JPS6383923A - Optical information recording and reproducing device - Google Patents
Optical information recording and reproducing deviceInfo
- Publication number
- JPS6383923A JPS6383923A JP61229005A JP22900586A JPS6383923A JP S6383923 A JPS6383923 A JP S6383923A JP 61229005 A JP61229005 A JP 61229005A JP 22900586 A JP22900586 A JP 22900586A JP S6383923 A JPS6383923 A JP S6383923A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- high frequency
- frequency component
- optical disk
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 94
- 239000000463 material Substances 0.000 claims abstract description 33
- 238000011109 contamination Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 14
- 239000000428 dust Substances 0.000 abstract description 8
- 239000000843 powder Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は光ディスクに情報を記録再生する光情報記録再
生装置に係り、特に光ディスクの汚れを検出出来るよう
にした光情報記録再生装置に関す、るものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an optical information recording/reproducing apparatus for recording and reproducing information on an optical disc, and more particularly to an optical information recording/reproducing apparatus capable of detecting dirt on an optical disc. It is.
従来の技術
光ディスクに情報を記録する光情報記録再生装置ハ、レ
ーザ光の高収束性とトラックの狭ピッチとによって磁気
ディスクの１０倍以上の高記録密度が得られる。Conventional technology Optical information recording and reproducing apparatuses for recording information on optical disks can achieve a high recording density more than 10 times that of magnetic disks due to the high convergence of laser light and the narrow pitch of tracks.
特に、追記型光ディスクや磁気光学光ディスクは再生専
用のビデオディスクやコンパクトディスクと異なって情
報の記録再生１さらには書き換えが可能な点で注目され
る。第４図は従来の光情報記録再生装置の構成図を示す
ものであり、１は情報を記録する光ディスクである。２
はモータで光ディスク１を回転させる。３は光ヘッドで
、光ディスク１にレーザ光を収束して信号を記録し、記
録された情報を収束レーザ光の反射光の変化として読み
出す。４は光ヘッド３のレーザドライブ部とフォーカス
誤差信号１ｏＯ、トラッキング誤差信号１０１と再生信
号１０２を検出するヘッドアンプ部からなるレーザドラ
イブ・ヘッドアンプ回路である。６は光ヘッド３のアク
チュエータを駆動して収束レーザ光を光ディスク１０案
内トラツクにフォーカスさせるフォーカス制御回路であ
る。In particular, write-once optical discs and magneto-optical discs are attracting attention because, unlike read-only video discs and compact discs, information can be recorded, reproduced, and even rewritten. FIG. 4 shows a configuration diagram of a conventional optical information recording/reproducing apparatus, in which 1 is an optical disk on which information is recorded. 2
rotates the optical disc 1 with a motor. Reference numeral 3 denotes an optical head that converges a laser beam onto the optical disk 1 to record a signal, and reads out the recorded information as a change in reflected light of the convergent laser beam. Reference numeral 4 denotes a laser drive/head amplifier circuit consisting of a laser drive section of the optical head 3 and a head amplifier section that detects a focus error signal 1oO, a tracking error signal 101, and a reproduction signal 102. A focus control circuit 6 drives the actuator of the optical head 3 to focus the convergent laser beam onto the guide track of the optical disk 10.
６は光ヘッド３のアクチュエータを駆動して収束レーザ
光を光ディスク１の案内トラックに追従させるトラッキ
ング制御回路である。７は入力データ１０３をディジタ
ル変調し１再生信号１０２を復調し、出力データ１０５
を出力するデータ変調・復調回路である。８は装置のシ
ステム制御を行なう制御用ＣＰＵである。A tracking control circuit 6 drives the actuator of the optical head 3 to cause the focused laser beam to follow the guide track of the optical disk 1. 7 digitally modulates the input data 103, demodulates the 1 reproduced signal 102, and outputs the output data 105.
This is a data modulation/demodulation circuit that outputs . 8 is a control CPU that performs system control of the device.
