DE69321380D1 - Magnetooptisches Informationsaufzeichnungs- und -wiedergabegerät - Google Patents
Magnetooptisches Informationsaufzeichnungs- und -wiedergabegerätInfo
- Publication number
- DE69321380D1 DE69321380D1 DE69321380T DE69321380T DE69321380D1 DE 69321380 D1 DE69321380 D1 DE 69321380D1 DE 69321380 T DE69321380 T DE 69321380T DE 69321380 T DE69321380 T DE 69321380T DE 69321380 D1 DE69321380 D1 DE 69321380D1
- Authority
- DE
- Germany
- Prior art keywords
- light
- optical information
- information recording
- magneto
- playback device
- 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 - Fee Related
Links
Classifications
-
- 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
- G11B11/10508—Recording by modulating only the magnetic field at 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
- G11B11/10532—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
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
-
- 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
- G11B11/10597—Adaptations for transducing various formats on the same or different carriers
-
- 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
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04779092A JP3144588B2 (ja) | 1992-02-05 | 1992-02-05 | 光磁気情報再生装置 |
JP04778992A JP3144587B2 (ja) | 1992-02-05 | 1992-02-05 | 光磁気情報再生装置 |
JP16553392A JPH05334751A (ja) | 1992-06-02 | 1992-06-02 | 光磁気記録再生装置 |
JP4269096A JPH0696491A (ja) | 1992-09-14 | 1992-09-14 | 光磁気情報再生装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69321380D1 true DE69321380D1 (de) | 1998-11-12 |
DE69321380T2 DE69321380T2 (de) | 1999-04-08 |
Family
ID=27462101
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69321380T Expired - Fee Related DE69321380T2 (de) | 1992-02-05 | 1993-02-02 | Magnetooptisches Informationsaufzeichnungs- und -wiedergabegerät |
Country Status (4)
Country | Link |
---|---|
US (2) | US5577017A (de) |
EP (1) | EP0555049B1 (de) |
AT (1) | ATE172048T1 (de) |
DE (1) | DE69321380T2 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69321380T2 (de) * | 1992-02-05 | 1999-04-08 | Canon Kk | Magnetooptisches Informationsaufzeichnungs- und -wiedergabegerät |
JPH07182705A (ja) * | 1993-12-21 | 1995-07-21 | Fujitsu Ltd | 光磁気媒体及びその再生装置 |
JPH1074344A (ja) * | 1996-06-26 | 1998-03-17 | So Fukada | 磁気光学データ記録の再生装置 |
JPH1092046A (ja) * | 1996-09-19 | 1998-04-10 | Canon Inc | 光磁気情報再生装置 |
WO1998027553A1 (fr) * | 1996-12-19 | 1998-06-25 | Matsushita Electric Industrial Co., Ltd. | Disque optique, procede d'enregistrement et lecture sur disque optique d'information non effaçable, dispositif de lecture de disque optique, dispositif d'enregistrement et lecture de disque optique, dispositif d'enregistrement d'information non effaçable sur disque optique et dispositif d'enregistrement de disque optique |
JPH11134732A (ja) | 1997-08-29 | 1999-05-21 | Canon Inc | 情報記録再生方法 |
US6298015B1 (en) | 1998-06-03 | 2001-10-02 | Canon Kabushiki Kaisha | Magneto-optical reproducing method using a magnified magnetic domain |
US6487148B1 (en) * | 1999-08-04 | 2002-11-26 | Terastor Corp. | Edge detection for servo signals in optical storage system |
AU6319800A (en) * | 1999-08-18 | 2001-03-13 | Matsushita Electric Industrial Co., Ltd. | Optical disk reproducing method and reproducing device |
EP1455351B1 (de) * | 2001-12-14 | 2011-08-17 | Panasonic Corporation | Wiedergabeverfahren für optische Informationen und Vorrichtung zur Verarbeitung optischer Informationen |
JP4228666B2 (ja) * | 2002-11-25 | 2009-02-25 | ソニー株式会社 | 光学ピックアップ装置、記録再生装置及びギャップ検出方法 |
JP2004259328A (ja) * | 2003-02-24 | 2004-09-16 | Pioneer Electronic Corp | 光ピックアップ並びにこれを備えた情報再生装置 |
JP2005346843A (ja) * | 2004-06-03 | 2005-12-15 | Canon Inc | 光学的情報記録再生方法及び装置 |
US7599272B2 (en) * | 2004-11-22 | 2009-10-06 | Canon Kabushiki Kaisha | Method and apparatus for recording and reproducing multi-level information |
US7804754B2 (en) | 2005-08-31 | 2010-09-28 | Canon Kabushiki Kaisha | Optical information recording/reproducing method |
JP2009087423A (ja) * | 2007-09-28 | 2009-04-23 | Sony Optiarc Inc | 光ピックアップ装置、光記録媒体駆動装置及び信号の記録/再生方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5829151A (ja) * | 1981-08-12 | 1983-02-21 | Nec Corp | 光学的記録再生装置における焦点誤差検出装置 |
JPS6282525A (ja) * | 1985-10-08 | 1987-04-16 | Toshiba Corp | 光学ヘツド |
EP0306179B1 (de) * | 1987-08-31 | 1994-02-02 | Canon Kabushiki Kaisha | Informationsaufnahme- und/oder -wiedergabegerät mit Mitteln zur Feststellung aller Spurfolgefehler |
US5043960A (en) * | 1987-09-25 | 1991-08-27 | Hitachi, Ltd. | Overwritable magneto-optic recording and reproducing apparatus |
EP0330507A3 (de) * | 1988-02-26 | 1990-07-04 | Sumitomo Metal Industries, Ltd. | Verfahren zur magneto-optischen Aufnahme und Wiedergabe, Gerät zum Gebrauch des Verfahrens und magneto-optische Scheibe |
JPH01311428A (ja) * | 1988-06-09 | 1989-12-15 | Matsushita Electric Ind Co Ltd | 光ヘッド装置及びこれを用いた光情報装置 |
CA1316597C (en) * | 1988-07-20 | 1993-04-20 | Takeshi Yamaguchi | Magneto-optical memory apparatus and optical memory apparatus |
US4982383A (en) * | 1988-09-30 | 1991-01-01 | Texaco Inc. | Downhole ultrasonic transit-time flowmetering means and method |
JP2805790B2 (ja) * | 1989-01-26 | 1998-09-30 | ソニー株式会社 | 光磁気記録媒体の信号検出装置 |
DE69321380T2 (de) * | 1992-02-05 | 1999-04-08 | Canon Kk | Magnetooptisches Informationsaufzeichnungs- und -wiedergabegerät |
-
1993
- 1993-02-02 DE DE69321380T patent/DE69321380T2/de not_active Expired - Fee Related
- 1993-02-02 EP EP93300750A patent/EP0555049B1/de not_active Expired - Lifetime
- 1993-02-02 AT AT93300750T patent/ATE172048T1/de not_active IP Right Cessation
-
1995
- 1995-08-11 US US08/514,477 patent/US5577017A/en not_active Expired - Lifetime
-
1996
- 1996-10-18 US US08/733,918 patent/US5768219A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69321380T2 (de) | 1999-04-08 |
US5577017A (en) | 1996-11-19 |
US5768219A (en) | 1998-06-16 |
ATE172048T1 (de) | 1998-10-15 |
EP0555049A2 (de) | 1993-08-11 |
EP0555049A3 (en) | 1993-12-08 |
EP0555049B1 (de) | 1998-10-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |