second additional information. To meander.
この発明における光学式情報記録媒体は、案内溝の両
縁部をそれぞれの付加情報によって周波数変調された搬
送波信号に応じてうねらせたので、両縁部のうねりをそ
れぞれ検出することにより、両縁部から複数種類の情報
をそれぞれ検出することができる。In the optical information recording medium according to the present invention, both edges of the guide groove are undulated according to the carrier signal frequency-modulated by the respective additional information. A plurality of types of information can be respectively detected from the unit.
以下、この発明の実施例を図に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１図はこの発明の一実施例による光学式情報記録媒
体の一部分を示す平面図であり、G2は光ディスクＤ上に
形成された案内溝を示し、一方の縁部g21を第１の付加
情報で周波数変調した第１の搬送波信号に応じて蛇行さ
せ、かつ、他方の縁部g22を第２の付加情報で周波数変
調した第２の搬送波信号に応じて蛇行させてある。Figure 1 is a plan view of a portion of the optical information recording medium according to one embodiment of the invention, G 2 represents a guide groove formed on the optical disc D, and one edge g 21 first additional information is meandering in response to a first carrier signal frequency-modulated, and are allowed to meander in response to a second carrier signal by frequency-modulating the other edge g 22 in the second additional information.
なお、第１および第２の搬送波信号の周波数は、サー
ボ信号およびデータに妨害を与えない周波数が選択され
ている。The frequencies of the first and second carrier signals are selected so as not to interfere with the servo signal and the data.
次に、この発明の光学式情報記録媒体の原盤を作成す
る光学式情報記録装置について、第２図に基づいて説明
する。Next, an optical information recording apparatus for producing an optical information recording medium master according to the present invention will be described with reference to FIG.
まず、アルゴンレーザなどのレーザ光源１から出たレ
ーザビームＬはハーフミラーなどの第１のビームスプリ
ッタ２によって２分され、一方のレーザビームＬは超音
波偏向器などの第１の光ビーム偏向器4Aに供給され、他
方のレーザビームＬは第１のミラー３で反射されて超音
波偏向器などの第２の光ビーム偏向器4Bに供給される。First, a laser beam L emitted from a laser light source 1 such as an argon laser is split into two by a first beam splitter 2 such as a half mirror, and one laser beam L is split into a first light beam deflector such as an ultrasonic deflector. 4A, the other laser beam L is reflected by the first mirror 3 and supplied to a second light beam deflector 4B such as an ultrasonic deflector.
そして、分割された両レーザビームＬは第１または第
２の光ビーム偏向器4A,4Bにより、第１または第２の付
加情報信号に応じてそれぞれ微少振動が与えられる。Then, the divided laser beams L are given minute vibrations by the first or second light beam deflectors 4A and 4B in accordance with the first or second additional information signal.
すなわち、第１の搬送波信号発生回路5Aからの第１の
搬送波信号fC1（第３図（ａ））と第１の付加情報信号
発生回路6Aからの第１の付加情報信号fV1（第３図
（ｂ））が第１のFM変調回路7Aに供給され、第１のFM変
調回路7Aは第１の搬送波信号fC1を第１の付加情報信号f
V1で周波数変調した第１の搬送波信号FFM1（第３図
（ｃ））を出力するので、第１のゲート信号発生回路8A
から第１のゲート回路9Aに第１のゲート信号S1のオン信
号（第３図（ｄ））を出力すると、第１の搬送波信号f
FM1（第３図（ｅ））は第１のゲート回路9A、第１の増
幅回路10Aを介して第１の光ビーム偏向器4Aに供給され
る。That is, the first carrier wave signal f C1 (FIG. 3A) from the first carrier wave signal generation circuit 5A and the first additional information signal f V1 (third wave) from the first additional information signal generation circuit 6A. (B) is supplied to the first FM modulation circuit 7A, and the first FM modulation circuit 7A converts the first carrier signal f C1 into the first additional information signal f.
Since the first carrier signal F FM1 (FIG. 3 (c)) frequency-modulated by V1 is output, the first gate signal generation circuit 8A
From the outputs of the first gate signals S 1 ON signal to the first gate circuit 9A (FIG. 3 (d)), the first carrier signal f
FM1 (FIG. 3 (e)) is supplied to a first light beam deflector 4A via a first gate circuit 9A and a first amplifier circuit 10A.
第１の光ビーム偏向器4Aは、周波数変調した第１の搬
送波信号fFM1（第３図（ｅ））が供給されると、レーザ
ビームＬを第１の搬送波信号fFM1に応じて偏向させると
ともに、案内溝形成方向と直行する方向に減少振動させ
た第１の１次回折光ビームL11を発生する。The first light beam deflector 4A deflects the laser beam L according to the first carrier signal f FM1 when the frequency-modulated first carrier signal f FM1 (FIG. 3E) is supplied. together, to generate a first first-order diffracted light beam L 11 with reduced vibration in a direction orthogonal to the guide groove forming direction.
同様に、第２の搬送波信号発生回路5Bからの第２の搬
送波信号fC2と第２の付加情報信号発生回路6Bからの第
２の付加情報信号fV2が第２のFM変調回路7Bに供給さ
れ、第２のFM変調回路7Bは第２の搬送波信号fC2を第２
の付加情報信号fV4で周波数変調した第２の搬送波信号f
FM2を出力するので、第２のゲート信号発生回路8Bから
第２のゲート回路9Bに第２のゲート信号S2のオン信号を
出力すると、第２の搬送波信号fFM2は第２のゲート回路
9B、第２の増幅回路10Bを介して第２の光ビーム偏向器4
Bに供給される。Similarly, the second carrier signal f C2 from the second carrier signal generation circuit 5B and the second additional information signal f V2 from the second additional information signal generation circuit 6B are supplied to the second FM modulation circuit 7B. Then, the second FM modulation circuit 7B converts the second carrier signal f C2 to the second
The second carrier signal f frequency-modulated with the additional information signal f V4 of
Since output FM2, and outputs the second on-signal of the gate signal S 2 to the second gate circuit 9B from the second gate signal generating circuit 8B, the second carrier signal f FM2 second gate circuit
9B, the second light beam deflector 4 via the second amplifier circuit 10B.
Supplied to B.
第２の光ビーム偏向器4Bは、周波数変調した第２の搬
送波信号fFM2が供給されると、レーザビームＬを第２の
搬送波信号fFM2に応じて偏向させるとともに、案内溝形
成方向と直行する方向に微少振動させた第２の１次回折
光ビームL21を発生する。When the frequency-modulated second carrier signal fFM2 is supplied, the second light beam deflector 4B deflects the laser beam L in accordance with the second carrier signal fFM2, and crosses the laser beam L in a direction perpendicular to the guide groove forming direction. generating a second first-order diffracted light beam L 21 obtained by fine vibrations in the direction.
なお、L10,L20は同時に発生する第１および第２の０
次光ビームであるが、これらは使用されない。Note that L 10 and L 20 are the first and second 0s generated simultaneously
These are the secondary light beams, but these are not used.
第１の光ビーム偏向器4Aから出た第１の１次回折光ビ
ームL11はハーフミラーなどの第２のビームスプリッタ1
2に入射し、第２の光ビーム偏向器4Bから出た第２の１
次回折光ビームL21は第２のミラー11を介して第２のビ
ームスプリッタ12に入射し、反射される。First light beam deflector first first-order exiting 4A diffracted beam L 11 and the second beam splitter such as a half mirror 1
2 and exits from the second light beam deflector 4B.
Order diffracted light beam L 21 is incident on the second beam splitter 12 via the second mirror 11, is reflected.
この第１および第２の１次回折光ビームL11,L21は、
案内溝形成方向と直交する方向に並び、一部が重なり合
うように第２のミラー11などによって調整され、記録光
学系13を構成するミラー13a、対物レンズ13bを介してガ
ラス円板上にホトレジストが塗布された原盤Ｒのホトレ
ジスト面に結像する。The first and second first-order diffracted light beams L 11 and L 21 are:
The photoresist is arranged on the glass disk via the mirror 13a and the objective lens 13b, which are arranged in the direction orthogonal to the guide groove forming direction, are adjusted by the second mirror 11 and the like so as to partially overlap each other, and constitute the recording optical system 13 and the objective lens 13b. An image is formed on the photoresist surface of the applied master R.
原盤Ｒはモータ14bによって駆動されるターンテーブ
ル14a上に装着され、基準信号発生回路14eからの基準信
号を受けたモータ駆動回路14cは駆動信号を発生してモ
ータ14bに供給し、ターンテーブル14aに装着した原盤Ｒ
を回転させている。The master R is mounted on a turntable 14a driven by a motor 14b, and a motor drive circuit 14c that receives a reference signal from a reference signal generation circuit 14e generates a drive signal and supplies the drive signal to the motor 14b. Master R attached
Is rotating.
