FR2802696B1 - Lecteur magneto optique optimise par le polariseur de lumiere incidente - Google Patents
Lecteur magneto optique optimise par le polariseur de lumiere incidenteInfo
- Publication number
- FR2802696B1 FR2802696B1 FR9915987A FR9915987A FR2802696B1 FR 2802696 B1 FR2802696 B1 FR 2802696B1 FR 9915987 A FR9915987 A FR 9915987A FR 9915987 A FR9915987 A FR 9915987A FR 2802696 B1 FR2802696 B1 FR 2802696B1
- Authority
- FR
- France
- Prior art keywords
- incident light
- optical reader
- magneto optical
- light polarizer
- optimized
- 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
- 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
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1362—Mirrors
-
- 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
- G11B11/10547—Heads for reproducing using optical beam of radiation interacting with the magnetisation of an intermediate transfer element, e.g. magnetic film, included in the head
-
- 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
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
-
- 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
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9915987A FR2802696B1 (fr) | 1999-12-17 | 1999-12-17 | Lecteur magneto optique optimise par le polariseur de lumiere incidente |
AU28551/01A AU2855101A (en) | 1999-12-17 | 2000-12-12 | Magneto-optical reader which is optimized by the incident-light polariser |
PCT/FR2000/003485 WO2001045099A1 (fr) | 1999-12-17 | 2000-12-12 | Lecteur magneto-optique optimise par le polariseur de lumiere incidente |
US10/149,788 US6944102B2 (en) | 1999-12-17 | 2000-12-12 | Magneto-optical reader which is optimized by the incident-light polariser |
NO20022907A NO20022907L (no) | 1999-12-17 | 2002-06-17 | Magnetooptisk leser optimalisert med lyspolarisasjon |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9915987A FR2802696B1 (fr) | 1999-12-17 | 1999-12-17 | Lecteur magneto optique optimise par le polariseur de lumiere incidente |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2802696A1 FR2802696A1 (fr) | 2001-06-22 |
FR2802696B1 true FR2802696B1 (fr) | 2002-07-19 |
Family
ID=9553416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9915987A Expired - Fee Related FR2802696B1 (fr) | 1999-12-17 | 1999-12-17 | Lecteur magneto optique optimise par le polariseur de lumiere incidente |
Country Status (5)
Country | Link |
---|---|
US (1) | US6944102B2 (fr) |
AU (1) | AU2855101A (fr) |
FR (1) | FR2802696B1 (fr) |
NO (1) | NO20022907L (fr) |
WO (1) | WO2001045099A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG121900A1 (en) * | 2004-10-08 | 2006-05-26 | Olympus Technologies Singapore | An optical receiving device |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3636535A (en) * | 1969-12-10 | 1972-01-18 | Magnavox Co | Magneto-optical transducer |
JPS5459915A (en) * | 1977-10-20 | 1979-05-15 | Sony Corp | Method and apparatus for reading of magnetic recording signal |
NL8203725A (nl) * | 1982-09-27 | 1984-04-16 | Philips Nv | Thermo-magneto-optische geheugeninrichting en registratiemedium daarvoor. |
EP0156058A3 (fr) * | 1983-08-06 | 1986-01-29 | Brother Kogyo Kabushiki Kaisha | Appareil de lecture magnéto-optique |
US4654837A (en) * | 1985-09-06 | 1987-03-31 | Datatape Incorporated | Magneto-optic transducer with enhanced signal performance |
US4918675A (en) * | 1986-12-04 | 1990-04-17 | Pencom International Corporation | Magneto-optical head with separate optical paths for error and data detection |
CN1043203A (zh) * | 1988-12-02 | 1990-06-20 | 三井石油化学工业株式会社 | 光输出控制方法及其装置 |
JP2786484B2 (ja) * | 1989-01-25 | 1998-08-13 | オリンパス光学工業株式会社 | 光磁気再生装置 |
JP2706128B2 (ja) * | 1989-02-28 | 1998-01-28 | オリンパス光学工業株式会社 | 光磁気再生装置 |
FR2657190B1 (fr) * | 1990-01-18 | 1995-07-21 | Thomson Csf | Dispositif de lecture de segments oblongs d'un support en defilement. |
JP2798185B2 (ja) * | 1990-07-26 | 1998-09-17 | キヤノン株式会社 | 光磁気式情報再生装置用光学ヘッド |
JPH04301245A (ja) * | 1991-03-28 | 1992-10-23 | Canon Inc | 光磁気記録再生用光ヘッド |
US5282188A (en) * | 1992-02-18 | 1994-01-25 | Eastman Kodak Company | Apparatus and method for optimizing performance in read/write head of an optical storage system with a magneto-optical storage medium |
FR2696037B1 (fr) * | 1992-09-18 | 1994-11-04 | Thomson Csf | Dispositif de lecture magnétique. |
FR2699724B1 (fr) * | 1992-12-22 | 1995-01-20 | Thomson Csf | Procédé de lecture d'un support d'enregistrement et système appliquant ce procédé. |
FR2701332B1 (fr) * | 1993-02-09 | 1995-03-10 | Thomson Csf | Tête de lecture magnéto-optique et appareil de lecture d'enregistrements magnétiques multipistes. |
FR2726960B1 (fr) * | 1994-11-10 | 1996-12-13 | Thomson Csf | Procede de realisation de transducteurs magnetoresistifs |
US5586101A (en) * | 1995-03-01 | 1996-12-17 | Eastman Kodak Company | Magneto-optic data storage system with differential detection channels having separate gain control circuit |
JP3670720B2 (ja) * | 1995-07-25 | 2005-07-13 | ペンタックス株式会社 | 情報読み取り装置の製造方法 |
AU4322897A (en) * | 1996-10-08 | 1998-05-05 | Sanyo Electric Co., Ltd. | Recording medium and information recorder/reproducer |
-
1999
- 1999-12-17 FR FR9915987A patent/FR2802696B1/fr not_active Expired - Fee Related
-
2000
- 2000-12-12 WO PCT/FR2000/003485 patent/WO2001045099A1/fr active Application Filing
- 2000-12-12 US US10/149,788 patent/US6944102B2/en not_active Expired - Fee Related
- 2000-12-12 AU AU28551/01A patent/AU2855101A/en not_active Abandoned
-
2002
- 2002-06-17 NO NO20022907A patent/NO20022907L/no not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
US20040042700A1 (en) | 2004-03-04 |
AU2855101A (en) | 2001-06-25 |
NO20022907D0 (no) | 2002-06-17 |
WO2001045099A1 (fr) | 2001-06-21 |
FR2802696A1 (fr) | 2001-06-22 |
NO20022907L (no) | 2002-08-07 |
US6944102B2 (en) | 2005-09-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CD | Change of name or company name | ||
CA | Change of address | ||
TP | Transmission of property | ||
ST | Notification of lapse |
Effective date: 20140829 |