JPS5888838A - Optical signal recording system - Google Patents

Optical signal recording system

Info

Publication number
JPS5888838A
JPS5888838A JP18585781A JP18585781A JPS5888838A JP S5888838 A JPS5888838 A JP S5888838A JP 18585781 A JP18585781 A JP 18585781A JP 18585781 A JP18585781 A JP 18585781A JP S5888838 A JPS5888838 A JP S5888838A
Authority
JP
Japan
Prior art keywords
recording
optical
beams
recording medium
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
Application number
JP18585781A
Other languages
Japanese (ja)
Inventor
Chisato Miyaoka
宮岡 千里
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP18585781A priority Critical patent/JPS5888838A/en
Publication of JPS5888838A publication Critical patent/JPS5888838A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To record a signal with high density, by forming a recording track at a land part between the optical grooves of an optical recording medium. CONSTITUTION:A laser beam source 7 is driven by a driving source 8 and produces a certain level of current in a reproduction mode and a pulse current corresponding to the information in a recording mode respectively. The waveheight value is varied to be set large in the recording mode and small in the reproduction mode. The laser beams given from a diode 7 are set in parallel to each other through a collimator lens 9 and then put into a diffraction grating 10 to produce a 0-order diffracted beam LB and the + or -1-order diffracted beams LB1 and LB2. These beams are made incident to a galvanomirror 13 via a polarized beam splitter 11 and a 1/4 wavelength plate 15. Then the reflected beams are focused by an objective lens 14 having large NA, and made incident on a recording medium 1 to focus there.

Description

【発明の詳細な説明】[Detailed description of the invention]

本発明は光学式記録媒体に1置情報を記録し得、その記
録情報を装置でも再生する仁とのできる光学式儒漫配電
再膨装置に験ける記録方式に関する。 かかる党**配電再生装置で使用される光学式Ia*厳
体は、飼えば低鵬点金属層を透@am層あるいr&ガラ
ス層でfノドイツチ状に挾んで形成したW/BIIk円
板である。そして、仁の記録円板に、パワーの大1な県
東レーずビームを情報に応じて照射してその金属層を部
分的に@@L、この溶融によるビットを渦巻状に配列し
て記録トラックを形成する。 かかる光学式信号記録再生装置で信号を記録する場合は
、装置の機械的振動、モータの軸振れ等のため、高密度
記録が困難である。即ち、再生専用の光学式記触媒体の
原盤への記録は、専用の高級な光学式信号配電装置を用
いているため、渦巻形の記録トラックのピッチが1.2
〜1.6μmとなるような高密度記録も可能であるが、
上述の記録再生装置による記録では、このような挾いト
ラックピッチの記録は頗る困難であった。 そこで、光学式信号記録再生装置の記録書度を上昇させ
るためk、従来光学式記録媒体く予め光学式のガイドト
ラックを設け、そのガイドを有用して信号の記録を行な
う方法がjIk案されている。 その従来の光学式信号記録方法を11111乃至菖3図
を参照して説嘴しよう。 11)は光学式記録媒体で、その−例(記録円板)の構
造なmiwI〜第3図について諷鞠する。12)は基体
(11えばアクリル等の樹脂あるいはガラス等の透明層
又は低反射率層)、(3)はその上の低融点金属層(テ
ルル、その合金、その酸化物等の夫々に低融点の純粋金
属1合金、金属献化物の層)、(4(は保■層(例えば
アクリル等の樹脂あるいはガラス畳の透明層)である。 gはその金属層(3)にレーザビームによって予め溶融
されて形成された光学的It(グループ)である。この
溝gは媒体(1)の金属層(3)上に12〜1.6μm
ピッチで円に近い渦巻状に形成されている。この製法は
次の通りである。原Ilにカッティングマシンで上記溝
に対応するものを作り、それ1碁にスタンパを作り、そ
のスタンパにより上記基体(2)を形成する。そして、
その基体(2)上に金属層
The present invention relates to a recording method for an optical power distribution re-expansion device that can record one-time information on an optical recording medium and reproduce the recorded information in the device. The optical type Ia used in such a power distribution regeneration device is strictly a W/BIIk disc formed by sandwiching a low-temperature metal layer between transparent @am layers or R&glass layers in the shape of an F-shaped plate. It is. Then, a Kento laser beam with the highest power is irradiated on the recording disk according to the information to partially melt the metal layer, and the bits created by this melting are arranged in a spiral to record. form a track. When recording signals with such an optical signal recording/reproducing device, high-density recording is difficult due to mechanical vibration of the device, axial vibration of the motor, and the like. That is, since a dedicated high-grade optical signal power distribution device is used to record on the master disk of the optical recording catalyst for reproduction only, the pitch of the spiral recording track is 1.2.
Although high-density recording of ~1.6 μm is possible,
In recording using the above-mentioned recording and reproducing apparatus, it is extremely difficult to record such narrow track pitches. Therefore, in order to increase the recording quality of optical signal recording and reproducing devices, a method has been proposed in which an optical guide track is provided in advance on a conventional optical recording medium and the signal is recorded using the guide. There is. The conventional optical signal recording method will be explained with reference to Figures 11111 to 3. 11) is an optical recording medium, and the structure of its example (recording disc) is illustrated in FIG. 12) is a substrate (for example, 11 is a resin such as acrylic or a transparent layer or a low reflectance layer such as glass), and (3) is a low melting point metal layer thereon (tellurium, its alloy, its oxide, etc. each having a low melting point). pure metal 1 alloy, layer of metal donation), (4) is a protective layer (for example, a resin such as acrylic or a transparent layer of glass tatami). This groove g is formed on the metal layer (3) of the medium (1) with a thickness of 12 to 1.6 μm.
It is formed in a spiral shape with a pitch close to a circle. The manufacturing method is as follows. A cutting machine is used to make a groove corresponding to the groove on the original plate, a stamper is made on it, and the base body (2) is formed using the stamper. and,
a metal layer on the substrate (2)