以上のように構成された従来の光情報記録再生装置にお
いては、定速で回転する光ディスク１の案内トラックに
光ヘッド３から出射されるレーザ光を集光し１ トラッ
クを追従させる。光ヘッド３で検出されたフォーカス誤
差信号１００とトラッキング誤差信号１０１はそれぞれ
フォーカス制御回路６．トラッキング制御回路６に入力
され光ヘッド３のアクチュエータを駆動することによっ
てフォーカス制御とトラッキング制御をかけて案内トラ
ックにフォーカスしたレーザ光を照射する。In the conventional optical information recording/reproducing apparatus configured as described above, the laser beam emitted from the optical head 3 is focused on the guide track of the optical disk 1 rotating at a constant speed, and is caused to follow one track. A focus error signal 100 and a tracking error signal 101 detected by the optical head 3 are respectively sent to a focus control circuit 6. The laser beam is inputted to the tracking control circuit 6 and drives the actuator of the optical head 3 to apply focus control and tracking control to irradiate the guide track with a focused laser beam.
データの記録は、入力データ１０３をデータ変調復調回
路子で変調し、記録可能な強度のレーザ光を変調データ
１０４で変調して光ディスク１に照射しておこなう。To record data, input data 103 is modulated by a data modulation/demodulation circuit, and the optical disc 1 is irradiated with a laser beam having a recordable intensity that is modulated by the modulation data 104.
データの再生は、記録されないレベルの微弱なレーザ光
を光ディスク１に照射し、収束レーザ光の反射光量を受
光した再生信号１０２をデータ変調復調回路７で復調し
、出力データＩＱ５を出力する。To reproduce data, the optical disk 1 is irradiated with a weak laser beam at a level that cannot be recorded, and the reproduced signal 102 received by the reflected light amount of the convergent laser beam is demodulated by the data modulation/demodulation circuit 7, and output data IQ5 is output.
通常、再生パワーは１！ＩＩＷぐらい、記録パワーは６
〜１ＱｍＷである。Normally, the regeneration power is 1! About IIW, recording power is 6
~1QmW.
発明が解決しようとする問題点
しかしながら上記のような構成では、光ディスク１が１
８ＱＱｒｐｍぐらいで高速回転しているため長時間連続
使用したとき、電気的に絶縁物である樹脂やガラスを基
材とする光ディスク１は帯ｔして１その表面に空気中の
塵埃を吸着する。吸着された塵埃はレーザ光を吸収した
り、散乱して数１０％もの減衰を生じる。このため案内
トラックに蒸着された光感応性部材の記録層で記録レー
ザパワーは１例えば５〜１０ｍＷ必要なものが３〜ｅｓ
ｍｗと大幅に不足してしまい、信号記録が良好に行なえ
ない。Problems to be Solved by the Invention However, in the above configuration, the optical disc 1 is
Since it rotates at a high speed of about 8QQrpm, when used continuously for a long time, the optical disk 1, which is made of electrically insulating resin or glass as a base material, becomes tapered and attracts dust in the air to its surface. The adsorbed dust absorbs or scatters the laser beam, causing an attenuation of several tens of percent. For this reason, in the recording layer of the photosensitive material deposited on the guide track, the recording laser power is 1, for example, 5 to 10 mW, whereas the recording layer is 3 to es.
mw, which is significantly insufficient, and signal recording cannot be performed well.
このことは１再生信号の振幅の減少とそれに伴うビット
エラー率の悪化、さらには記録ビットが飽和点まで記録
されていないため環境変化で記録ピントが劣化して寿命
が短かくなるといった問題点を有していた。This leads to problems such as a decrease in the amplitude of the reproduced signal and an accompanying worsening of the bit error rate, and furthermore, because the recording bits are not recorded to the saturation point, the recording focus deteriorates due to environmental changes and the lifespan is shortened. had.
問題点を解決するための手段
本発明はレーザ光源からのレーザビームを光ディスクに
集光する光学手段と、前記集光されたレーザビームを光
ディスクの案内トラックにフォーカスする第１のフォー
カス手段と、集光されたレーザビームを光ディスク基材
の表面にフォーカスする第２のフォーカス手段と、光デ
ィスク基材の表面に集光されたレーザビームの反射光か
ら基準値以上の高周波成分を検出する高周波成分検出手
段を備えた光情報記録再生装置である。Means for Solving the Problems The present invention provides an optical means for focusing a laser beam from a laser light source onto an optical disk, a first focusing means for focusing the focused laser beam on a guide track of the optical disk, and a first focusing means for focusing the focused laser beam on a guide track of the optical disk. a second focusing means for focusing the emitted laser beam on the surface of the optical disc base material; and a high frequency component detection means for detecting a high frequency component higher than a reference value from the reflected light of the laser beam focused on the surface of the optical disc base material. This is an optical information recording and reproducing device equipped with.
