DE3883274D1 - Kopf fuer magnetooptisches aufzeichnungsmedium. - Google Patents
Kopf fuer magnetooptisches aufzeichnungsmedium.Info
- Publication number
- DE3883274D1 DE3883274D1 DE8888105173T DE3883274T DE3883274D1 DE 3883274 D1 DE3883274 D1 DE 3883274D1 DE 8888105173 T DE8888105173 T DE 8888105173T DE 3883274 T DE3883274 T DE 3883274T DE 3883274 D1 DE3883274 D1 DE 3883274D1
- Authority
- DE
- Germany
- Prior art keywords
- magneto
- head
- recording medium
- optical recording
- optical
- 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
-
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62081571A JPH0738260B2 (ja) | 1987-04-01 | 1987-04-01 | 光磁気用光ヘツド装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3883274D1 true DE3883274D1 (de) | 1993-09-23 |
DE3883274T2 DE3883274T2 (de) | 1993-12-09 |
Family
ID=13749989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE88105173T Expired - Fee Related DE3883274T2 (de) | 1987-04-01 | 1988-03-30 | Kopf für magnetooptisches Aufzeichnungsmedium. |
Country Status (4)
Country | Link |
---|---|
US (1) | US4894815A (de) |
EP (1) | EP0285126B1 (de) |
JP (1) | JPH0738260B2 (de) |
DE (1) | DE3883274T2 (de) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2683004B2 (ja) * | 1988-01-07 | 1997-11-26 | 株式会社リコー | 光磁気記録再生装置 |
US5115423A (en) * | 1988-01-07 | 1992-05-19 | Ricoh Company, Ltd. | Optomagnetic recording/reproducing apparatus |
US5105403A (en) * | 1988-01-27 | 1992-04-14 | Hitachi, Ltd. | Optical information reading apparatus with waveguide and diffraction grating |
JP2685790B2 (ja) * | 1988-03-28 | 1997-12-03 | 株式会社クラレ | 偏光素子を含む光学系からなる装置 |
EP0339722B1 (de) * | 1988-04-26 | 1993-10-06 | Koninklijke Philips Electronics N.V. | Anordnung zum optischen Abtasten eines magneto-optischen Aufzeichnungsträgers |
US5062094A (en) * | 1988-11-07 | 1991-10-29 | Minolta Camera Kabushiki Kaisha | Optical head for optical disk system |
FR2639460B1 (fr) * | 1988-11-21 | 1993-05-21 | Ricoh Kk | Appareil d'enregistrement/reproduction optique |
JP2574907B2 (ja) * | 1989-11-15 | 1997-01-22 | シャープ株式会社 | 偏光回折素子ユニット並びにそれを含む光ピックアップ装置 |
JP2790648B2 (ja) * | 1989-04-13 | 1998-08-27 | 株式会社リコー | デュアルグレーティングの作成方法 |
EP0405444B1 (de) * | 1989-06-26 | 1997-09-03 | Nec Corporation | Optisches System |
JP2687606B2 (ja) * | 1989-07-19 | 1997-12-08 | 松下電器産業株式会社 | 光ピックアップ |
US5233444A (en) * | 1989-07-25 | 1993-08-03 | Olympus Optical Co., Ltd. | Focus error detecting apparatus |
US5161133A (en) * | 1989-09-29 | 1992-11-03 | International Business Machines Corporation | Magneto-optical storage system |
JPH04167236A (ja) * | 1990-10-31 | 1992-06-15 | Toshiba Corp | 光ディスク装置 |
US5218582A (en) * | 1990-12-03 | 1993-06-08 | Eastman Kodak Company | Magneto-optic readout using a polarization-preserving optical guide |
US5136152A (en) * | 1990-12-19 | 1992-08-04 | Hoetron, Inc. | Hybrid optical pickup with integrated power emission and reading photodetectors |
JP2865223B2 (ja) * | 1990-12-28 | 1999-03-08 | 松下電子工業株式会社 | 光ピックアップ用偏光板および光ピックアップ装置 |
US5245596A (en) * | 1991-06-26 | 1993-09-14 | Eastman Kodak Company | Optical head having a grating with a doubly periodic structure |
EP0547624B1 (de) * | 1991-12-18 | 1997-11-12 | Nec Corporation | System für magneto-optischen Kopf |
EP0579843B1 (de) * | 1992-02-07 | 1999-12-22 | Sony Corporation | Optisches abtastgerät für eine magneto-optische speicherung |
JPH05282723A (ja) * | 1992-03-31 | 1993-10-29 | Matsushita Electric Ind Co Ltd | 光磁気ヘッド装置 |
US5353267A (en) * | 1992-06-02 | 1994-10-04 | Nec Corporation | Magneto-optical light detector apparatus |
WO1995014299A1 (fr) * | 1993-11-19 | 1995-05-26 | Sony Corporation | Appareil de lecture optique |
