DE69331926T2 - Magnetooptischer Aufzeichungsträger, Aufzeichnungs- und Wiedergabemethode sowie für diesen magnetooptischen Aufzeichnungsträger entworfener optischer Abtastkopf - Google Patents
Magnetooptischer Aufzeichungsträger, Aufzeichnungs- und Wiedergabemethode sowie für diesen magnetooptischen Aufzeichnungsträger entworfener optischer AbtastkopfInfo
- Publication number
- DE69331926T2 DE69331926T2 DE69331926T DE69331926T DE69331926T2 DE 69331926 T2 DE69331926 T2 DE 69331926T2 DE 69331926 T DE69331926 T DE 69331926T DE 69331926 T DE69331926 T DE 69331926T DE 69331926 T2 DE69331926 T2 DE 69331926T2
- Authority
- DE
- Germany
- Prior art keywords
- magneto
- recording medium
- optical
- optical recording
- reproducing method
- 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.)
- Expired - Lifetime
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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
-
- 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
- G11B11/10504—Recording
- G11B11/10506—Recording by modulating only the light beam of the transducer
-
- 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
- G11B11/10517—Overwriting or erasing
-
- 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
- G11B11/10532—Heads
- G11B11/10541—Heads for reproducing
- G11B11/10543—Heads for reproducing using optical beam of radiation
-
- 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
- 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
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/00718—Groove and land recording, i.e. user data recorded both in the grooves and on the lands
-
- 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
-
- 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
- G11B11/10595—Control of operating function
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/90—Magnetic feature
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4297423A JPH06150418A (ja) | 1992-11-06 | 1992-11-06 | 光磁気記録媒体および記録再生方法 |
JP5001372A JP3071591B2 (ja) | 1993-01-07 | 1993-01-07 | 光磁気記録媒体の再生方法および光磁気再生装置 |
JP945993A JP2914544B2 (ja) | 1993-01-22 | 1993-01-22 | 光磁気記憶素子 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69331926D1 DE69331926D1 (de) | 2002-06-20 |
DE69331926T2 true DE69331926T2 (de) | 2002-11-28 |
Family
ID=27274901
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69331926T Expired - Lifetime DE69331926T2 (de) | 1992-11-06 | 1993-11-03 | Magnetooptischer Aufzeichungsträger, Aufzeichnungs- und Wiedergabemethode sowie für diesen magnetooptischen Aufzeichnungsträger entworfener optischer Abtastkopf |
DE69332846T Expired - Lifetime DE69332846T2 (de) | 1992-11-06 | 1993-11-03 | Magnetooptischer Aufzeichnungsträger und Verfahren zur Aufzeichnung und Wiedergabe und für den magnetooptischen Aufzeichnungsträger ausgebildetes optische Kopf |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69332846T Expired - Lifetime DE69332846T2 (de) | 1992-11-06 | 1993-11-03 | Magnetooptischer Aufzeichnungsträger und Verfahren zur Aufzeichnung und Wiedergabe und für den magnetooptischen Aufzeichnungsträger ausgebildetes optische Kopf |