また、記録光学系13は、基準信号発生回路14eからの
基準信号を受けた送り機構部分14dにより、回転する原
盤Ｒの半径方向に移動する。Further, the recording optical system 13 is moved in the radial direction of the rotating master R by the feed mechanism part 14d which has received the reference signal from the reference signal generation circuit 14e.
このように、異なる付加情報信号に応じてそれぞれ微
少振動させた２本のビームを案内溝形成方向と直交する
方向に並べるとともに、一部が重なり合うようにホトレ
ジスト面上に結像させて露光することにより、第１図に
示したように蛇行した案内溝G2が形成できる。In this manner, two beams vibrated slightly in accordance with different additional information signals are arranged in a direction orthogonal to the guide groove forming direction, and an image is formed on a photoresist surface so as to partially overlap and exposure is performed. Accordingly, meandering guide grooves G 2 can be formed as shown in Figure 1.
以上のように、この発明によれば、案内溝の両縁部を
それぞれの付加情報に応じて独立に蛇行させたので、案
内溝の両縁部に複数種類の情報をそれぞれ多重記録で
き、記録密度を向上させることができる。As described above, according to the present invention, since both edges of the guide groove are independently meandered according to the additional information, a plurality of types of information can be multiplex-recorded on both edges of the guide groove. Density can be improved.
第１図はこの発明の一実施例による光学式情報記録媒体
の一部分を示す平面図、 第２図は第１図に示した光学式情報記録媒体の原盤を形
成する光学式情報記録装置の構成を示すブロック図、 第３図（ａ）〜（ｅ）は第２図における一部の信号を示
す波形図、 第４図は従来の光学式情報記録媒体の一部分を示す平面
図である。 Ｄ……光ディスク、G2……案内溝、g12,g22……縁部。FIG. 1 is a plan view showing a part of an optical information recording medium according to an embodiment of the present invention, and FIG. 2 is a configuration of an optical information recording apparatus for forming a master of the optical information recording medium shown in FIG. 3 (a) to 3 (e) are waveform diagrams showing some signals in FIG. 2, and FIG. 4 is a plan view showing a part of a conventional optical information recording medium. D ...... optical disc, G 2 ...... guide groove, g 12, g 22 ...... edge.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G11B 7/24 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) G11B 7/24
Claims (1)
が形成され、前記案内溝の中または前記案内溝間に情報
を記録する光学式情報記録媒体において、 前記案内溝の一方の縁部を第１の付加情報により周波数
変調された第１の搬送波信号で蛇行させ、前記案内溝の
他方の縁部を第２の付加情報により周波数変調された第
２の搬送波信号で蛇行させたことを特徴とする光学式情
報記録媒体。1. An optical information recording medium in which a guide groove is formed on a surface on which information is to be written optically and information is recorded in or between the guide grooves, one edge of the guide groove. Is meandered by a first carrier signal frequency-modulated by the first additional information, and the other edge of the guide groove is meandered by a second carrier signal frequency-modulated by the second additional information. Characteristic optical information recording medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2155125A JP2869146B2 (en) | 1990-06-15 | 1990-06-15 | Optical information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2155125A JP2869146B2 (en) | 1990-06-15 | 1990-06-15 | Optical information recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0447536A JPH0447536A (en) | 1992-02-17 |
| JP2869146B2 true JP2869146B2 (en) | 1999-03-10 |
Family
ID=15599106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2155125A Expired - Fee Related JP2869146B2 (en) | 1990-06-15 | 1990-06-15 | Optical information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2869146B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02174505A (en) * | 1988-12-27 | 1990-07-05 | Yasuda Seisakusho Co Ltd | Joint carrier type metal block |
| US6724708B2 (en) | 2001-06-20 | 2004-04-20 | Matsushita Electric Industrial Co., Ltd. | Optical disk medium and method and apparatus for reading information |
| JP4618572B2 (en) * | 2009-02-16 | 2011-01-26 | 日本ビクター株式会社 | Information recording medium, information recording medium recording / reproducing method, information recording medium reproducing method, and information recording medium recording / reproducing apparatus |
-
1990
- 1990-06-15 JP JP2155125A patent/JP2869146B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0447536A (en) | 1992-02-17 |
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