【3)をデポジットし、その
上に保躾層(4)を形成して、上記媒体(1)を得る。 そして、この光学的fl1gK沿ってその中にビットp
の列から成る記録トラックTを形成する。LBはそのビ
ットpを形成するための集束レーザビームを示す、又、
慮は金属層(3)上のランド部を示す。 しかし、かかる従来の光学式信号記録方法は、記録レー
ザビームが光学的溝gK照射された場合、戻りビームが
光路差変調やl1gのエツジ部での散亀変調を受けるた
め、ビットpf)形状が悪く、再生信号のへか低下する
という欠点があった。 かかる点KIilみ、本発明は光学的溝を備えた党学式
配電媒体に、再生信号の8/、が向上するよう虻、信号
を記録することのできる光学式信号記録方式を提案せん
とするものである。 以下に本発明をその一実施例につき詳aK*明するに、
1114図及び菖5aiiK示す如く、配電トラックT
K関連した光学的溝pの形成された光学式記録媒体+1
)の光学的溝gをトラッキングを採りながら副ビームL
B】、 LB2 Kて再生すると同時に、この副ビーム
LB l、LBzと所定位置関係にある主と−ムLBe
cて光字的l1g間のランド部gKピッ)pの列から残
る記録トラックTを形成する。こり記録トラックTはビ
ットpの列から構成される。このビットpは金属片(3
)のランドsLK透孔として形成される。 ’eXK、菖6図を参照して、本発明を適用した光学式
信号記録再生装置の一例を説明する。(6)はビーム発
生手段を示し、以下これについて説明する。 (7)はレーずビーム発生源で、ここでは牛導体レーザ
ダイオードである。(8)はこのダイオード(7)を駆
―する駆wIIIで、再生時は一定の電流を、記録時は
情報に応じたパルス電流を発生すると共和、その液高値
な記録時は大、再生時は小となるように可変する手段を
真備する。このダイオード(7)よりのレーザビーム(
発散ビーム)(球11i11[)はコリメータレンズ(
91によって平行ビーム(平置[)Kされた後、回折格
子QIK人射せしめて3つのビーム、即ちO次蘭折ビー
ム(主ビームLB )及び士1次闘折ビーム(菖1及び
諺2の脳ビームLBl。 LJ3g )を作り、これらヒ−ムLB、LBt、LB
zを偏光ビームスプリッタaυ−−波長板αりを経てト
ラツキンダずツー(ガルパ2ラー)03に入射せしめ、
その各反射ビームをNAの大なる対物レンズfi4Hc
よって集束せしめて記録媒体(1)上に焦点を結ぶよう
に入射ぜしめる。 そして、11411及び菖5図に示すよ5に、細ビーム
LB 1.IJ32が相隣る光学的溝(円(近い渦巻状
)厘を走査し、主ビームLBがその間σ〕ツンド部eを
走査するように、ビームLB 、 LBI、LB2の記
録媒体(1)上での配置関係を選定する。 記録媒体(1)よりの各反射ビームL B + LB 
r s IjBx番1対物レンズαトドラッキングミラ
ーaトー波畏板0の経絡を逆行して偏光ビームスプlJ
ツタQlに入射し、ここで反射されて後、フォーカス誤
差信号を得るための半円柱レンズ(円筒レンズ) (1
5−集束レンズ1Gの経路を通って主光検出器り並びに
第1及び第2の側光検出器・Dl、Dzの検出1ilr
#IC焦点を結ぶように入射する。 久に、この光検出器D 、 DI、D2につXl−て露
7図を#照して説明する。中央に主光検出器り、その両
側#C1111及び菖2の側光検出器[)1 、D2力
を配されている。尚、主光検出器りは左右上下の4つの
検出部から成っており、情報の再生信号を14つの検出
部のIIIL出信号の和とされ、再生時のフォーカスg
+ui信号は、各対角部の検出部の検出出力の和の蓋か
ら得られる。 主光検出器りからのフォーカス誤差信号&寡、入力端子
(lηを介して電流−電圧変換關路餞に供給され、その
出力がフォーカスサーボ増幅回路■を介して対物レンズ
α4のりニアモータの駆動用ボイスコイル&1jK供給
されて、再生時の対物レンズa4のフォーカスサーボが
行なわれる。記録時のフォーカスは固定とされる。 又 1111及び第2の両光検出器DI、D2の各検出
出力が夫々人力趨子(ハ)、c!3を介して電流−電圧
変換−1lI(財)、(ハ)く供給される。これら回路
(至)、(ハ)の出力は比軟器あるいは引算器としての
差動増幅−111kgaK供給される。主ビームLBは
記録時はパワーが強く、配電謀体(1)の金属層(3)
を溶融し、再生時は弱く、金属層(3)をI!Ii1に
シない。又、菖1及び謳2の關ビームIJI、LB2は
パワーが弱いため、金属層(3)を1lIIIllする
ことはない。 そして、道鋤増暢關路(至)の出力はトツツキングサー
ポ増暢關路gaに供給され、増mWA路(至)の出力は
トツツキンダンラー(13のコイル(至)に供給されて
、配電、再生時のトラッキングサーボが行なわれる。 この場合、トラッキングが採れているときは、差動増幅
−路(至)の出力は略零であり、トラッキングずれがあ
るとそれに応じた誤差電圧が得られ、トラッキングiツ
ーQ3を回動させてトラッキングが採れるようにする。 かぐして、主ビームLBは記録トラックT(ランド部層
)を正しく走査し、これにより信号がランドgtに記録
されると共和、主光検出器りより記録トラックTの情報
信号(例えばデータ信号)が再生される。 この装置では、光学的溝gを記録時及び再生時共に、ト
ラッキングガイドとして利用することができる。 上述せる本発明によれば、jt学的溝を備えた光学式記
録媒体の溝間のランドgK配電トラックを形成するので
、ビットがきれいに形成され、高配鍮一度を以って、且
つ再生信号のへか向上するよ5に、信号を記録すること
のできる光学式信号記録方式を得ることができる。 崗、副ビームは1本でも良く、その場合は、llIi党
検出湯の検出出力を基準値と比較して、トラッキング誤
差信号を得れば嵐い。
(3) is deposited and a protective layer (4) is formed thereon to obtain the medium (1). And along this optical fl1gK therein bit p
A recording track T consisting of columns is formed. LB indicates a focused laser beam for forming the bit p, and
The figure shows a land portion on the metal layer (3). However, in such a conventional optical signal recording method, when the recording laser beam is irradiated with the optical groove gK, the return beam undergoes optical path difference modulation and scattering modulation at the edge portion of l1g, so that the bit pf) shape is Unfortunately, there was a drawback that the reproduced signal deteriorated. In view of this point, the present invention proposes an optical signal recording method that can record signals on a power distribution medium equipped with optical grooves so as to improve the reproduction signal. It is something. The present invention will be explained in detail with respect to one embodiment thereof below.
As shown in Figure 1114 and Iris 5aiiK, the power distribution truck T
Optical recording medium with K-related optical grooves p+1
) while tracking the optical groove g of the sub beam L.
B], LB2 K and at the same time, the main beam LB, which is in a predetermined positional relationship with the sub beams LBl, LBz, is reproduced.
A remaining recording track T is formed from the land portion gK p) between the optical characters l1g and c). The stiffness recording track T is composed of a string of bits p. This bit p is a metal piece (3
) is formed as a land sLK through hole. An example of an optical signal recording/reproducing apparatus to which the present invention is applied will be described with reference to Figure 6 of 'eXK. (6) indicates a beam generating means, which will be explained below. (7) is a laser beam generation source, which here is a cow conductor laser diode. (8) is the diode (7) that drives this diode (7), which generates a constant current during playback and a pulse current according to the information during recording. We will have a means to vary it so that it becomes small. The laser beam from this diode (7) (
