DE69020840D1 - Erzeugungsvorrichtung des äusseren Magnetfeldes für magnetooptisches Plattengerät. - Google Patents
Erzeugungsvorrichtung des äusseren Magnetfeldes für magnetooptisches Plattengerät.Info
- Publication number
- DE69020840D1 DE69020840D1 DE69020840T DE69020840T DE69020840D1 DE 69020840 D1 DE69020840 D1 DE 69020840D1 DE 69020840 T DE69020840 T DE 69020840T DE 69020840 T DE69020840 T DE 69020840T DE 69020840 D1 DE69020840 D1 DE 69020840D1
- Authority
- DE
- Germany
- Prior art keywords
- magneto
- magnetic field
- optical disk
- external magnetic
- field generating
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1257883A JPH03120601A (ja) | 1989-10-04 | 1989-10-04 | 光磁気ディスク装置の外部磁界発生装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69020840D1 true DE69020840D1 (de) | 1995-08-17 |
DE69020840T2 DE69020840T2 (de) | 1996-04-04 |
Family
ID=17312511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69020840T Expired - Fee Related DE69020840T2 (de) | 1989-10-04 | 1990-10-04 | Erzeugungsvorrichtung des äusseren Magnetfeldes für magnetooptisches Plattengerät. |
Country Status (4)
Country | Link |
---|---|
US (1) | US5126984A (de) |
EP (1) | EP0421768B1 (de) |
JP (1) | JPH03120601A (de) |
DE (1) | DE69020840T2 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08147915A (ja) * | 1994-11-20 | 1996-06-07 | Sony Corp | 光磁気記録用の磁気ヘッド装置 |
US5793626A (en) * | 1996-05-29 | 1998-08-11 | Lucent Technologies Inc. | High efficiency bimodal power converter and method of operation thereof |
US20080172744A1 (en) * | 2007-01-17 | 2008-07-17 | Honeywell International Inc. | Methods and systems to assure data integrity in a secure data communications network |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60119609A (ja) * | 1983-11-30 | 1985-06-27 | Kao Corp | 垂直磁気記録方式の磁気ヘツド |
JPS60147948A (ja) * | 1984-01-12 | 1985-08-05 | Canon Inc | 光磁気記録装置 |
JPS60224109A (ja) * | 1984-04-20 | 1985-11-08 | Hitachi Ltd | 複合型磁気ヘツドを用いた磁気記録再生装置 |
EP0222916B1 (de) * | 1985-04-29 | 1993-02-03 | Sony Corporation | Externes magnetfeld-umpolungsgerät für fotomagnetische platten |
JPS61278059A (ja) * | 1985-05-31 | 1986-12-08 | Nec Home Electronics Ltd | 光磁気記録再生装置 |
JPS61284845A (ja) * | 1985-06-10 | 1986-12-15 | Matsushita Electric Ind Co Ltd | 光磁気記録再生装置 |
JPS6214352A (ja) * | 1985-07-11 | 1987-01-22 | Nec Home Electronics Ltd | 光磁気記録再生装置 |
EP0218811B1 (de) * | 1985-07-19 | 1991-05-29 | Kabushiki Kaisha Toshiba | Gleitstückzusammenbau für magnetische Köpfe |
JPS6265202A (ja) * | 1985-09-18 | 1987-03-24 | Canon Inc | 補助磁界印加装置 |
US4849952A (en) * | 1985-09-18 | 1989-07-18 | Canon Kabushiki Kaisha | Magnetooptical information recording apparatus having intensified magnetic flux applying means |
US4984225A (en) * | 1987-03-31 | 1991-01-08 | Kabushiki Kaisha Toshiba | System for applying magnetic field to opto-magnetic memory |
-
1989
- 1989-10-04 JP JP1257883A patent/JPH03120601A/ja active Pending
-
1990
- 1990-10-01 US US07/591,875 patent/US5126984A/en not_active Expired - Fee Related
- 1990-10-04 EP EP90310841A patent/EP0421768B1/de not_active Expired - Lifetime
- 1990-10-04 DE DE69020840T patent/DE69020840T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69020840T2 (de) | 1996-04-04 |
JPH03120601A (ja) | 1991-05-22 |
EP0421768A2 (de) | 1991-04-10 |
EP0421768A3 (en) | 1992-09-09 |
EP0421768B1 (de) | 1995-07-12 |
US5126984A (en) | 1992-06-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8328 | Change in the person/name/address of the agent |
Free format text: WESER & KOLLEGEN, 81245 MUENCHEN |
|
8339 | Ceased/non-payment of the annual fee |