ATE142364T1 - Ausleseverfahren für ein magnetooptisches aufzeichnungsmedium - Google Patents
Ausleseverfahren für ein magnetooptisches aufzeichnungsmediumInfo
- Publication number
- ATE142364T1 ATE142364T1 AT91122119T AT91122119T ATE142364T1 AT E142364 T1 ATE142364 T1 AT E142364T1 AT 91122119 T AT91122119 T AT 91122119T AT 91122119 T AT91122119 T AT 91122119T AT E142364 T1 ATE142364 T1 AT E142364T1
- Authority
- AT
- Austria
- Prior art keywords
- reproducing
- layer
- recording medium
- region
- magnetic field
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
- G11B11/10515—Reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
- G11B11/10523—Initialising
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2418110A JP2969963B2 (ja) | 1990-12-28 | 1990-12-28 | 光磁気記録媒体における信号再生方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE142364T1 true ATE142364T1 (de) | 1996-09-15 |
Family
ID=18526050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT91122119T ATE142364T1 (de) | 1990-12-28 | 1991-12-23 | Ausleseverfahren für ein magnetooptisches aufzeichnungsmedium |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0492581B1 (de) |
JP (1) | JP2969963B2 (de) |
KR (1) | KR100238874B1 (de) |
AT (1) | ATE142364T1 (de) |
CA (1) | CA2058173C (de) |
DE (1) | DE69121866T2 (de) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2060547C (en) * | 1991-02-08 | 2002-04-23 | Masumi Ohta | System and method of reproducing signals recorded on a magneto-optic recording medium |
CA2060549C (en) * | 1991-02-08 | 2002-08-13 | Masumi Ohta | Magneto-optical recording medium |
DE69231042T2 (de) * | 1991-02-08 | 2000-09-28 | Sony Corp | Magnetooptisches Aufzeichnungs- und/oder -wiedergabegerät |
JP2959588B2 (ja) * | 1991-02-14 | 1999-10-06 | ソニー株式会社 | 光磁気ディスク及びそのセクタ管理情報の記録方法ならびに再生方法 |
WO1992015091A1 (en) * | 1991-02-15 | 1992-09-03 | Sony Corporation | Optically recording medium |
EP0525191B1 (de) * | 1991-02-15 | 1998-04-22 | Sony Corporation | OPTISCHES Wiedergabeverfahren und -vorrichtung |
JPH06236587A (ja) * | 1992-05-19 | 1994-08-23 | Nikon Corp | 再生専用型の光磁気ディスク、その再生方法 及び再生装置 |
US5831944A (en) | 1993-02-26 | 1998-11-03 | Canon Kabushiki Kaisha | Magnetooptical recording medium and method for reproducing information from a magnetooptical recording medium having three layers |
USRE38501E1 (en) | 1992-08-28 | 2004-04-20 | Canon Kabushiki Kaisha | Magnetooptical recording medium and information recording and reproducing methods using the recording medium |
DE69331924T2 (de) * | 1992-08-28 | 2002-10-10 | Canon Kk | Magnetooptisches Aufzeichnungsmedium und Informationsaufzeichungs- und Wiedergabeverfahren damit |
JP2999895B2 (ja) * | 1992-12-10 | 2000-01-17 | シャープ株式会社 | 光磁気記録媒体 |
JP2857002B2 (ja) * | 1993-01-07 | 1999-02-10 | シャープ株式会社 | 光磁気記憶装置 |
EP0686970A3 (de) * | 1994-06-10 | 1996-07-24 | Canon Kk | Magneto-optisches Aufzeichnungsmedium und Wiedergabemethode dafür |
JP2766198B2 (ja) * | 1994-09-05 | 1998-06-18 | 富士通株式会社 | 光磁気記録媒体 |
JP3049482B2 (ja) * | 1995-06-09 | 2000-06-05 | 富士通株式会社 | 光磁気記録媒体及びその再生方法 |
JP3245704B2 (ja) * | 1996-10-18 | 2002-01-15 | 富士通株式会社 | 光磁気記録媒体及びその製造方法 |
JPH10134429A (ja) * | 1996-10-25 | 1998-05-22 | Fujitsu Ltd | 光磁気記録媒体及びその再生方法 |
US6252845B1 (en) | 1997-08-05 | 2001-06-26 | Matsushita Electric Industrial Co., Ltd. | High density optical disk, apparatus for reproducing optical disk and method for producing optical disk master |
JP3538727B2 (ja) | 1997-10-01 | 2004-06-14 | 富士通株式会社 | 光磁気記録媒体 |
US6770387B2 (en) | 2000-10-26 | 2004-08-03 | Fujitsu Limited | Magneto-optical recording medium and method of reproducing the same |
US6767656B2 (en) | 2000-10-26 | 2004-07-27 | Fujitsu Limited | Magneto-optical recording medium and method of reproducing the same |
JP2003233937A (ja) | 2002-02-06 | 2003-08-22 | Sony Corp | 光学記録再生方法及び光記録媒体 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62137754A (ja) * | 1985-12-09 | 1987-06-20 | Canon Inc | 光磁気再生方法 |
EP0318925B1 (de) * | 1987-11-30 | 1994-04-20 | Sony Corporation | Methode zum optischen Abtasten eines Signals aus einem magneto-optischen Speichermedium |
US5168482A (en) * | 1989-08-31 | 1992-12-01 | Sony Corporation | Magnetooptical recording and playback method employing multi-layer recording medium with record holding layer and playback layer |
-
1990
- 1990-12-28 JP JP2418110A patent/JP2969963B2/ja not_active Expired - Lifetime
-
1991
- 1991-11-18 KR KR1019910020466A patent/KR100238874B1/ko not_active IP Right Cessation
- 1991-12-20 CA CA002058173A patent/CA2058173C/en not_active Expired - Lifetime
- 1991-12-23 EP EP91122119A patent/EP0492581B1/de not_active Expired - Lifetime
- 1991-12-23 AT AT91122119T patent/ATE142364T1/de not_active IP Right Cessation
- 1991-12-23 DE DE69121866T patent/DE69121866T2/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2058173A1 (en) | 1992-06-29 |
DE69121866T2 (de) | 1997-04-03 |
EP0492581A2 (de) | 1992-07-01 |
KR920013298A (ko) | 1992-07-28 |
EP0492581B1 (de) | 1996-09-04 |
CA2058173C (en) | 2001-05-29 |
JP2969963B2 (ja) | 1999-11-02 |
DE69121866D1 (de) | 1996-10-10 |
JPH04271039A (ja) | 1992-09-28 |
EP0492581A3 (en) | 1992-08-05 |
KR100238874B1 (ko) | 2000-01-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
UEP | Publication of translation of european patent specification | ||
EELA | Cancelled due to lapse of time |