Divergent beam) (sphere 11i11[) is a collimator lens (
After the parallel beam is parallelized by 91, the diffraction grating QIK is irradiated into three beams, namely the O-order refraction beam (main beam LB) and the first order refraction beam (Iris 1 and Proverb 2). Create brain beams LBl.LJ3g) and combine these beams LB, LBt, LB
z is made incident on Trackkinder Zu2 (Galpa 2 Ra) 03 through polarizing beam splitter aυ - wavelength plate α,
A large NA objective lens fi4Hc
Therefore, it is focused and made incident on the recording medium (1) so as to be in focus. Then, as shown in Figure 11411 and Iris 5, the narrow beam LB 1. The beams LB, LBI, and LB2 are scanned on the recording medium (1) so that the IJ32 scans adjacent optical grooves (circular (nearly spiral) circles, and the main beam LB scans the σ] tund part e between them). Select the arrangement relationship of each reflected beam L B + LB from the recording medium (1).
r s Ij Bx No. 1 objective lens α Tracking mirror a To wave A polarized beam split lJ by going backwards through the meridian of plate 0
After entering the ivy Ql and being reflected here, a semi-cylindrical lens (cylindrical lens) (1
5-Detection of the main photodetector and the first and second side photodetectors Dl, Dz through the path of the focusing lens 1G;
#Inject so as to focus on the IC. The photodetectors D, DI, and D2 will now be explained with reference to FIG. There is a main photodetector in the center, and on both sides #C1111 and side photodetectors [)1 and D2 of the irises 2 are arranged. The main photodetector consists of four detection sections on the left, right, top and bottom, and the information reproduction signal is the sum of the IIIL output signals of the 14 detection sections, and the focus g during reproduction is
The +ui signal is obtained from the sum of the detection outputs of the detection units on each diagonal. The focus error signal from the main photodetector is supplied to the current-voltage conversion link via the input terminal (lη), and its output is used to drive the objective lens α4 linear motor via the focus servo amplifier circuit. The voice coil &1jK are supplied to perform focus servo of the objective lens a4 during reproduction.The focus during recording is fixed.In addition, each detection output of 1111 and the second photodetector DI, D2 is manually controlled. Current-to-voltage conversion -1lI (goods), (c) are supplied through circuits (c) and c!3.The outputs of these circuits (c) and (c) are used as a converter or subtractor. A differential amplification of -111 kgaK is supplied.The main beam LB has a strong power during recording, and the power distribution structure (1) metal layer (3)
is melted, and the metal layer (3) is weakly heated during playback. It is not in Ii1. Furthermore, since the power of the inter-beams IJI and LB2 of the irises 1 and 2 is weak, the metal layer (3) is not exposed to the metal layer (3). The output of the road plow is supplied to the totsuking support and the output of the increasing mWA is supplied to the totsukin damper (13 coils). Tracking servo is performed during power distribution and playback. In this case, when tracking is achieved, the output of the differential amplifier path (to) is approximately zero, and if there is tracking deviation, a corresponding error voltage will be generated. is obtained, and the tracking i-to-Q3 is rotated to enable tracking.The main beam LB then scans the recording track T (land layer) correctly, so that the signal is recorded on the land gt. Then, the information signal (for example, data signal) of the recording track T is reproduced from the main photodetector. In this device, the optical groove g can be used as a tracking guide during both recording and reproduction. According to the present invention described above, since the land gK power distribution track is formed between the grooves of an optical recording medium equipped with the jt logical groove, the bit can be formed neatly, and the reproduced signal can be 5, it is possible to obtain an optical signal recording method that can record signals.In this case, it is sufficient to have only one sub beam, and in that case, the detection output of the llIi party detection unit is used as the standard. Compare it with the value and get the tracking error signal.