US5511059A (en) * | 1994-06-14 | 1996-04-23 | Eastman Kodak Company | Multi-element grating beam splitter with a reflection grating element for use in front facet substraction |
US5544143A (en) * | 1994-06-14 | 1996-08-06 | Eastman Kodak Company | Read/write laser-detector-grating unit (LDGU) with an orthogonally-arranged focus and tracking sensor system |
KR970700356A (ko) * | 1994-11-10 | 1997-01-08 | 이데이 노부유키 | 광 픽업 장치 및 광학 디스크 드라이브 장치(Optical pickup apparatus and optical disk drive apparatus) |
JP4778662B2 (ja) * | 2000-06-29 | 2011-09-21 | パナソニック株式会社 | 光ヘッド装置および光情報処理装置 |
TW501116B (en) * | 2000-07-05 | 2002-09-01 | Matsushita Electric Ind Co Ltd | Optical device, optical semiconductor device, and optical information processor comprising them |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4125860A (en) * | 1975-06-16 | 1978-11-14 | Nippon Telegraph And Telephone Public Corporation | Reproducer for an eraseable videodisc |
US4561032A (en) * | 1981-06-02 | 1985-12-24 | Canon Kabushiki Kaisha | Magnetooptic reproducing device |
JPS5979446A (ja) * | 1982-10-28 | 1984-05-08 | Sharp Corp | 磁気光学ヘッド |
DE8410775U1 (de) * | 1984-04-06 | 1986-05-28 | Dr. Johannes Heidenhain Gmbh, 8225 Traunreut | Phasengitter |
CA1257392A (en) * | 1985-03-20 | 1989-07-11 | Masayuki Kato | Optical pickup with hologram lenses |
DE3687274T2 (de) * | 1985-09-27 | 1993-04-15 | Sharp Kk | Spurnachlaufverfahren fuer optische speicherplatte. |
-
1987
- 1987-04-01 JP JP62081571A patent/JPH0738260B2/ja not_active Expired - Lifetime
-
1988
- 1988-03-30 DE DE88105173T patent/DE3883274T2/de not_active Expired - Fee Related
- 1988-03-30 EP EP88105173A patent/EP0285126B1/de not_active Expired - Lifetime
- 1988-04-01 US US07/175,978 patent/US4894815A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0738260B2 (ja) | 1995-04-26 |
EP0285126A3 (en) | 1990-07-11 |
DE3883274T2 (de) | 1993-12-09 |
JPS63247941A (ja) | 1988-10-14 |
US4894815A (en) | 1990-01-16 |
EP0285126B1 (de) | 1993-08-18 |
EP0285126A2 (de) | 1988-10-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3883274D1 (de) | Kopf fuer magnetooptisches aufzeichnungsmedium. | |
DE3876849D1 (de) | Magnetkopfzusammenbau fuer senkrechte magnetaufzeichnung. | |
DE3879996D1 (de) | Aufnahmekopf fuer magnetooptischen aufzeichnungstraeger. | |
DE3671122D1 (de) | Informationsaufzeichnungsmedium. | |
DE3674713D1 (de) | Abgeschirmte schreib-lesekopfstruktur fuer doppelspurige aufzeichnung. | |
DE3583599D1 (de) | Informationsaufzeichnungsmedium. | |
EP0226168A3 (en) | Information recording medium | |
DE3773239D1 (de) | Magnetisches aufzeichnungsmedium. | |
DE3680478D1 (de) | Magnetooptisches aufzeichnungsmedium. | |
DE3853640D1 (de) | Informationsaufzeichnungsmedium. | |
DE3874786D1 (de) | Grundplatte fuer tintenstrahlaufzeichnungskopf. | |
DE3888109D1 (de) | Magneto-optisches Aufzeichnungsmedium. | |
DE68910570D1 (de) | Magneto-optische Wiedergabeköpfe. | |
DE68908762D1 (de) | Thermomagnetischer Aufnahmekopf. | |
DE3855961D1 (de) | Kartenförmiges Aufzeichnungsmedium | |
DE69022951D1 (de) | Optischer Kopf für optisches Informationsaufzeichnungsmedium. | |
DE68917903D1 (de) | Magneto-optischer Aufzeichnungsträger. | |
DE3856472D1 (de) | Datenaufzeichnungsträger | |
DE69024747D1 (de) | Magnetooptisches Aufzeichnungsmedium | |
DE3578056D1 (de) | Thermischer kopf. | |
EP0308183A3 (en) | Recording scheme for information recording medium | |
DE3582366D1 (de) | Optischer kopf fuer magneto-optischen speicher. | |
DE68925393D1 (de) | Magneto-optisches Aufzeichnungsmedium | |
DE69020992D1 (de) | Magneto-optisches Aufzeichnungsmedium. | |
DE3685408D1 (de) | Magnetkopf fuer das aufzeichnen und die wiedergabe. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |