JPS61242338A - Optical information recording and reproducing device - Google Patents

Optical information recording and reproducing device

Info

Publication number
JPS61242338A
JPS61242338A JP60084111A JP8411185A JPS61242338A JP S61242338 A JPS61242338 A JP S61242338A JP 60084111 A JP60084111 A JP 60084111A JP 8411185 A JP8411185 A JP 8411185A JP S61242338 A JPS61242338 A JP S61242338A
Authority
JP
Japan
Prior art keywords
recording
light beam
intensity
optical
reproduction
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
Application number
JP60084111A
Other languages
Japanese (ja)
Other versions
JPH0727638B2 (en
Inventor
Masahiko Enari
正彦 江成
Akio Aoki
昭夫 青木
Hideki Hosoya
細谷 英樹
Hiroshi Matsuoka
宏 松岡
Kazuhiko Matsuoka
和彦 松岡
Masayuki Usui
臼井 正幸
Kazuo Minoura
一雄 箕浦
Bunro Kawaguchi
川口 文朗
Kenichi Suzuki
健一 鈴木
Satoshi Shikichi
敷地 聡
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP60084111A priority Critical patent/JPH0727638B2/en
Priority to DE3546718A priority patent/DE3546718C2/de
Priority to DE19853546067 priority patent/DE3546067A1/en
Priority to GB08531770A priority patent/GB2172138A/en
Priority to FR858519290A priority patent/FR2580413B1/en
Priority to CA000498689A priority patent/CA1267725A/en
Priority to CH5555/85A priority patent/CH665043A5/en
Publication of JPS61242338A publication Critical patent/JPS61242338A/en
Priority to US07/166,802 priority patent/US4912697A/en
Priority to US07/399,719 priority patent/US5010534A/en
Priority to FR9007160A priority patent/FR2646546B1/en
Publication of JPH0727638B2 publication Critical patent/JPH0727638B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

PURPOSE:To prevent a wrong recording action and to perform an access when an operation is restarted by providing a means to lower the intensity of a light beam in an inactive mode of recording or reproduction. CONSTITUTION:In a recording or reproduction mode both a motor 21 and a stepping motor 28 are driven by the control of a CPU 27. Then a light beam scans a data recording area 3. Here a light beam 32 given from a semiconductor laser 11 always has the power PWL or PR on an optical card 1 and is modulated with the power PWH according to the recording signal supplied from a terminal C1. While the reproduction signal is delivered from a terminal C2 in a reproduction mode. Thus the intensity of the beam is lowered in an inactive state where the beam is set under a static state. This prevents a wrong recording action. Furthermore, the access time can be reduced when an operation is restarted since the tracking control is carried continuously despite reduction of the beam intensity.

Description

【発明の詳細な説明】 〔技術分野〕 本発明は光学的情報記録再生装置に関し、特にカード状
の光学的情報記録媒体に用いる装置に関する。本発明t
こおいて光学的情報記録再生装置とは、前記の如き媒体
ンこ情報を記録する装置、媒体に記録された情報を再生
する装置および記録と再生とを両方共付なう装置を示す
DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an optical information recording/reproducing device, and particularly to a device used for a card-shaped optical information recording medium. The present invention
Here, the optical information recording and reproducing device refers to a device for recording information on a medium, a device for reproducing information recorded on a medium, and a device for both recording and reproducing as described above.

〔従来技術〕[Prior art]

従来、光を用いて情報を記録し、また記録された情報を
続出す媒体の形態としてディスク状、カード状、テープ
状等各種のものが知られている。これらの内、カード状
に形成された光学的記録媒体(以下光カードと称す)は
、小屋・軽量で持ち運びに便利な大記tI!答童の媒体
として、大きな需要が見込まれている。
2. Description of the Related Art Conventionally, various types of media such as disks, cards, tapes, etc. are known as media for recording information using light and for continuously outputting the recorded information. Among these, optical recording media formed in the form of cards (hereinafter referred to as optical cards) are compact, lightweight, and convenient to carry. It is expected to be in great demand as a medium for answering children.

上記の元カードは、記録情報に従って変調され、微小ス
ポットに絞った光ビームで、カード上に予め設定された
記録トラックを走査することによって、光学的に検出可
能な記録ピット列として情報が記録される。この際、記
録ビット列の交叉等のトラブルを生ずる事なく、正確に
情報を記録していく為には、前記元ビームの照射位置を
走査方向と垂直な方向で制御(オートトラツキンク、以
下ATと称す)する必要があった。また、元ビームをカ
ード上に正確に合焦させる為、焦点l1iII御(オー
トフォーカシング、以下AFと称す)も行なわれた。従
って、前記記録トラックからトラッキング信号、フォー
カシング信号を得る為に、前記変調された光ビームは、
最小のレベルにおいてもカード上で書き込みが行なわれ
ない程度の所定のパワーを有するように設定されていた
。また、記録された情報を再生する場合には、光カード
に情報が書き込まれないレベルの一定パワーの光ビーム
で、前述の記録ピット列を走査することによって行なっ
ていた。
In the original card mentioned above, information is recorded as an optically detectable recording pit string by scanning a preset recording track on the card with a light beam that is modulated according to the recorded information and focused on a minute spot. Ru. At this time, in order to accurately record information without causing problems such as crossing of recording bit strings, it is necessary to control the irradiation position of the original beam in a direction perpendicular to the scanning direction (auto tracking, hereinafter referred to as AT). It was necessary to do so. Further, in order to accurately focus the original beam onto the card, focus l1iII control (autofocusing, hereinafter referred to as AF) was performed. Therefore, in order to obtain a tracking signal and a focusing signal from the recording track, the modulated light beam is
It was set to have a predetermined power that would prevent writing on the card even at the minimum level. In addition, when reproducing recorded information, the above-mentioned recorded pit array is scanned with a light beam having a constant power at a level that does not allow information to be written on the optical card.

一方、上記の如き光カードの情報再生手段は、記録又は
再生の動作時に元カードと元ビームとを相対的に移動さ
せることによυ、光ビームの走査を行なっていた。また
、光カード上の記録トラックは複数本の直線状に設けら
れている為、上記走査は間欠的に行なわれ、非動作時に
は光ビー・ムを静止状態で待機させていた。
On the other hand, the information reproducing means of the optical card as described above scans the optical beam by relatively moving the original card and the original beam during recording or reproducing operations. Furthermore, since the recording tracks on the optical card are provided in a plurality of straight lines, the above-mentioned scanning is performed intermittently, and the optical beam is kept stationary during non-operation.

ところが、このような従来の装置において、光ビームの
静止状態が長時間続くと、前述のような書き込みが行な
われないレベルの光ビームにおいても、エネルギーの蓄
積によってWAM号が書き込まれてしまう場合があった
。このような誤信号はやはり光ビームによって検出され
、トラックアクセスなどの際に大きな支障となった。
However, in such conventional devices, if the light beam remains stationary for a long time, the WAM code may be written due to energy accumulation even with the light beam at a level that does not allow writing as described above. there were. Such erroneous signals are still detected by the optical beam, and pose a major problem when accessing a track.

〔発明の概要〕[Summary of the invention]

本発明の目的は、かかる従来装置の欠点を解決し、光ビ
ームの静止時の誤信号の誓き込みを防止し、常に正確な
記録又は再生動作の可能な光学的情報記録再生装置を提
供することにある。
It is an object of the present invention to provide an optical information recording/reproducing apparatus which solves the drawbacks of the conventional apparatus, prevents false signals from being generated when the light beam is stationary, and is capable of always performing accurate recording or reproducing operations. There is a particular thing.

本発明の上記目的は、光学的情報記録再生装置を、カー
ド状の光学的情報記録媒体に光ビームを照射し情報を記
録又は再生する手段と、前記記録又は再生の動作時に前
記媒体と光ビームとを相対的に走査させ、非動作時には
前記ビームを静止状態で待機させる手段と、非動作時に
は動作時より前記媒体上の光ビームの強度を低下させる
手段とから構成することKよって達成される。
The above-mentioned object of the present invention is to provide an optical information recording/reproducing apparatus, a means for recording or reproducing information by irradiating a light beam onto a card-shaped optical information recording medium, and a means for recording or reproducing information between the medium and the light beam during the recording or reproducing operation. This is accomplished by comprising means for scanning the light beam relative to the medium and keeping the beam in a stationary state when not in operation, and means for lowering the intensity of the light beam on the medium when not in operation compared to when it is in operation. .

〔実施例〕〔Example〕

以下、図面を用いて本発明の実施例を詳細に説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.

第2図は、本発明の装置に用いる光カードの一例を示す
概略平面図である。図中、1は光カード、2は元カード
上に複数本の直線状に形成された記録トラック、5は所
定速度で光ビームが走査される記録トラックのデータ記
録エリア、41.42は所望トラックの検索がなされる
トラック選択エリア、5は元ビームのホームポジション
である。光ビームは最初ホームポジション5に静止して
いる。記録又は再生の際には、まず光ビームはトラック
選択エリア4.をa方向に移動し、記録又は再生しよう
とするN番目のトラック2を見つける。そして、光ビー
ムはトラック2上のデータ記録エリア3を矢印C方向に
走資し、記録又は再生を行なう。記録又は再生が終了す
ると、光ビームはトラック選択エリア42内で停止し、
次に記録又は再生を行なうまでの間、静止状態で待機さ
れる。記録又は再生の指令がくると、この光ビームは、
次に記録又は再生すべきトラック(例えばN+1番目の
トラック)に選択エリア4□内を矢印a方向に移動し、
このトラックのデータ記録エリア3を矢印す方向に走査
し、同様に記録又は再生が行なわれる。
FIG. 2 is a schematic plan view showing an example of an optical card used in the apparatus of the present invention. In the figure, 1 is an optical card, 2 is a plurality of recording tracks formed in a straight line on the original card, 5 is a data recording area of the recording track where a light beam is scanned at a predetermined speed, and 41.42 is a desired track. 5 is the track selection area where the search is performed, and 5 is the home position of the original beam. The light beam is initially stationary at home position 5. During recording or playback, the light beam first moves to the track selection area 4. is moved in the a direction to find the Nth track 2 on which recording or reproduction is to be performed. The light beam then travels through the data recording area 3 on the track 2 in the direction of arrow C to perform recording or reproduction. When recording or playback is finished, the light beam stops within the track selection area 42;
It remains stationary until the next recording or playback. When a recording or playback command is received, this light beam
Move in the direction of arrow a within the selection area 4□ to the next track to be recorded or played back (for example, the N+1st track),
The data recording area 3 of this track is scanned in the direction indicated by the arrow, and recording or reproduction is performed in the same manner.

そして、この動作を繰夛返すととKよって、所定量のデ
ータが記録又は再生される。
When this operation is repeated, a predetermined amount of data is recorded or reproduced.

第3図は、記録及び再生時の光ビームの光カード上での
パワーを説明する図で、夫々(勾は記録時、(均は再生
時である。また、図の横軸はトラック上の位置、縦軸唸
光パワーPを示す。記録時に光ビームは俸)のようにデ
ータ記録エリアに対応する走査範囲E、において、記録
ピットが形成されず、またトラッキング信号及びフォー
カシング信号を得る為に必要な最小限のパワーPWLで
常に光カードに照射される。そして、記録信号に応じて
、記録に必要なだけのパワーPWIIとの間で変調され
、パワーFWIl!で照射された部分にのみ記録ピット
が形成される。また、再生時にも走査範囲ERにおいて
記録ピットが形成されない一定パワーPRで光ビームが
照射され、前述の記録ピットが読み取られる。
Figure 3 is a diagram explaining the power of a light beam on an optical card during recording and reproduction. position, the vertical axis shows the optical power P. During recording, the light beam is emitted in the scanning range E, which corresponds to the data recording area, as shown in Fig. The optical card is always irradiated with the minimum necessary power PWL.Then, depending on the recording signal, it is modulated between the power PWII and the power required for recording, and only the portion irradiated with the power FWII! is recorded. A pit is formed.Furthermore, during reproduction, a light beam is irradiated with a constant power PR at which no recorded pit is formed in the scanning range ER, and the aforementioned recorded pit is read.

ここで、通常光カードの記録感度8は、光ビームの照射
パワーPと照射時間Tで決定される。
Here, the recording sensitivity 8 of the normal optical card is determined by the irradiation power P and irradiation time T of the light beam.

従って、第4図のように光ビームのスポットが62から
6.へ相対速度Vで走査される場合、スポット径をΦと
すると、Vが077以上であれば記録されない。ところ
が、前述のように光ビームが静止状態で#模している場
合、この状態が長時間続くと、たとえ元パワーが上記の
如くRWL或いはPRであっても誤記録されてしまう。
Therefore, as shown in FIG. 4, the spot of the light beam is changed from 62 to 6. When scanning is performed at a relative speed V, if the spot diameter is Φ, no recording is made if V is 077 or more. However, when the light beam is #simulating in a stationary state as described above, if this state continues for a long time, erroneous recording will occur even if the original power is RWL or PR as described above.

本発明においては、このような記録、再生の非動作時に
、媒体上の光ビームの強度を低下させるものである。
In the present invention, the intensity of the light beam on the medium is reduced during such non-recording and reproducing operations.

