DE69217800D1 - Optisches Wiedergabegerät - Google Patents
Optisches WiedergabegerätInfo
- Publication number
- DE69217800D1 DE69217800D1 DE69217800T DE69217800T DE69217800D1 DE 69217800 D1 DE69217800 D1 DE 69217800D1 DE 69217800 T DE69217800 T DE 69217800T DE 69217800 T DE69217800 T DE 69217800T DE 69217800 D1 DE69217800 D1 DE 69217800D1
- Authority
- DE
- Germany
- Prior art keywords
- playback device
- optical playback
- optical
- playback
- 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
- G11B11/1055—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
-
- 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
- G11B7/0045—Recording
- G11B7/00454—Recording involving phase-change effects
-
- 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
- G11B7/0052—Reproducing involving reflectivity, absorption or colour changes
-
- 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
- G11B7/0901—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 track following only
- G11B7/0903—Multi-beam tracking systems
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3259437A JPH05101431A (ja) | 1991-10-07 | 1991-10-07 | 光デイスク再生装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69217800D1 true DE69217800D1 (de) | 1997-04-10 |
DE69217800T2 DE69217800T2 (de) | 1997-06-12 |
Family
ID=17334079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69217800T Expired - Fee Related DE69217800T2 (de) | 1991-10-07 | 1992-10-07 | Optisches Wiedergabegerät |
Country Status (4)
Country | Link |
---|---|
US (1) | US5450387A (de) |
EP (1) | EP0536718B1 (de) |
JP (1) | JPH05101431A (de) |
DE (1) | DE69217800T2 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5541909A (en) * | 1992-10-19 | 1996-07-30 | Hitachi, Ltd. | Optical disc with phase pits and a reproducing apparatus for data recorded on the optical disc |
JPH06150357A (ja) * | 1992-11-04 | 1994-05-31 | Pioneer Electron Corp | 光ディスク記録再生装置 |
US5610879A (en) * | 1993-03-05 | 1997-03-11 | Matsushita Electric Industrial Co. Ltd. | Optical reproducing device, optical reproducing method using the same, and optical record medium used in the same |
JP2801495B2 (ja) * | 1993-04-07 | 1998-09-21 | シャープ株式会社 | 光記録再生装置 |
JPH07192287A (ja) * | 1993-12-27 | 1995-07-28 | Pioneer Electron Corp | 光ピックアップ装置 |
WO1995029483A1 (fr) * | 1994-04-23 | 1995-11-02 | Sony Corporation | Support d'enregistrement et tete d'enregistrement magneto-optiques |
KR970010941B1 (ko) * | 1994-04-30 | 1997-07-02 | 대우전자 주식회사 | 레이저어레이를 갖춘 광픽업장치 |
US5619487A (en) * | 1994-08-10 | 1997-04-08 | Nippon Telegraph And Telephone Corporation | Optical data readout with two beams on three tracks |
FR2724042B1 (fr) * | 1994-08-30 | 1997-01-03 | Thomson Csf | Systeme d'ecriture/lecture optique d'un support d'enregistrement et application a un disque d'enregistrement |
US5761174A (en) * | 1994-09-02 | 1998-06-02 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Optical pickup device with split hologram element that diffracts light in direction parallel to track |
DE19536396A1 (de) * | 1995-09-29 | 1997-04-03 | Thomson Brandt Gmbh | Wiedergabe- und/oder Aufzeichnungsgerät für optische Aufzeichnungsträger unterschiedlicher Speicherdichte |
JPH0991721A (ja) * | 1995-09-29 | 1997-04-04 | Nec Corp | トラック誤差検出装置 |
EP1124227B1 (de) * | 2000-02-10 | 2007-07-04 | Sony Corporation | Optisches Abtastgerät, Neigungserkennungsvorrichtung, Neigungserkennungsverfahren, und optisches Plattengerät |
KR20020020525A (ko) * | 2000-09-09 | 2002-03-15 | 구자홍 | 광 기록매체의 기록 재생 방법 및 장치 |
DE10062079A1 (de) | 2000-12-13 | 2002-06-27 | Thomson Brandt Gmbh | Verfahren zum Spurzählen und entsprechendes Gerät zum Lesen und/oder Beschreiben eines optischen Aufzeichnungsträgers |
US7145847B2 (en) * | 2002-08-28 | 2006-12-05 | Canon Kabushiki Kaisha | Annealed optical information recording medium and optical information recording/reproducing apparatus for the same |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL160138C (nl) * | 1972-05-11 | 1979-09-17 | Philips Nv | Inrichting voor het uitlezen van een vlakke registratie- drager. |
EP0324949B1 (de) * | 1985-09-27 | 1992-12-09 | Sharp Kabushiki Kaisha | Spurnachlaufverfahren für optische Speicherplatte |
JP2607360B2 (ja) * | 1985-12-04 | 1997-05-07 | パイオニア株式会社 | 3ビーム方式光ピツクアツプ装置 |
CA1295734C (en) * | 1986-04-09 | 1992-02-11 | Kiyonobu Endo | Optical recording medium with tracking tracks arranged with a constant pitch and a method for detecting tracking signal from said medium |
JPH035927A (ja) * | 1989-06-01 | 1991-01-11 | Sony Corp | 光学記録および/または再生装置 |
JP2844824B2 (ja) * | 1990-04-10 | 1999-01-13 | ソニー株式会社 | 光ディスクの信号再生方法 |
JP3160632B2 (ja) * | 1991-09-27 | 2001-04-25 | ソニー株式会社 | 光ディスクとその再生方法 |
-
1991
- 1991-10-07 JP JP3259437A patent/JPH05101431A/ja active Pending
-
1992
- 1992-10-06 US US07/957,600 patent/US5450387A/en not_active Expired - Lifetime
- 1992-10-07 EP EP92117118A patent/EP0536718B1/de not_active Expired - Lifetime
- 1992-10-07 DE DE69217800T patent/DE69217800T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0536718B1 (de) | 1997-03-05 |
JPH05101431A (ja) | 1993-04-23 |
US5450387A (en) | 1995-09-12 |
EP0536718A3 (en) | 1993-12-22 |
DE69217800T2 (de) | 1997-06-12 |
EP0536718A2 (de) | 1993-04-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |