DE69020624T2 - Signalwiedergabegerät für optische Aufzeichnungs- und Wiedergabeapparatur und Methode für dasselbe. - Google Patents
Signalwiedergabegerät für optische Aufzeichnungs- und Wiedergabeapparatur und Methode für dasselbe.Info
- Publication number
- DE69020624T2 DE69020624T2 DE69020624T DE69020624T DE69020624T2 DE 69020624 T2 DE69020624 T2 DE 69020624T2 DE 69020624 T DE69020624 T DE 69020624T DE 69020624 T DE69020624 T DE 69020624T DE 69020624 T2 DE69020624 T2 DE 69020624T2
- Authority
- DE
- Germany
- Prior art keywords
- reproducing apparatus
- same
- optical recording
- signal
- signal reproducing
- 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
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
- G11B7/13—Optical detectors therefor
-
- 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
- G11B11/10541—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
- G11B11/10595—Control of operating function
-
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
-
- 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
- G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1100112A JP2586641B2 (ja) | 1989-04-21 | 1989-04-21 | 光ヘッド装置 |
JP17651489A JP2600911B2 (ja) | 1989-07-06 | 1989-07-06 | 光ディスク信号再生装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69020624D1 DE69020624D1 (de) | 1995-08-10 |
DE69020624T2 true DE69020624T2 (de) | 1995-12-21 |
Family
ID=26441196
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69020624T Expired - Lifetime DE69020624T2 (de) | 1989-04-21 | 1990-04-23 | Signalwiedergabegerät für optische Aufzeichnungs- und Wiedergabeapparatur und Methode für dasselbe. |
Country Status (3)
Country | Link |
---|---|
US (1) | US5181161A (de) |
EP (1) | EP0393719B1 (de) |
DE (1) | DE69020624T2 (de) |
Families Citing this family (118)
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US4720825A (en) * | 1984-02-06 | 1988-01-19 | Asahi Kogaku Kogyo Kabushiki Kaisha | Optical data reproducing devices having improved trick play capability |
US4858218A (en) * | 1984-09-12 | 1989-08-15 | Nikon Corporation | Optical recording medium and reproducing apparatus |
US4633455A (en) * | 1985-03-25 | 1986-12-30 | Rca Corporation | Headwheel for a multiple beam optical tape playback system |
JPS61273779A (ja) * | 1985-05-28 | 1986-12-04 | Canon Inc | 情報再生装置 |
JPS61287056A (ja) * | 1985-06-12 | 1986-12-17 | Toshiba Corp | 光情報記録再生装置 |
JP2619381B2 (ja) * | 1987-03-20 | 1997-06-11 | 株式会社日立製作所 | 光学的情報再生装置 |
JPH01138627A (ja) * | 1987-11-26 | 1989-05-31 | Ricoh Co Ltd | 光デイスク装置 |
JPH0782721B2 (ja) * | 1988-10-05 | 1995-09-06 | パイオニア株式会社 | ディスクプレーヤのサーボ装置 |
-
1990
- 1990-04-23 US US07/513,451 patent/US5181161A/en not_active Expired - Lifetime
- 1990-04-23 DE DE69020624T patent/DE69020624T2/de not_active Expired - Lifetime
- 1990-04-23 EP EP90107616A patent/EP0393719B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0393719A3 (de) | 1992-01-15 |
US5181161A (en) | 1993-01-19 |
EP0393719A2 (de) | 1990-10-24 |
DE69020624D1 (de) | 1995-08-10 |
EP0393719B1 (de) | 1995-07-05 |
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