第1図は、本発明に基すく元学的情報記録再匣 丸装置の一実施例を示す概略図である。ここで、1は第
2図の如き光カードで、ベル)20に固定された載置台
17上に載置されている。ベルト24はプーリ19,1
81cかけわたされ、モータ21によって矢印d方向に
移動し、これに伴って、光ガード1もd方向に移動する
。従って、光カード1面においては、光ヘッド16から
照射される光ビーム52は第2図のb或匹はC方向に走
査される。元ヘッド16は、半導体レーザ11、コリメ
ータレンズ12、ビームスグリツタ13、対物し/ズ1
4及び光検出器15とから構成される。前記の光ビーム
32は半導体レーザ11から射出し、対物レンズ14で
光カード1上に微小スポットとして来光される。また、
この光ビーム32の光カードによる反射光は、再び対物
レンズ14を通シ、ビームスプリッタ15で入射光と分
離されて光検出器15で検出される。この光検出器15
で検出された信号は、信号復調回路22、トラッキング
制御回路23、フォーカス制御回路24に送られ、フォ
ーカス制#回路24及びトラッキング制御回路23は、
対物レンズ14t−夫々元軸方向及び光軸と垂直な方向
に動かし、APとムTとを行なう。
FIG. 1 is a schematic diagram showing an embodiment of the scientific information recording and reproducing device based on the present invention. Here, 1 is an optical card as shown in FIG. 2, and is placed on a mounting table 17 fixed to a bell 20. Belt 24 is connected to pulley 19,1
81c, the light guard 1 is moved in the direction of arrow d by the motor 21, and accordingly, the light guard 1 is also moved in the direction of d. Therefore, on the surface of the optical card, the light beam 52 irradiated from the optical head 16 is scanned in the direction b or C in FIG. The original head 16 includes a semiconductor laser 11, a collimator lens 12, a beam sinter 13, an objective lens 1
4 and a photodetector 15. The light beam 32 is emitted from the semiconductor laser 11 and is directed onto the optical card 1 by the objective lens 14 as a minute spot. Also,
The light beam 32 reflected by the optical card passes through the objective lens 14 again, is separated from the incident light by a beam splitter 15, and is detected by a photodetector 15. This photodetector 15
The detected signal is sent to the signal demodulation circuit 22, the tracking control circuit 23, and the focus control circuit 24, and the focus control # circuit 24 and the tracking control circuit 23
The objective lens 14t is moved in the direction of the original axis and in the direction perpendicular to the optical axis to perform AP and T.

28はステッピングモータで、光ヘッド16を紙面垂直
方向に動かし、これKよって!2図a方向に元ビームの
照射位置を移動させる。前記モータ21は、モータ駆動
回路25によって制御され、光カードの移動、停止を行
なう。またモータ21の駆動速度は、速度検知回路29
によって検知され、この速度検知回路29は時間計測回
路50を介して、半導体レーザ11を駆動するレーザ駆
動回路31に接続されている。
28 is a stepping motor that moves the optical head 16 in a direction perpendicular to the plane of the paper. Move the irradiation position of the original beam in the direction a in Figure 2. The motor 21 is controlled by a motor drive circuit 25 to move and stop the optical card. Further, the driving speed of the motor 21 is determined by a speed detection circuit 29.
The speed detection circuit 29 is connected to a laser drive circuit 31 that drives the semiconductor laser 11 via a time measurement circuit 50.

更に、信号復調回路22、ステッピングモータ28、モ
ータ駆動回路25、レーザ駆動回路31は夫々インター
フェイス26ft介して、中央6理装置(C!PU) 
27 K接続されている。
Furthermore, the signal demodulation circuit 22, the stepping motor 28, the motor drive circuit 25, and the laser drive circuit 31 are connected to the central 6-processing unit (C!PU) through an interface 26ft, respectively.
27K connected.

この装置において、記録又は再生の動作を行なう場合に
は、CPU27の制御によって、モータ21およびステ
ッピングモータ28が駆動され、第2図で説明したよう
に元ビームがデータ記録エリア3を走査する。このとき
半導体レーザ11からの光ビーム52は、光カード上で
常に第3図PWL或いはPRのパワーを有し、記録時に
は更に端子C4から入力する記録16号に従ってパフ−
PWEとの間で変調がなされる。また、再生時には端子
C2から再生信号が出力される。
In this apparatus, when performing a recording or reproducing operation, the motor 21 and the stepping motor 28 are driven under the control of the CPU 27, and the original beam scans the data recording area 3 as explained in FIG. At this time, the light beam 52 from the semiconductor laser 11 always has the power of PWL or PR shown in FIG.
Modulation is performed between the PWE and the PWE. Furthermore, during reproduction, a reproduction signal is output from terminal C2.