Country Status (4)
Country | Link |
---|---|
US (2) | US6261707B1 (de) |
EP (2) | EP0974961B1 (de) |
KR (1) | KR100211472B1 (de) |
DE (2) | DE69331926T2 (de) |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
JP2809991B2 (ja) | 1994-01-14 | 1998-10-15 | 富士通株式会社 | 光磁気記録媒体及び該媒体に記録された情報の再生方法 |
USRE38643E1 (en) * | 1994-01-19 | 2004-11-02 | Kabushiki Kaisha Toshiba | Optical disk having specified track pitch, and optical disk apparatus |
DE19535994C2 (de) * | 1994-10-14 | 1998-07-16 | Sharp Kk | Magnetooptisches Aufzeichnungsmedium und Herstellverfahren für dieses |
DE19536796B4 (de) * | 1994-10-19 | 2005-11-24 | Sharp K.K. | Magnetooptisches Aufzeichnungsmedium |
JP3429877B2 (ja) * | 1994-12-27 | 2003-07-28 | シャープ株式会社 | 光磁気記録媒体およびその再生方法並びに記録方法 |
EP0740296A3 (de) * | 1995-04-26 | 1998-02-25 | Sanyo Electric Co. Ltd | Magnetooptische Aufzeichnungsmedium |
JP3554083B2 (ja) * | 1995-07-18 | 2004-08-11 | キヤノン株式会社 | 光磁気記録媒体及び該媒体の情報記録方法 |
US5968678A (en) * | 1995-08-31 | 1999-10-19 | Sanyo Electric., Ltd. | Magneto-optical recording medium and manufacturing method thereof |
JPH09120595A (ja) * | 1995-10-23 | 1997-05-06 | Sharp Corp | 光磁気記録媒体 |
US6407979B1 (en) | 1995-12-05 | 2002-06-18 | Nikon Corporation | High density optical disk and a method for manufacturing same |
JPH09180276A (ja) * | 1995-12-25 | 1997-07-11 | Sharp Corp | 光磁気記録媒体およびその再生方法 |
JPH09237441A (ja) * | 1996-02-29 | 1997-09-09 | Nikon Corp | 光ディスク及びその記録再生方法 |
JP3539531B2 (ja) * | 1996-04-22 | 2004-07-07 | シャープ株式会社 | 光磁気記録媒体 |
JP3781823B2 (ja) * | 1996-05-27 | 2006-05-31 | シャープ株式会社 | 光磁気記録媒体及びその再生方法 |
JP3545133B2 (ja) | 1996-07-23 | 2004-07-21 | シャープ株式会社 | 光磁気記録媒体の再生方法及び光磁気記録媒体 |
JP3400251B2 (ja) * | 1996-07-30 | 2003-04-28 | シャープ株式会社 | 光磁気記録媒体の再生方法及び光磁気記録媒体 |
JP3660072B2 (ja) * | 1996-09-26 | 2005-06-15 | シャープ株式会社 | 光磁気記録媒体及びその記録方法並びに光磁気記録装置 |
JPH10124948A (ja) * | 1996-10-18 | 1998-05-15 | Mitsubishi Chem Corp | 光磁気記録媒体 |
JP2924841B2 (ja) * | 1997-02-27 | 1999-07-26 | 日本電気株式会社 | 光学情報記録装置および光記録媒体および光記録媒体のトラッキング極性の判別方法 |
US6456586B1 (en) * | 1998-09-10 | 2002-09-24 | Sharp Kabushiki Kaisha | Magneto-optical recording medium and process for producing the same |
JP3474464B2 (ja) * | 1998-10-29 | 2003-12-08 | シャープ株式会社 | 光磁気記録媒体 |
JP3477384B2 (ja) | 1998-11-27 | 2003-12-10 | シャープ株式会社 | 光磁気記録媒体 |
US6519211B1 (en) * | 1999-04-01 | 2003-02-11 | Matsushita Electric Industrial Co., Ltd. | Magneto-optical recording medium having magnetic domain shrinks and disappears |
US6665242B2 (en) * | 1999-12-02 | 2003-12-16 | Canon Kabushiki Kaisha | Optical information reproducing apparatus having circuit for adjusting reproducing power |
JP2002025138A (ja) * | 2000-07-13 | 2002-01-25 | National Institute Of Advanced Industrial & Technology | 光記録媒体および光記録再生装置 |
US20040076083A1 (en) * | 2001-04-19 | 2004-04-22 | Koichiro Nishikawa | Magneto-optical record medium |