作用
本発明は前記した構成により、光ディスク基材の表面に
光ヘッドからのレーザ光をフォーカスして光ディスク基
材の表面からの反射光の高周波成分を抽出し、その出力
レベルで光ディスクの表面の汚れを検出して基準値以上
の高周波成分が有ると光ディスクへの信号記録を防止す
る。According to the above-described configuration, the present invention focuses the laser beam from the optical head on the surface of the optical disc base material, extracts the high frequency component of the reflected light from the surface of the optical disc base material, and uses the output level to remove dirt on the surface of the optical disc. is detected and if there is a high frequency component higher than a reference value, recording of the signal on the optical disc is prevented.
実施例
第１図は本発明の実施例における光情報記録再生装置の
構成図を示すものである。第１図において、１から４，
６から８および１ｏｏから１０６は第４図の同一の番号
と同じものである。９は光ディスク１の案内トラックの
記録層に光ヘッド３のレーザビームを集光するだめの第
１のフォーカス制御回路、１０は光ディスク１０基材表
面に光ヘッド３のレーザビームを集光するための第２の
フォーカス制御回路、１１は第２のフォーカス制御回路
１ｏによって光ディスク１の基材表面にレーザビームを
集光したときの反射光の高周波成分を検出するだめの高
周波成分検出回路である。Embodiment FIG. 1 shows a configuration diagram of an optical information recording/reproducing apparatus in an embodiment of the present invention. In Figure 1, 1 to 4,
6 to 8 and 1oo to 106 are the same as the same numbers in FIG. 9 is a first focus control circuit for focusing the laser beam of the optical head 3 on the recording layer of the guide track of the optical disc 1; 10 is for focusing the laser beam of the optical head 3 on the surface of the base material of the optical disc 10; The second focus control circuit 11 is a high frequency component detection circuit that detects the high frequency component of reflected light when the laser beam is focused on the base material surface of the optical disc 1 by the second focus control circuit 1o.
以上のように構成された本実施例の光情報記録再生装置
について、以下その動作を説明する。The operation of the optical information recording/reproducing apparatus of this embodiment configured as described above will be described below.
光ディスク１がモータ２に装着されると、制御用ＣＰＵ
５は第２のフォーカス制御回路１ｏに指令１０６を出力
して光ヘッド３のレーザビームを光ディスク１の基材表
面に集光せしめる。光ディスク１の基材表面に照射され
たレーザビームは、光ディスク１の基材表面で反射され
て光ヘッド３に返ってきてレーザドライブ・ヘッドアン
プ回路４で増幅され、反射光信号１０７として高周波成
分検出回路１１に入力される。反射光信号１０７は１高
周波成分検出回路１１でその高周波成分が抽出されて、
抽出された高周波成分の振幅が基準電圧と比較される。When the optical disc 1 is attached to the motor 2, the control CPU
5 outputs a command 106 to the second focus control circuit 1o to focus the laser beam of the optical head 3 onto the surface of the base material of the optical disc 1. The laser beam irradiated onto the surface of the base material of the optical disc 1 is reflected by the surface of the base material of the optical disc 1, returns to the optical head 3, is amplified by the laser drive/head amplifier circuit 4, and detects a high frequency component as a reflected optical signal 107. It is input to the circuit 11. A high frequency component of the reflected light signal 107 is extracted by a high frequency component detection circuit 11.
The amplitude of the extracted high frequency component is compared with a reference voltage.