【図面の簡単な説明】[Brief explanation of the drawing]

菖1図は信号の未記録状態の光学式記録媒体を示す断面
図、IIz図は従来方法により信号の記録された光学式
記録媒体の平面的路線図、菖311はその光学式記録媒
体の断面図、菖4図は本楯明方法により信号の記録され
た光学式記録媒体の平面的略S図、票5!Elはその断
面図、第6図は本発明を適用した光学式信号記録再生装
置の一例を示て配置図、第7図はその光検出器を示す平
面図である。 (1)は光学式記録媒体、(2)は基体、(3)は金属
片、。 (4)は保■層、Tは記録トラック、pはピット、eは
jy)’II、LBit主ビーA、LB 1 、 LB
2 ハIf ヒームである。 第 21ニー<、f 第3図 第41”(1 第5N
Diagram 1 is a cross-sectional view of an optical recording medium in which no signals have been recorded. Diagram IIz is a planar route diagram of an optical recording medium on which signals have been recorded by the conventional method. Iris 311 is a cross-sectional view of the optical recording medium. Figure 4 is a planar schematic S diagram of an optical recording medium on which signals are recorded by the present Tatemei method, vote 5! El is a sectional view thereof, FIG. 6 is a layout diagram showing an example of an optical signal recording/reproducing apparatus to which the present invention is applied, and FIG. 7 is a plan view showing a photodetector thereof. (1) is an optical recording medium, (2) is a substrate, and (3) is a metal piece. (4) is the storage layer, T is the recording track, p is the pit, e is jy)'II, LBit main bee A, LB 1, LB
2 HaIf Heem. 21st knee <, f Fig. 3 No. 41'' (1 5th N