JP2002352484A (ja) * | 2001-05-25 | 2002-12-06 | Fujitsu Ltd | 光磁気記録媒体 |
JP2003123203A (ja) * | 2001-10-04 | 2003-04-25 | Fuji Photo Film Co Ltd | 情報記録方法 |
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 |
US9348000B1 (en) | 2012-12-20 | 2016-05-24 | Seagate Technology Llc | Magneto optic kerr effect magnetometer for ultra-high anisotropy magnetic measurements |
Family Cites Families (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6079702A (ja) * | 1983-10-06 | 1985-05-07 | Kokusai Denshin Denwa Co Ltd <Kdd> | 光磁気記録媒体 |
JPH0756691B2 (ja) * | 1983-11-07 | 1995-06-14 | 大同特殊鋼株式会社 | 磁性薄膜記録媒体 |
JPS60191449A (ja) * | 1984-03-09 | 1985-09-28 | Canon Inc | 光学的記録媒体 |
JPH0632997B2 (ja) * | 1984-12-30 | 1994-05-02 | 昭和情報機器株式会社 | 多色掲示シ−トの作成方法 |
JPS62204455A (ja) * | 1986-03-03 | 1987-09-09 | Seiko Epson Corp | 光記録媒体 |
JPS62222454A (ja) | 1986-03-24 | 1987-09-30 | Seiko Epson Corp | 光記録媒体 |
JPS62285254A (ja) * | 1986-06-04 | 1987-12-11 | Konica Corp | 光磁気記録媒体 |
DE3752222T2 (de) | 1986-07-08 | 1999-03-25 | Canon Kk | Magnetoptisches Aufzeichnungsmedium mit der Möglichkeit des Überschreibens mit zwei oder mehr Magnetschichten und dieses Medium verwendende Aufzeichnungsmethode |
JPS6318546A (ja) * | 1986-07-11 | 1988-01-26 | Hitachi Ltd | 光磁気記録媒体 |
JPS6370939A (ja) * | 1986-09-12 | 1988-03-31 | Matsushita Electric Ind Co Ltd | 光学式情報記録部材 |
JPS6391848A (ja) * | 1986-10-07 | 1988-04-22 | Fujitsu Ltd | 光磁気デイスク及びその製法 |
US4849304A (en) * | 1986-12-17 | 1989-07-18 | Tdk Corporation | Optical recording medium |
JP2547768B2 (ja) | 1987-05-19 | 1996-10-23 | キヤノン株式会社 | 光学的磁気記録媒体 |
JPS6421733A (en) * | 1987-07-17 | 1989-01-25 | Fuji Electric Co Ltd | Magneto-optical recording medium |
JPS6464150A (en) * | 1987-09-03 | 1989-03-10 | Matsushita Electric Ind Co Ltd | Magneto-optical recording medium |
JPS6464151A (en) * | 1987-09-04 | 1989-03-10 | Seiko Epson Corp | Magneto-optical recording medium |
KR910006659B1 (ko) * | 1987-10-29 | 1991-08-30 | 미쓰이 세끼유 가가꾸 고오교오 가부시끼가이샤 | 자기광학 기록매체 |
JPH01189039A (ja) | 1988-01-22 | 1989-07-28 | Mitsubishi Electric Corp | 光学式情報記録担体 |
NL8801327A (nl) * | 1988-05-24 | 1989-12-18 | Philips Nv | Methode voor het optisch aftasten van een informatievlak en optische registratiedragers en aftastinrichtingen geschikt voor toepassing van de methode. |
JPH01319143A (ja) * | 1988-06-20 | 1989-12-25 | Ricoh Co Ltd | 光磁気記録媒体 |
CA1326547C (en) | 1988-07-13 | 1994-01-25 | Masahiko Kaneko | Thermomagnetic recording method |
JPH0233741A (ja) * | 1988-07-22 | 1990-02-02 | Nec Corp | 光記憶体およびその製造方法 |
JP2807470B2 (ja) | 1988-08-22 | 1998-10-08 | シャープ株式会社 | 光メモリ素子 |
JP2551118B2 (ja) * | 1988-09-14 | 1996-11-06 | 富士通株式会社 | 光磁気ディスク媒体およびその製造方法 |
US5175714A (en) * | 1988-09-30 | 1992-12-29 | Kabushiki Kaisha Toshiba | Method of magneto-optically recording/erasing information and magneto-optical information storage medium including recording and bias layers satisfying certain conditions |
JP2558365B2 (ja) * | 1988-12-27 | 1996-11-27 | キヤノン株式会社 | 光磁気記録媒体 |