もし、光ディスク１の基材表面が微小なホコリ等で汚れ
ていれば基材表面に照射された光ヘッド３のレーザビー
ムの反射光には高周波成分が現われてくる。その高周波
成分がある基準値以上になると、汚れ検出信号１０８が
イネーブル状態となる。汚れ検出信号１０Ｂは制御用ｃ
ｐｔｒｓで読み取られ、イネーブル状態が検出されると
この光ディスクへの変調データ１０４の記録を禁止し、
このことをエラー信号１０９としてホスト側に通知する
。If the surface of the base material of the optical disk 1 is dirty with minute dust, etc., a high frequency component will appear in the reflected light of the laser beam of the optical head 3 irradiated onto the surface of the base material. When the high frequency component exceeds a certain reference value, the dirt detection signal 108 becomes enabled. Dirt detection signal 10B is for control
ptrs, and when an enable state is detected, recording of the modulated data 104 on this optical disk is prohibited,
This is notified to the host side as an error signal 109.
汚れ検出信号１０Ｂがディセーブル状態ならば。If dirt detection signal 10B is disabled.
制御用ＣＰＵ５は以降のデータ記録を実行するために第
２のフォーカス制御回路１ｏの指令１０６をオフし１次
に第１のフォーカス制御回路９を指令１１ｏで起動する
。第１のフォーカス制御回路９は、光ヘッド３のレーザ
ビームを光ディスク１の案内トラックの記録層に集光せ
しめ、光ディスク１へのデータの記録あるいは、光ディ
スク１からのデータの再生を可能にする。これらのデー
タ記録、データ再生は第３図で詳述したのとおなじであ
るので省略する。In order to execute subsequent data recording, the control CPU 5 turns off the command 106 of the second focus control circuit 1o, and first activates the first focus control circuit 9 with the command 11o. The first focus control circuit 9 focuses the laser beam of the optical head 3 onto the recording layer of the guide track of the optical disc 1, thereby making it possible to record data on the optical disc 1 or reproduce data from the optical disc 1. These data recording and data reproducing operations are the same as those described in detail in FIG. 3, and will therefore be omitted.
第２図は光ディスク１の基材表面にレーザビームを集光
した場合のその反射光信号を示すものである。人は光デ
ィスク１の基材の汚れのない場合。FIG. 2 shows a reflected optical signal when a laser beam is focused on the surface of the base material of the optical disc 1. As shown in FIG. When the base material of the optical disc 1 is clean.
Ｂは基材の汚れのある場合を示す。第２図人においては
、高周波成分はほとんど存在しないが、第２図已におい
ては、基材表面の微小なホコリ等によって反射光が散乱
され、高周波成分が増大する結果となる。レーザビーム
は汚れのある基材表面に集光しているため、反射光の汚
れの有無による差異は数倍と十分大きく１確実に識別可
能となる。B shows the case where the base material is stained. In the human body shown in Figure 2, there is almost no high frequency component, but in the case of Figure 2, the reflected light is scattered by minute dust etc. on the surface of the base material, resulting in an increase in the high frequency component. Since the laser beam is focused on the dirty base material surface, the difference in reflected light depending on the presence or absence of dirt is several times large enough to be reliably identified.
しかし、第１のフォーカス制御回路９を作動させて案内
トラックに集光させたときの反射光量の汚れによる差異
は、高々数１０％と識別に余裕が少なく信頼性が劣る。However, when the first focus control circuit 9 is activated and the light is focused on the guide track, the difference in the amount of reflected light due to dirt is at most several 10%, which leaves little margin for identification and is poor in reliability.
第３図は第１図における高周波成分検出回路１１の一構
成例を示すものである。光ディスク１の基材表面に集光
されたレーザビームの反射光１０７はバイパスフィルタ
１２によって反射光の高周波成分だけが抽出され、第２
図Ｂに示すようにその振幅が比較器１３で正及び負方向
の基準電圧１１ｏ及び１１１と比較される。比較器１３
の出力は計数回路１４でカウントされて、基準電圧を越
えるような高周波成分がある一定値以上になると汚れ検
出信号１０８が出力される。ブた、計数回路は計時回路
であってもよく、この場合はある期間内で基準電圧を越
える時間のトータルによって汚れ検出の判断がなされる
。FIG. 3 shows an example of the configuration of the high frequency component detection circuit 11 in FIG. 1. The reflected light 107 of the laser beam focused on the surface of the base material of the optical disc 1 is filtered by a bypass filter 12, in which only the high frequency component of the reflected light is extracted.
