DE69026698D1 - Magneto-optische Methode und System zur Aufnahme und Wiedergabe von digitalen Daten hoher Dichte - Google Patents
Magneto-optische Methode und System zur Aufnahme und Wiedergabe von digitalen Daten hoher DichteInfo
- Publication number
- DE69026698D1 DE69026698D1 DE69026698T DE69026698T DE69026698D1 DE 69026698 D1 DE69026698 D1 DE 69026698D1 DE 69026698 T DE69026698 T DE 69026698T DE 69026698 T DE69026698 T DE 69026698T DE 69026698 D1 DE69026698 D1 DE 69026698D1
- Authority
- DE
- Germany
- Prior art keywords
- magneto
- recording
- digital data
- optical method
- density digital
- 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
- G11B11/10532—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
- G11B11/10502—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
-
- 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
- G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
- G11B11/10536—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording using thermic beams, e.g. lasers
-
- 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 |
---|---|---|---|
EP90810017A EP0437170B1 (de) | 1990-01-09 | 1990-01-09 | Magneto-optische Methode und System zur Aufnahme und Wiedergabe von digitalen Daten hoher Dichte |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69026698D1 true DE69026698D1 (de) | 1996-05-30 |
DE69026698T2 DE69026698T2 (de) | 1996-11-21 |
Family
ID=8205896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69026698T Expired - Fee Related DE69026698T2 (de) | 1990-01-09 | 1990-01-09 | Magneto-optische Methode und System zur Aufnahme und Wiedergabe von digitalen Daten hoher Dichte |
Country Status (4)
Country | Link |
---|---|
US (1) | US5200936A (de) |
EP (1) | EP0437170B1 (de) |
JP (1) | JP2728103B2 (de) |
DE (1) | DE69026698T2 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5808973A (en) * | 1995-09-06 | 1998-09-15 | Kabushiki Kaisha Toshiba | Near field recording and reproducing apparatus |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1956626A (en) * | 1931-03-14 | 1934-05-01 | Percy A Robbins | Translucent sound record |
US3626114A (en) * | 1969-03-10 | 1971-12-07 | California Inst Of Techn | Thermomagnetic recording and magneto-optic playback system |
US4153328A (en) * | 1974-05-13 | 1979-05-08 | The Regents Of The University Of California | Polarization converter and circuit elements for use in optical waveguides |
JPS5420747A (en) * | 1977-07-15 | 1979-02-16 | Hitachi Ltd | Photo coupling element |
JPS57171813A (en) * | 1981-04-15 | 1982-10-22 | Kenkichi Tsukamoto | Method and device for compressing and expanding audio signal |
EP0112402B1 (de) * | 1982-12-27 | 1987-08-05 | International Business Machines Corporation | Lichtwellenleiter mit einer Submikronöffnung, Verfahren zur Herstellung des Wellenleiters und Verwendung des Wellenleiters mit einem optischen Speicher |
FR2542472B1 (fr) * | 1983-03-11 | 1985-06-21 | Thomson Brandt | Carte a lecture optique portant des informations numeriques et systeme de controle d'acces a des informations diffusees utilisant une telle carte |
JPS6139251A (ja) * | 1984-07-27 | 1986-02-25 | Sony Corp | 磁気記録光再生装置 |
JPS6163945A (ja) * | 1984-09-04 | 1986-04-02 | Matsushita Electric Ind Co Ltd | 光磁気デイスク装置 |
EP0185782B1 (de) * | 1984-12-28 | 1989-03-15 | International Business Machines Corporation | Wellenleiter für ein optisches Nahfeldmikroskop |
JPS61160845A (ja) * | 1985-01-09 | 1986-07-21 | Nippon Kogaku Kk <Nikon> | 光デイスクの記録再生装置 |
JPS61250852A (ja) * | 1985-04-30 | 1986-11-07 | Nec Home Electronics Ltd | 光記録再生装置 |
NL8502625A (nl) * | 1985-09-26 | 1987-04-16 | Philips Nv | Optisch transmissiesysteem bevattende een stralingsbron en een meervoudig beklede monomode optische transmissievezel met een negatieve stap in het brekingsindexprofiel. |
DE3544136A1 (de) * | 1985-12-13 | 1987-06-19 | Siemens Ag | Fasertaper, insbesondere zur kopplung einer monomodefaser mit einem halbleiterlaser |
JPS62170054A (ja) * | 1986-01-21 | 1987-07-27 | Seiko Epson Corp | 光学ヘツド |
JP2617176B2 (ja) * | 1986-04-10 | 1997-06-04 | シャープ株式会社 | 光ヘツド |
US4812002A (en) * | 1986-10-24 | 1989-03-14 | Hitachi, Ltd. | Optical coupling device and method of making the same |
JP2661032B2 (ja) * | 1987-04-15 | 1997-10-08 | 三菱電機株式会社 | 光学的波長多重記録再生装置 |
JPH01124131A (ja) * | 1987-11-09 | 1989-05-17 | Hitachi Ltd | 光磁気記録媒体 |
US4823220A (en) * | 1987-11-16 | 1989-04-18 | International Business Machines Corporation | Detector for magnetooptic recorders |
JP2630976B2 (ja) * | 1988-03-19 | 1997-07-16 | 富士通株式会社 | 光磁気記録媒体 |
US4844580A (en) * | 1988-05-16 | 1989-07-04 | Gte Products Corporation | Fiber optic lens |
EP0355241A1 (de) * | 1988-08-18 | 1990-02-28 | International Business Machines Corporation | Raster-Tunnelmikroskop mit polarisiertem Spin |
US4946239A (en) * | 1988-09-27 | 1990-08-07 | Georgia Tech Research Corporation | Optical power isolator |
US5018865A (en) * | 1988-10-21 | 1991-05-28 | Ferrell Thomas L | Photon scanning tunneling microscopy |
-
1990
- 1990-01-09 DE DE69026698T patent/DE69026698T2/de not_active Expired - Fee Related
- 1990-01-09 EP EP90810017A patent/EP0437170B1/de not_active Expired - Lifetime
- 1990-08-24 US US07/571,796 patent/US5200936A/en not_active Expired - Lifetime
- 1990-10-31 JP JP2292232A patent/JP2728103B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0437170B1 (de) | 1996-04-24 |
JPH03212838A (ja) | 1991-09-18 |
JP2728103B2 (ja) | 1998-03-18 |
DE69026698T2 (de) | 1996-11-21 |
EP0437170A1 (de) | 1991-07-17 |
US5200936A (en) | 1993-04-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: MEDIATEK INC., HSINCHU, TW |
|
8339 | Ceased/non-payment of the annual fee |