JPH03263637A (ja) * | 1990-03-12 | 1991-11-25 | Fujitsu Ltd | 光磁気ディスクの記録再生方法及び光磁気ディスク装置 |
JPH03295047A (ja) * | 1990-04-12 | 1991-12-26 | Nikon Corp | プラスチック基板を有するオーバーライト可能な光磁気記録媒体 |
JPH0413253A (ja) | 1990-05-02 | 1992-01-17 | Sharp Corp | 光磁気メモリ素子及びその作製方法 |
JPH0414645A (ja) * | 1990-05-08 | 1992-01-20 | Sekisui Chem Co Ltd | 光情報記録媒体 |
JPH0490154A (ja) * | 1990-08-03 | 1992-03-24 | Mitsui Petrochem Ind Ltd | 光磁気記録媒体 |
JPH04106742A (ja) * | 1990-08-27 | 1992-04-08 | Shin Etsu Chem Co Ltd | 光磁気記録媒体 |
JP2567996B2 (ja) * | 1991-01-23 | 1996-12-25 | インターナショナル・ビジネス・マシーンズ・コーポレイション | 光磁気記録方法及び装置 |
JP2839783B2 (ja) | 1991-04-17 | 1998-12-16 | シャープ株式会社 | 光磁気記録媒体、再生装置及び再生方法 |
JPH056590A (ja) * | 1991-06-28 | 1993-01-14 | Toshiba Corp | 光磁気記録装置 |
JP2812817B2 (ja) * | 1991-07-08 | 1998-10-22 | シャープ株式会社 | 光磁気記録媒体 |
US5838646A (en) * | 1991-09-11 | 1998-11-17 | Sony Corporation | Optical disk having a protective layer of specified thickness relative to the numerical aperture of the objective lens |
JPH05205336A (ja) | 1991-11-29 | 1993-08-13 | Matsushita Electric Ind Co Ltd | 光磁気記録媒体及び再生装置並びにそれを用いた記録再生方法 |
EP0565751A1 (de) * | 1992-04-14 | 1993-10-20 | Pioneer Electronic Corporation | Optisches Aufzeichnungsverfahren und Gerät dafür |
JP3186217B2 (ja) | 1992-06-09 | 2001-07-11 | 富士通株式会社 | 光磁気記録媒体および該媒体を用いた記録および再生方法 |
JPH06124500A (ja) | 1992-08-28 | 1994-05-06 | Canon Inc | 光磁気記録媒体及び該媒体の再生方法 |
JPH0676405A (ja) | 1992-08-28 | 1994-03-18 | Canon Inc | 光磁気記録媒体及び該媒体の記録方法 |
DE69331924T2 (de) | 1992-08-28 | 2002-10-10 | Canon Kk | Magnetooptisches Aufzeichnungsmedium und Informationsaufzeichungs- und Wiedergabeverfahren damit |
JP2938284B2 (ja) | 1992-10-06 | 1999-08-23 | シャープ株式会社 | 光磁気記録媒体及びこれを用いた記録再生方法 |
JP2857002B2 (ja) * | 1993-01-07 | 1999-02-10 | シャープ株式会社 | 光磁気記憶装置 |
US5662988A (en) * | 1993-01-22 | 1997-09-02 | Sharp Kabushiki Kaisha | Magneto-optical recording medium |
JP3177395B2 (ja) * | 1995-01-31 | 2001-06-18 | シャープ株式会社 | 光磁気記録媒体及びその再生方法 |
-
1993
- 1993-11-03 US US08/147,373 patent/US6261707B1/en not_active Expired - Lifetime
- 1993-11-03 EP EP99120141A patent/EP0974961B1/de not_active Expired - Lifetime
- 1993-11-03 DE DE69331926T patent/DE69331926T2/de not_active Expired - Lifetime
- 1993-11-03 EP EP93308777A patent/EP0596716B1/de not_active Expired - Lifetime
- 1993-11-03 DE DE69332846T patent/DE69332846T2/de not_active Expired - Lifetime
- 1993-11-05 KR KR1019930023379A patent/KR100211472B1/ko not_active IP Right Cessation
-
2000
- 2000-10-10 US US09/685,829 patent/US6483785B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0596716A3 (de) | 1996-09-11 |
EP0974961A2 (de) | 2000-01-26 |
EP0974961B1 (de) | 2003-04-02 |
EP0596716B1 (de) | 2002-05-15 |
DE69332846T2 (de) | 2003-12-24 |
DE69332846D1 (de) | 2003-05-08 |
US6261707B1 (en) | 2001-07-17 |
EP0974961A3 (de) | 2000-07-05 |
EP0596716A2 (de) | 1994-05-11 |
KR100211472B1 (ko) | 1999-08-02 |
DE69331926D1 (de) | 2002-06-20 |
US6483785B1 (en) | 2002-11-19 |
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