As shown in FIG. B, the amplitude is compared with positive and negative reference voltages 11o and 111 by a comparator 13. Comparator 13
The output of is counted by a counting circuit 14, and when a high frequency component exceeding a reference voltage exceeds a certain value, a dirt detection signal 108 is output. However, the counting circuit may be a clock circuit, in which case contamination detection is determined based on the total time during which the reference voltage is exceeded within a certain period.
以上のように本実施例によれば、光ディスクの基材表面
に光ヘッドのレーザビームを集光するフォーカス制御回
路１ｏと基材表面からの反射光の高周波成分を検出する
高周波成分検出回路１１を設けることにより、ポリカー
ボネートやＰＭＭ人などの樹脂あるいはガラスなどの電
気的に絶縁体である、いわゆる誘電体の基材からなる光
ディスクに、回転によって空気と基材の表面の摩擦で帯
電した電荷が空気中に浮遊する塵埃を吸着した汚れを検
出し、記録レーザパワー不足によるトラプルを防止する
ことができる。As described above, according to this embodiment, the focus control circuit 1o that focuses the laser beam of the optical head on the surface of the base material of the optical disk and the high frequency component detection circuit 11 that detects the high frequency component of the reflected light from the surface of the base material are provided. By providing an optical disc made of a so-called dielectric base material, which is an electrically insulating material such as resin such as polycarbonate or PMM, or glass, electric charges generated by friction between the air and the surface of the base material due to rotation are transferred to the air. It is possible to detect dirt that has attracted dust floating inside and prevent troubles due to insufficient recording laser power.
また１基材の帯電は空気と基材との摩擦で生じるから周
速度のより速いディスク外周部で塵埃の吸着量が多くな
るため、上記の基材表面での反射光量の検出はディスク
外周部で行なうのがよい。Furthermore, since the charging of one base material is caused by the friction between the air and the base material, the amount of dust adsorbed is greater at the outer periphery of the disk where the circumferential speed is faster. It is better to do it.
発明の詳細
な説明したように１本発明によれば、光ディスクの基材
の表面に付いた塵埃などによる汚れを検出することがで
き、その実用的効果は大きい。DETAILED DESCRIPTION OF THE INVENTION As described in detail, according to the present invention, it is possible to detect dirt caused by dust or the like on the surface of the base material of an optical disc, and its practical effects are great.
第１図は本発明の一実施例の光情報記録再生装置の構成
図、第２図は同実施例−の光ディスク基材表面からの反
射光を示す波形図、第３図は高周波成分検出回路の一構
成図、第４図は従来の光情報記録再生装置の構成図であ
る。
１・・・・・・光ディスク、２・山・・モータ、３・・
・・・・光ヘッド、４・・・・・・レーザドライブ・ヘ
ッドアンプ回路、６・・・・・・フォーカス制御回路、
６・・・・・・トラッキング制御回路、７・・・・・・
データ変調・復調回路、８・・・・・・制御用ＣＰＵ、
９・・・・・・第１のフォーカス制御回路、１０・・・
・・・第２のフォーカス制御回路、１１・・・・・・高
周波成分検出回路、１２・・・・・・バイパスフィルタ
、１３・・・・・・比較器、１４・・・・・・計数回路
、１ｏ７・・・・・・反射光信号、１０８・・・・・・
汚れ検出信号。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図
第３図
第４図FIG. 1 is a block diagram of an optical information recording/reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a waveform diagram showing reflected light from the surface of an optical disc base material of the same embodiment, and FIG. 3 is a high frequency component detection circuit. FIG. 4 is a block diagram of a conventional optical information recording/reproducing apparatus. 1...Optical disc, 2...Motor, 3...
... Optical head, 4 ... Laser drive head amplifier circuit, 6 ... Focus control circuit,
6... Tracking control circuit, 7...
Data modulation/demodulation circuit, 8... control CPU,
9...first focus control circuit, 10...