次に、第1図の装置の記録時における動作を第5図で説
明する。第5図(A)は前述の光カード1の記録面の拡
大図である。データ記録エリア5の記録トラック2 M
 v 2 h++ t・・・の間には、トラッキング信
号を検出する為のトラッキングトラック8と、クロック
信号を得る為のクロックトラック7が交互に形成されて
いる。また、トラック選択エリア4.には、非動作時に
光ビームがトラックからはずれないよりにトラッキング
する為の補助トラック9が形成されている。また、(司
は元カード上の相対位置に対する光ビームと記録面との
相対速度Vの関係を示し、(C) ti先光カード上相
対位fifK対する記録ビームの強度Pの関係を示す。
Next, the operation of the apparatus shown in FIG. 1 during recording will be explained with reference to FIG. FIG. 5(A) is an enlarged view of the recording surface of the optical card 1 described above. Recording track 2 M of data recording area 5
Between v 2 h++ t..., tracking tracks 8 for detecting tracking signals and clock tracks 7 for obtaining clock signals are alternately formed. Also, track selection area 4. An auxiliary track 9 is formed in order to keep the light beam from deviating from the track during non-operation. (C) indicates the relationship between the relative velocity V of the light beam and the recording surface with respect to the relative position on the source card, and (C) indicates the relationship between the intensity P of the recording beam and the relative position fifK on the destination optical card.

第1図の装置において、光と一ム32Vi実際には不図
示の回折格子等により3つのビームに分割され、各々の
ビームによるスポットは第5図(6)のSI & ? 
82 a v S5 a或いはS+ b+ S2b*s
sb或いは5ICeS20ySl(!のように元カード
1上に照射される。
In the apparatus shown in FIG. 1, the light beam 32Vi is actually divided into three beams by a diffraction grating (not shown), and the spot of each beam is SI & ? in FIG. 5 (6).
82 a v S5 a or S+ b+ S2b*s
sb or 5ICeS20ySl (!) is irradiated onto the original card 1.

尚、第5図(A)では便宜上光ビームの強度をスボット
の径で表現している。情報の記録時には、光ビームは(
功のように記録面と一定の速度Vwで走査され、記録ビ
ーム(中央のスポット)で記録がなされる。このとき、
両端のスポットから夫々トラッキング信号及びクロック
信号を検出fる。記録ビームの元カード上の強度はCO
)のようにPvH及びPWLの間で情報に従って変調さ
れている。即ちスポット821LpS2tlは夫々PW
H,。
In addition, in FIG. 5(A), the intensity of the light beam is expressed by the diameter of the sbot for convenience. When recording information, the light beam (
The recording surface is scanned at a constant speed Vw, and recording is performed using the recording beam (center spot). At this time,
A tracking signal and a clock signal are detected from the spots at both ends, respectively. The intensity of the recording beam on the original card is CO
) is modulated according to information between PvH and PWL. That is, spots 821LpS2tl are each PW
H.

’WLの強度に設定される。また、クロック信号、トラ
ッキング信号を得る為のスポットは、信号を得るのに十
分で、且つ、記録がなされないように、中央のスポット
よりも強度が低く設定されている。
'Set to the strength of WL. Further, the intensity of the spot for obtaining the clock signal and the tracking signal is set to be lower than that of the center spot so that it is sufficient to obtain the signal and no recording is performed.

記録が終了するとビームスポットはトラック選択エリア
4.に入シ、第5図(B)のように記録面との相対速度
が低下して、最終的にスポットsIC*521)*S5
゜の位置で静止状態で待機する。この時、第1図の速度
検知口$29は、モータ21よす党ビームと光カードと
の相対速度Vが所定の限界相対速度vLより遅ぐなった
ことを検知し、時間計測回路30を働かせる。ここで時
間計測回路30には、所定の時間Tc(例えば1秒)が
設定されてお夛、前記V<VLとなってからの時1’1
4tが、Tcと等しくなったときには、強度低下信号を
レーザ駆動回路51に送り、半導体レーザ11の注入1
1It流を制御して、スポットB2Qの光カード上の強
度をPBに低下させる。そして、このスポット82cで
トラッキング信号を検出し、作が開始されv>vI、と
なった場合には、速度検知回路29によってスボツ) 
82゜の強度を元通夕に強め、記録を行なり。ここでス
ポット8200強度P8は、トラッキングをとるために
最低限で、しかも、静止状態で長時間記録面に照射され
ても記録が行なわれない強度に設定する。もしt (T
Oの間に、次の動作が開始され、V ) Vpとなれば
、時間計測回路30はリセットされる。
When recording is finished, the beam spot moves to the track selection area 4. As shown in Fig. 5(B), the relative speed with the recording surface decreases, and finally the spot sIC*521)*S5
Stand still at the position of ゜. At this time, the speed detection port $29 in FIG. make it work Here, a predetermined time Tc (for example, 1 second) is set in the time measurement circuit 30, and the time 1'1 after the above-mentioned V<VL is set.
When 4t becomes equal to Tc, an intensity reduction signal is sent to the laser drive circuit 51, and the injection 1 of the semiconductor laser 11 is
1It flow is controlled to reduce the intensity of spot B2Q on the optical card to PB. Then, when a tracking signal is detected at this spot 82c, and when v>vI is established when the work is started, the speed detection circuit 29 detects the tracking signal.
The intensity of 82 degrees was increased to Yuan Tsyu and recorded. Here, the spot 8200 intensity P8 is set to the minimum intensity for tracking, and to an intensity that does not cause recording even if the recording surface is irradiated for a long time in a stationary state. If t (T
During the period O, the next operation is started, and when Vp is reached, the time measuring circuit 30 is reset.

前述の光パワーPWLの静止光ビームで記録がなされる
時間をTBとするとTQはTc (TBに設定されるシ
換えスイッチで段階的に、或いはボリューム等で連続的
に変化可能に構成しても良い。尚、第5図(C)では、
vくvLとなると同時に強度Pが2日となるように描い
ているが、実際には前述の時間計側回路30の働きによ
って、一定時間経過後にP、となる。
If TB is the time during which recording is performed with a stationary light beam of the above-mentioned optical power PWL, then TQ is Tc (even if configured to be variable stepwise with a switch set to TB or continuously with a volume control, etc.) Good. In addition, in Figure 5 (C),
Although it is depicted so that the intensity P reaches 2 days at the same time that the intensity changes to v and vL, in reality, it becomes P after a certain period of time due to the operation of the timer side circuit 30 mentioned above.

以上の説明では、情報を記録する場合を示したが、光カ
ードに記録された情報を再生する場合にも、第5図(0
)において、動作時の強度が一定値PRとなるだけで、
記録時と全く同様の動作が行なわれる。
In the above explanation, the case of recording information was shown, but the case of reproducing information recorded on an optical card can also be explained as shown in FIG.
), if the strength during operation is a constant value PR,
Exactly the same operation as during recording is performed.

前述の実施例において、光ビームの強度の設定例を示す
と、例えば、ビームスポット径が5μm、記録走査相対
速度Vv = 50 mm1B 、再生走査相対速度V
R= 5001jl/S であり、元ビームの強度Pと
書き込み時間Tとの関係を、 P = 5 mWの場合、 Ts=1011148P 
= 1 mWの場合、 Ts=iSP = 0.2 m
Wの場合、T8=■述のスポット82a、 ’2bの強
度を夫々PWH”’ s mW pPWL”in”とす
れば良い。ここで中央のスポットと両端のスポットとの
強度比(回折格子を用いた場合には、比は一定)を5:
1とすると、スポット85&、851)の強度は夫々1
 mW及び0.2 mWとなる。ここで0.2mWは、
トラッキング信号を得る為に十分な強度とする。1 m
Wの光ビームの限界相対速度VL=Q/T8=5μm/
Sであるので、動作時Kti vw(或イt:I1. 
VR)> MLとなッテ、 1 mw以下の光ビームで
は記録はなされない。また、前述のTQを1秒とし、P
s ’fc O,2mWに設定すれは補助トラック9に
スポットS2cで記録がなされる前に、このスボツ) 
E+2゜の強度が0.2mWに低下し、誤まって書き込
まれることがない。Pawl mWとすれば、再生時も
全く同様である。
In the above embodiment, an example of setting the intensity of the light beam is, for example, the beam spot diameter is 5 μm, the recording scanning relative velocity Vv = 50 mm1B, and the reproduction scanning relative velocity V
R = 5001jl/S, and the relationship between the intensity P of the original beam and the writing time T is, when P = 5 mW, Ts = 1011148P
= 1 mW, Ts=iSP = 0.2 m
In the case of W, the intensity of the spots 82a and '2b described above should be set to PWH"' s mW pPWL"in", respectively. Here, the intensity ratio of the center spot and the spots at both ends (using a diffraction grating) (if the ratio is constant) 5:
1, the intensity of spots 85&, 851) is 1 respectively.
mW and 0.2 mW. Here, 0.2mW is
The intensity should be sufficient to obtain a tracking signal. 1 m
Limit relative velocity of light beam of W VL=Q/T8=5μm/
Since Kti vw (alternatively t: I1.
VR) > ML, recording is not possible with a light beam of 1 mW or less. In addition, the above TQ is set to 1 second, and P
s 'fc O, set to 2mW (this slot) before recording is made on the auxiliary track 9 at spot S2c)
The intensity at E+2° is reduced to 0.2 mW and no accidental writing occurs. If Pawl mW is used, the same holds true during playback.

