JPH0232692B2 - - Google Patents
Info
- Publication number
- JPH0232692B2 JPH0232692B2 JP58025495A JP2549583A JPH0232692B2 JP H0232692 B2 JPH0232692 B2 JP H0232692B2 JP 58025495 A JP58025495 A JP 58025495A JP 2549583 A JP2549583 A JP 2549583A JP H0232692 B2 JPH0232692 B2 JP H0232692B2
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- magnetic field
- recording
- information
- light beam
- 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 - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 claims description 52
- 230000003287 optical effect Effects 0.000 claims description 29
- 230000004907 flux Effects 0.000 claims description 10
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims 1
- 230000005294 ferromagnetic effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000005415 magnetization Effects 0.000 description 5
- 230000002411 adverse Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 206010067482 No adverse event Diseases 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10552—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base
- G11B11/10554—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base the transducers being disposed on the same side of the carrier
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
- Optical Head (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58025495A JPS59152503A (ja) | 1983-02-19 | 1983-02-19 | 光磁気記録装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58025495A JPS59152503A (ja) | 1983-02-19 | 1983-02-19 | 光磁気記録装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59152503A JPS59152503A (ja) | 1984-08-31 |
JPH0232692B2 true JPH0232692B2 (fr) | 1990-07-23 |
Family
ID=12167637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58025495A Granted JPS59152503A (ja) | 1983-02-19 | 1983-02-19 | 光磁気記録装置 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59152503A (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1208361A (fr) * | 1983-01-25 | 1986-07-22 | Yoshikazu Fujii | Commande de positionnement du foyer dans un appareil a disque optique |
US4658390A (en) * | 1983-04-18 | 1987-04-14 | Sharp Kabushiki Kaisha | Optical focus position control in an optical memory system |
JPH065585B2 (ja) * | 1984-02-15 | 1994-01-19 | 株式会社日立製作所 | 光磁気記憶装置 |
JPS613504U (ja) * | 1984-06-14 | 1986-01-10 | ソニー株式会社 | 光磁気記録装置 |
JPS6417201A (en) * | 1987-07-09 | 1989-01-20 | Nec Corp | Electromagnet for impressing magnetic field for magneto-optical disk |
JPH01178104A (ja) * | 1988-01-05 | 1989-07-14 | Nec Corp | 光磁気ディスク用磁界印加電磁石 |
JPH01178106A (ja) * | 1988-01-06 | 1989-07-14 | Nec Corp | 光磁気ディスク用磁界印加装置 |
JPH01178107A (ja) * | 1988-01-08 | 1989-07-14 | Nec Corp | 光磁気ディスク用磁界印加装置 |
US5022018A (en) * | 1989-02-16 | 1991-06-04 | Minnesota Mining And Manufacturing Company | System for applying a perpendicular magnetic field to the illuminated side of a magneto-optic medium |
JPH0332731U (fr) * | 1989-08-08 | 1991-03-29 |
-
1983
- 1983-02-19 JP JP58025495A patent/JPS59152503A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS59152503A (ja) | 1984-08-31 |
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