Claims (1)

【特許請求の範囲】[Claims] 配電トツツクに関連した光学的溝の形成された光学式記
録媒体の腋光学的溝をトツツキンダを採りパながら副ビ
ームにて再生すると同時に、腋副ビームと所定位置胸像
にある主ビームにて上記光学的111flaのランド部
にピットの列から成る上記記録トラックを形成すること
を特徴とするt、学式信号記・一方式。
The axillary optical grooves of the optical recording medium in which optical grooves related to the power distribution are formed are reproduced using the sub beam while the optical grooves are being formed while the axillary optical grooves are being played back. t, academic signal recording, one type, characterized in that the recording track consisting of a row of pits is formed on the land portion of the target 111fla.
JP18585781A 1981-11-19 1981-11-19 Optical signal recording system Pending JPS5888838A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18585781A JPS5888838A (en) 1981-11-19 1981-11-19 Optical signal recording system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18585781A JPS5888838A (en) 1981-11-19 1981-11-19 Optical signal recording system

Publications (1)

Publication Number Publication Date
JPS5888838A true JPS5888838A (en) 1983-05-27

Family

ID=16178088

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18585781A Pending JPS5888838A (en) 1981-11-19 1981-11-19 Optical signal recording system

Country Status (1)

Country Link
JP (1) JPS5888838A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2562701A1 (en) * 1984-04-06 1985-10-11 Drexler Tech OPTICAL SYSTEM WITH THREE PRESERVED GUIDED BEAMS FOR READING ON TWO PARALLEL TRACKS
US4769802A (en) * 1984-06-07 1988-09-06 Victor Company Of Japan, Ltd. Information recording medium disc and method and apparatus for recording/reproducing information using the disc
US5070490A (en) * 1986-04-09 1991-12-03 Canon Kabushiki Kaisha Optical recording medium with tracking tracks extending beyond the recording layer and a method for detecting tracking signal from said medium
US6118748A (en) * 1997-10-06 2000-09-12 Fujitsu Limited Optical information storage unit having phase compensation means for applying different phase compensation quantities with respect to signals detected from land and groove of recording medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5534340A (en) * 1978-08-31 1980-03-10 Nippon Hoso Kyokai <Nhk> Recording reproducing system by light beam

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5534340A (en) * 1978-08-31 1980-03-10 Nippon Hoso Kyokai <Nhk> Recording reproducing system by light beam

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2562701A1 (en) * 1984-04-06 1985-10-11 Drexler Tech OPTICAL SYSTEM WITH THREE PRESERVED GUIDED BEAMS FOR READING ON TWO PARALLEL TRACKS
US4769802A (en) * 1984-06-07 1988-09-06 Victor Company Of Japan, Ltd. Information recording medium disc and method and apparatus for recording/reproducing information using the disc
US5070490A (en) * 1986-04-09 1991-12-03 Canon Kabushiki Kaisha Optical recording medium with tracking tracks extending beyond the recording layer and a method for detecting tracking signal from said medium
US6118748A (en) * 1997-10-06 2000-09-12 Fujitsu Limited Optical information storage unit having phase compensation means for applying different phase compensation quantities with respect to signals detected from land and groove of recording medium

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