このように、本発明によれば元ビームが静止状態となる
非動作時には元ビームの強度を低下させるので、誤って
記録が行なわれることがなした時のアクセス時間を短縮
出来る。
As described above, according to the present invention, the intensity of the original beam is reduced during non-operation when the original beam is in a stationary state, so that the access time in the event of erroneous recording can be shortened.

本発明は、前述の実施例に限らす櫨々の変形が可能であ
る。例えば、実施例では光ビームの走査速度をモータか
ら直接検知したが、光カードの動作を制御するapσか
らの信号に従って計時を開始するように構成しても良い
。また光検出器から読み出される信号によって速波検知
を行なってもかまわない。更に、時間計測回路を用いず
に、V<VLとなると同時に光ビームの強で 度を低下させるように構成しへも良い。
The present invention is not limited to the above-described embodiments, and can be modified in various ways. For example, in the embodiment, the scanning speed of the light beam is directly detected from the motor, but it may be configured to start time measurement in accordance with a signal from apσ that controls the operation of the optical card. Alternatively, fast wave detection may be performed using a signal read out from a photodetector. Furthermore, without using a time measurement circuit, the power may be reduced by the intensity of the light beam as soon as V<VL.

また、トラッキング信号を得る為に最低限の強度の光ビ
ームであっても、長時間(例えば1時間)の静止状態で
記録がなされる場会には、非動作時に一旦光ビームの強
度を低下させ、更に1時間、次のアクセスが再開しなか
ったら、光ビームの照射を停止するようにしても良い。
In addition, even if the light beam has the minimum intensity to obtain a tracking signal, if recording is to be done in a stationary state for a long period of time (for example, one hour), the intensity of the light beam should be temporarily lowered during non-operation. If the next access does not resume for another hour, the light beam irradiation may be stopped.

本発明は、前述のような記録及び再生を行なう装置だけ
でなく、記録専用装置、再生専用装ff1Kも適用が可
能である。
The present invention can be applied not only to the above-described recording and reproducing apparatus, but also to a recording-only device and a reproducing-only device ff1K.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明の光学的情報記録再生装置
は、記録又は再生の非動作時に光ビームの強度を低下さ
せる手段を設けたので、誤って記録がなされないように
し、且つ、動作が再開されたときには、速やかにアクセ
スが行なえる効果を有する。また、非動作時の長時間に
亘る高出力な発光がなくなるので、半導体レーザ等の光
源の長寿命化、消費゛電力の省力化にもつながる。更に
、本発明は、惨敗等によって元ビームの走査が停止して
しまった時にも、誤記録を防ぐ効果を有する。
As explained above, the optical information recording and reproducing apparatus of the present invention is provided with a means for reducing the intensity of the light beam when recording or reproducing is not in operation, thereby preventing erroneous recording and preventing operation. When resumed, it has the effect of allowing access to be performed quickly. Furthermore, since high-power light emission for a long period of time during non-operation is eliminated, the life of a light source such as a semiconductor laser can be extended, and power consumption can be reduced. Furthermore, the present invention has the effect of preventing erroneous recording even when scanning of the original beam is stopped due to a disaster or the like.

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

第1図は本発明の光学的情報記録再生装置の一実施例を
示す概略構成図、第2図は不発明の装置tc用いる元カ
ードの一例を示す概略平面図、第5図(A) 、 (E
)は夫々記録時及び再生時の光カード上の光パワーを説
明する図、第4図は元カード上で光ビームのスポットが
走査される様子を示す模式図、第5図は第1図示の装置
の動作を説明する図で、夫々GA)は元カードの記録面
の平面図、(E)は元ビームの位置と速度の関係を示す
図、(0)は光ビームの位置と強度との関係を示す図で
ある。 1・・・光カード 11 ・・・半導体レーザ 21  ・・°モータ 29・・・速度検知回路 30・・・時間計測回路 51 ・・・レーザ駆動回路 第5図 ロロロロ口口ロロヒ7
FIG. 1 is a schematic configuration diagram showing an embodiment of the optical information recording/reproducing device of the present invention, FIG. 2 is a schematic plan view showing an example of an original card used in the device tc of the invention, and FIG. 5(A), (E
) are diagrams explaining the optical power on the optical card during recording and playback, respectively, Figure 4 is a schematic diagram showing how the spot of the light beam is scanned on the original card, and Figure 5 is the same as that shown in Figure 1. GA) is a plan view of the recording surface of the original card, (E) is a diagram showing the relationship between the position and speed of the original beam, and (0) is a diagram illustrating the relationship between the position and intensity of the light beam. It is a figure showing a relationship. 1...Optical card 11...Semiconductor laser 21...°Motor 29...Speed detection circuit 30...Time measurement circuit 51...Laser drive circuit

