JPH03222126A - Optical disk device - Google Patents

Optical disk device

Info

Publication number
JPH03222126A
JPH03222126A JP1710190A JP1710190A JPH03222126A JP H03222126 A JPH03222126 A JP H03222126A JP 1710190 A JP1710190 A JP 1710190A JP 1710190 A JP1710190 A JP 1710190A JP H03222126 A JPH03222126 A JP H03222126A
Authority
JP
Japan
Prior art keywords
lens
sensor
mirror
reflected
optical
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
JP1710190A
Other languages
Japanese (ja)
Inventor
Shiro Ichikawa
市川　志朗
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.)
NEC Gunma Ltd
Original Assignee
NEC Gunma Ltd
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 NEC Gunma Ltd filed Critical NEC Gunma Ltd
Priority to JP1710190A priority Critical patent/JPH03222126A/en
Publication of JPH03222126A publication Critical patent/JPH03222126A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Head (AREA)

Abstract

PURPOSE:To record information with high reliability in a short time for processing data by providing a disk rotating device which rotates two disk media coaxially arranged at some intervals and an optical head arranged between the optical disk media. CONSTITUTION:One of two-divided light sources is reflected by a mirror 281 and supplied to a 1st objective lens 21. At the same time, the other light source is reflected by mirrors 282 and 283 respectively and supplied to a 2nd objective lens 24. The light projected by the lens 21 is reflected by the surface of the optical disk medium 1 and enters a sensor 291 again via the lens 21 and the mirror 281 and a half mirror 272. An actuator 22 for driving the lens 21 is controlled by forming a servo loop of focusing and tracking error signals obtained by a sensor 291. The light projected from the lens 24 is reflected by the surface of the medium 1' and enters the sensor 292 again via the lens 24, the mirror 283 and the half mirror 273. An actuator 23 for driving the lens 24 is controlled with the signal of the sensor 292.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、光ディスク媒体に情報を記録再生する光ディ
スク装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disc device for recording and reproducing information on an optical disc medium.

〔従来の技術〕[Conventional technology]

従来、光ディスク装置では、１枚の光ディスク媒体を１
つの光学ヘッドによって情報の記録再生を行っていた。Conventionally, in optical disk devices, one optical disk medium is
Information was recorded and reproduced using two optical heads.

また、高い信頼性の確保が必要がデータは、２ケ所に例
えば内側と外側に同じ情報を二重に記録していたが、こ
の場合には光学ヘッドを２ケ所に渡って駆動して記録し
ていた。In addition, data that needs to be highly reliable is recorded twice in two locations, for example, on the inside and outside, but in this case, the optical head is driven across the two locations to record the data. was.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来の光ディスク装置では、高い信頼性が必要
なデータを二重に記録する場合は、１枚の光ディスク媒
体上に２ケ所に記録する為、情報の記録のたびに、光学
ヘッドを駆動させる必要があり、データの処理時間が長
くなってしまう欠点があった。In the conventional optical disk device described above, when data that requires high reliability is recorded in duplicate, it is recorded in two locations on one optical disk medium, so the optical head must be driven each time information is recorded. This has the disadvantage that the data processing time becomes long.

〔課題を解決するための手段〕[Means to solve the problem]

本発明の光ディスク装置は、２枚の光ディスク媒体を同
軸に間隔をあけて配置して回転させるディスク回転手段
と、前記２枚の光ディスク媒体の中間に位置し前記２枚
の光ディスク媒体それぞれに対し対物レンズおよびアク
チュエータならびにセンサーを有する光学ヘッドとを有
している。The optical disc device of the present invention includes a disc rotating means for rotating two optical disc media coaxially spaced apart from each other, and an objective located between the two optical disc media for each of the two optical disc media. and an optical head having a lens, an actuator, and a sensor.

〔実施例〕〔Example〕

次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第１図は本発明の一実施例の光ディスク装置を示す構成
図である。本実施例の光ディスク装置は、同軸、に間隔
をあけて配置される２枚の光ディスク媒体１及び１′と
、光ディスク媒体１，１′を回転させるスピンドルモー
タ３と、２枚の光ディスク媒体１，１′に対応する第１
の対物レンズ２１及び第１のアクチュエータ２２、第２
の対物レンズ２４及び第２のアクチュエータ２３とを有
する光学ヘッド２とによって構成されている。FIG. 1 is a block diagram showing an optical disc device according to an embodiment of the present invention. The optical disc device of this embodiment includes two optical disc media 1 and 1' arranged coaxially and spaced apart, a spindle motor 3 for rotating the optical disc media 1 and 1', and two optical disc media 1 and 1'. The first corresponding to 1′
objective lens 21 and the first actuator 22, the second
The optical head 2 includes an objective lens 24 and a second actuator 23.