... Second focus control circuit, 11 ... High frequency component detection circuit, 12 ... Bypass filter, 13 ... Comparator, 14 ... Counter Circuit, 1o7...Reflected light signal, 108...
Dirt detection signal. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4
Claims (4)
からのレーザビームを集光する光学手段と、前記集光さ
れたレーザビームを前記案内トラックに集光する第１の
フォーカス手段と、前記集光されたレーザビームを前記
光ディスク基材の表面に集光する第２のフォーカス手段
と、前記光ディスク基材の表面に集光されたレーザビー
ムの反射光から基準値以上の高周波成分を検出する高周
波成分検出手段とを有し、前記高周波成分検出手段の出
力レベルで光ディスクの表面の汚れを検出することを特
徴とする光情報記録再生装置。(1) an optical means for focusing a laser beam from a laser light source on an optical disk on which a guide track is formed; a first focusing means for focusing the focused laser beam on the guide track; a second focusing means for focusing a laser beam focused on the surface of the optical disc base material; and a high frequency component detection for detecting a high frequency component higher than a reference value from the reflected light of the laser beam focused on the surface of the optical disc base material. 1. An optical information recording/reproducing apparatus comprising means for detecting contamination on the surface of an optical disc based on the output level of said high frequency component detecting means.
とき起動されることを特徴とする特許請求の範囲第１項
記載の光情報記録再生装置。(2) The optical information recording and reproducing apparatus according to claim 1, wherein the second focusing means is activated when the optical disc is converted.
起動されることを特徴とする特許請求の範囲第１項記載
の光情報記録再生装置。(3) The optical information recording and reproducing apparatus according to claim 1, wherein the second focusing means is activated at the outermost circumference of the optical disc.
分を検出した時は、光ディスクへの記録を禁止すること
を特徴とする特許請求の範囲第１項記載の光情報記録再
生装置。(4) The optical information recording and reproducing apparatus according to claim 1, wherein when the high frequency component detecting means detects a high frequency component exceeding a certain reference value, recording on the optical disc is prohibited.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61229005A JPS6383923A (en) | 1986-09-26 | 1986-09-26 | Optical information recording and reproducing device |
| US07/094,899 US4789974A (en) | 1986-09-16 | 1987-09-10 | Optical information recording/reproducing apparatus |
| EP87113400A EP0260637B1 (en) | 1986-09-16 | 1987-09-14 | Optical information recording/reproducing apparatus |
| KR1019870010163A KR910002321B1 (en) | 1986-09-16 | 1987-09-14 | Optical information recording/reproducing apparatus |
| DE8787113400T DE3781227T2 (en) | 1986-09-16 | 1987-09-14 | DEVICE FOR RECORDING / PLAYING BACK OPTICAL DATA. |
| DE3751969T DE3751969T2 (en) | 1986-09-16 | 1987-09-14 | Device for recording / reproducing optical data |
| EP91115575A EP0464871B1 (en) | 1986-09-16 | 1987-09-14 | Optical information recording/reproducing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61229005A JPS6383923A (en) | 1986-09-26 | 1986-09-26 | Optical information recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6383923A true JPS6383923A (en) | 1988-04-14 |
Family
ID=16885265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61229005A Pending JPS6383923A (en) | 1986-09-16 | 1986-09-26 | Optical information recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6383923A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6398170B1 (en) | 1999-01-22 | 2002-06-04 | Sumitomo Wiring Systems, Ltd. | Wire harness fixing clip |
| WO2009063604A1 (en) * | 2007-11-12 | 2009-05-22 | Panasonic Corporation | Optical disk device |
-
1986
- 1986-09-26 JP JP61229005A patent/JPS6383923A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6398170B1 (en) | 1999-01-22 | 2002-06-04 | Sumitomo Wiring Systems, Ltd. | Wire harness fixing clip |
| WO2009063604A1 (en) * | 2007-11-12 | 2009-05-22 | Panasonic Corporation | Optical disk device |
| US8174943B2 (en) | 2007-11-12 | 2012-05-08 | Panasonic Corporation | Optical disk device |
| JP5406033B2 (en) * | 2007-11-12 | 2014-02-05 | パナソニック株式会社 | Optical disk device |
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