Claims (1)

【特許請求の範囲】[Claims] (1)カード状の光学的情報記録媒体に光ビームを照射
し情報を記録又は再生する手段と、前記記録又は再生の
動作時に前記媒体と光ビームとを相対的に走査させ、非
動作時には前記ビームを静止状態で待機させる手段と、
非動作時には動作時より前記媒体上の光ビームの強度を
低下させる手段とから成る光学的情報記録再生装置。
(1) A means for recording or reproducing information by irradiating a light beam onto a card-shaped optical information recording medium; and scanning the medium and the light beam relative to each other during the recording or reproducing operation; means for keeping the beam stationary;
an optical information recording/reproducing apparatus comprising means for lowering the intensity of the light beam on the medium when not in operation than when in operation.
JP60084111A 1984-12-29 1985-04-19 Optical information recording / reproducing method Expired - Fee Related JPH0727638B2 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
JP60084111A JPH0727638B2 (en) 1985-04-19 1985-04-19 Optical information recording / reproducing method
DE3546718A DE3546718C2 (en) 1984-12-29 1985-12-24
DE19853546067 DE3546067A1 (en) 1984-12-29 1985-12-24 RECORDING / PLAYBACK DEVICE FOR OPTICAL INFORMATION
GB08531770A GB2172138A (en) 1984-12-29 1985-12-24 Optical recording-reproducing apparatus
CA000498689A CA1267725A (en) 1984-12-29 1985-12-27 Optical information recording-reproducing apparatus and method
FR858519290A FR2580413B1 (en) 1984-12-29 1985-12-27 OPTICAL INFORMATION RECORDING-REPRODUCING APPARATUS
CH5555/85A CH665043A5 (en) 1984-12-29 1985-12-30 APPARATUS FOR RECORDING AND REPRODUCING OPTICAL INFORMATION.
US07/166,802 US4912697A (en) 1984-12-29 1988-03-03 Apparatus and method for preventing recording errors due to a reduction in the relative speed between an information carrying light beam and a recording medium
US07/399,719 US5010534A (en) 1984-12-29 1989-08-29 Optical information recording-reproducing apparatus
FR9007160A FR2646546B1 (en) 1984-12-29 1990-06-08 METHOD FOR OPTICALLY RECORDING AND / OR REPRODUCING INFORMATION ON A CARD-LIKE MEDIUM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60084111A JPH0727638B2 (en) 1985-04-19 1985-04-19 Optical information recording / reproducing method

Publications (2)

Publication Number Publication Date
JPS61242338A true JPS61242338A (en) 1986-10-28
JPH0727638B2 JPH0727638B2 (en) 1995-03-29

Family

ID=13821410

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60084111A Expired - Fee Related JPH0727638B2 (en) 1984-12-29 1985-04-19 Optical information recording / reproducing method

Country Status (1)

Country Link
JP (1) JPH0727638B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02101643A (en) * 1988-10-07 1990-04-13 Canon Inc Optical information recording and reproducing device
JPH03290834A (en) * 1990-04-09 1991-12-20 Nippon Conlux Co Ltd Driving method for laser diode for optical card recording /reproducing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5267302A (en) * 1975-12-01 1977-06-03 Matsushita Electric Ind Co Ltd Optical recording and reproduction device
JPS5940376A (en) * 1982-08-31 1984-03-06 Toshiba Corp Disk record reproducer
JPS6050637A (en) * 1983-08-29 1985-03-20 Hitachi Ltd Optical disc device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5267302A (en) * 1975-12-01 1977-06-03 Matsushita Electric Ind Co Ltd Optical recording and reproduction device
JPS5940376A (en) * 1982-08-31 1984-03-06 Toshiba Corp Disk record reproducer
JPS6050637A (en) * 1983-08-29 1985-03-20 Hitachi Ltd Optical disc device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02101643A (en) * 1988-10-07 1990-04-13 Canon Inc Optical information recording and reproducing device
JP2710961B2 (en) * 1988-10-07 1998-02-10 キヤノン株式会社 Optical information recording / reproducing device
JPH03290834A (en) * 1990-04-09 1991-12-20 Nippon Conlux Co Ltd Driving method for laser diode for optical card recording /reproducing device

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