光学ヘッド２は第２図に示すように１つのレーザー光源
２５と、レーザー光を平行光にするコリメートレンズ２
６と、この平行光を２系統に分配するハーフミラ−２７
１を有する。２分された一方の光源はミラー２８１で反
射されて第１の対物レンズ２１に供給される。また同時
に他方の光源はミラー２８２．ミラー２８３でそれぞれ
反射されて第２の対物レンズ２４に供給される。As shown in FIG. 2, the optical head 2 includes one laser light source 25 and a collimating lens 2 that converts the laser light into parallel light.
6, and a half mirror 27 that distributes this parallel light into two systems.
1. One of the two divided light sources is reflected by a mirror 281 and supplied to the first objective lens 21 . At the same time, the other light source is mirror 282. The light is reflected by a mirror 283 and supplied to the second objective lens 24 .

第１の対物レンズ２１より出射された光は媒体１の面よ
り反射されて再び第１の対物レンズ２１１　ミラー２８
１およびハーフミラ−２７２を経由して第１のセンサ２
９１に入る。第１の対物レンズ２１を駆動する第１のア
クチュエータ２２は第１のセンサー２９１より得られる
フォーカス及びトラッキングエラー信号よりサーボルー
プが形成されて制御される。The light emitted from the first objective lens 21 is reflected from the surface of the medium 1 and returns to the first objective lens 211 mirror 28
1 and the first sensor 2 via the half mirror 272.
Enter 91. The first actuator 22 that drives the first objective lens 21 is controlled by forming a servo loop based on focus and tracking error signals obtained from the first sensor 291.

同様に第２の対物レンズ２４より出射された光は媒体１
′の面より反射されて再び第２の対物レンズ２４．ミラ
ー２８３．およびハーフミラ−２７３を経由して第２の
センサ２９２に入る。第２の対物レンズ２４を駆動する
第２のアクチュエータ２３は、第２のセンサ２９２より
得られるフォーカス及びトラッキングエラー信号により
サーボループが形成されて制御される。したがって１つ
の光源により２つのレンズがそれぞれ独立に制御される
。Similarly, the light emitted from the second objective lens 24 is transmitted to the medium 1.
' is reflected from the surface of the second objective lens 24. Mirror 283. and enters the second sensor 292 via the half mirror 273. The second actuator 23 that drives the second objective lens 24 is controlled by forming a servo loop using focus and tracking error signals obtained from the second sensor 292. Therefore, two lenses are independently controlled by one light source.

第１の対物レンズ２１．第１のアクチュエータ２２、第
１のセンサー２９１からなる第１の系または第２の対物
レンズ２４．第２のアクチュエータ２３．第２のセンサ
ー２９２からなる第２の系のいずれかあるいはその両方
を使用して２枚の光ディスク１，１′のいずれか一方を
選択的に、あるいは双方の光ディスクの同一カ所に一時
に記録再生することができる。First objective lens 21. A first system consisting of a first actuator 22 and a first sensor 291 or a second objective lens 24. Second actuator 23. Either or both of the second system consisting of the second sensor 292 is used to selectively record or reproduce information on either one of the two optical disks 1, 1' or on the same location on both optical disks at the same time. can do.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明の光−ディスク装置は、２枚
のディスク媒体を同軸に間隔をあけて配置して回転させ
るディスク回転手段と、前記光ディスク媒体の中間に配
置された光学ヘッドを備えることにより、上下２枚の光
ディスク媒体にそれぞれ同時に記録することができる為
、短いデータ処理時間で信頼性の高い情報の記録を行う
ことができる。As explained above, the optical disc device of the present invention includes a disc rotating means for rotating two disc media coaxially spaced apart from each other, and an optical head disposed between the optical disc media. As a result, it is possible to simultaneously record information on the upper and lower two optical disc media, and therefore highly reliable information can be recorded in a short data processing time.

データの再生時においては、第１および第２のディスク
に対して１回のアクセスで目的のデータトラックを見出
すことができ第１のディスク側で再生エラーが生じた時
には瞬時に第２のディスク側に切り換えることができヘ
ッドのアクセス動作を伴なわずにバックアップデータを
再生出来るので処理スピードの向上になる。また、２枚
のディスク媒体相互間でのデータ処理が短時間で連続し
て行える。When reproducing data, the target data track can be found with one access to the first and second disks, and if a playback error occurs on the first disk, the data track can be immediately accessed on the second disk. Since backup data can be played back without head access operations, processing speed can be improved. Further, data processing between two disk media can be performed continuously in a short period of time.

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

第１図は本発明の一実施例の光ディスク装置を示す構成
図、第２図は第１図に示す光学ヘッド２を示す構成図で
ある。 １．１′・・・光ディスク媒体、２・：・光学ヘッド、
３・・・スピンドルモータ、２１．２４・・・対物レン
ズ、２２．２３・・・アクチュエータ、２５・・・レー
ザー光源、２６・・・コリメートレンズ、２７１゜２７
２．２７３・・・ハーフミラ−２８１，２８２゜２８３
・・・ミラー　２９１，２９２・・・センサ。FIG. 1 is a block diagram showing an optical disk device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing an optical head 2 shown in FIG. 1. 1.1': Optical disk medium, 2: Optical head,
3...Spindle motor, 21.24...Objective lens, 22.23...Actuator, 25...Laser light source, 26...Collimating lens, 271°27
2.273...half mirror-281,282°283
...Mirror 291,292...Sensor.

Claims (1)

【特許請求の範囲】[Claims] 　２枚の光ディスク媒体を同軸に間隔をあけて配置して
回転させるディスク回転手段と、前記２枚の光ディスク
媒体の中間に位置し前記２枚の光ディスク媒体それぞれ
に対し対物レンズおよびアクチュエータならびにセンサ
ーを有する光学ヘッドとを含むことを特徴とする光ディ
スク装置。A disc rotating means for rotating two optical disc media coaxially spaced apart from each other, and an objective lens, an actuator, and a sensor located between the two optical disc media for each of the two optical disc media. An optical disc device comprising an optical head.
JP1710190A 1990-01-25 1990-01-25 Optical disk device Pending JPH03222126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1710190A JPH03222126A (en) 1990-01-25 1990-01-25 Optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1710190A JPH03222126A (en) 1990-01-25 1990-01-25 Optical disk device

Publications (1)

Publication Number Publication Date
JPH03222126A true JPH03222126A (en) 1991-10-01

Family

ID=11934623

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1710190A Pending JPH03222126A (en) 1990-01-25 1990-01-25 Optical disk device

Country Status (1)

Country Link
JP (1) JPH03222126A (en)

Similar Documents

Publication Publication Date Title
JP3221100B2 (en) optical disk
JPH06202820A (en) Record of information item that rom -ram memory medium is used and method and equipment for refreshing it
US5138598A (en) Optical disk having relatively wide ram tracks and relatively narrow rom tracks
KR880002145A (en) Disc recorder
JPS5841446A (en) Optical information tracking system
CA2005341A1 (en) Recording and/or reproduction apparatus of an optical disc
JPH076492A (en) Data recording and reproducing device
JPH03222126A (en) Optical disk device
JP2626136B2 (en) Optical recording / reproducing method and apparatus
JPS6330701B2 (en)
JPS59125727U (en) Optical information pickup device
JPH0234089B2 (en) MOKUHYOTORATSUKUICHIKENSAKUSOCHI
JPS6095745A (en) Disc and apparatus of plural recording faces
JPH04121840A (en) Optical disk device
JPH0734172B2 (en) Optical disk device
JPH04332940A (en) Recording medium and optical recording/reproducing device
JPH04172629A (en) Optical disc unit
JP2743545B2 (en) recoding media
JP2546271B2 (en) Disk recording / reproducing device
JPH0636323A (en) Optical disk and optical disk device
JPH01130375A (en) Optical information recording and reproducing device
JPS61273750A (en) Automatic focus controller
JPS61224153A (en) Optical head
JPS59112466A (en) Target track retrieving device of video disk
JPH02183430A (en) Optical head