DE69618890D1 - Optischer Kopf für Platten mit hoher Speicherdichte - Google Patents
Optischer Kopf für Platten mit hoher SpeicherdichteInfo
- Publication number
- DE69618890D1 DE69618890D1 DE69618890T DE69618890T DE69618890D1 DE 69618890 D1 DE69618890 D1 DE 69618890D1 DE 69618890 T DE69618890 T DE 69618890T DE 69618890 T DE69618890 T DE 69618890T DE 69618890 D1 DE69618890 D1 DE 69618890D1
- Authority
- DE
- Germany
- Prior art keywords
- high density
- optical head
- density disks
- disks
- 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
- 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
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1353—Diffractive elements, e.g. holograms or gratings
-
- 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
- G11B7/08—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
-
- 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
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
-
- 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
-
- 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
- G11B7/0908—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 focusing only
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7265514A JP2748906B2 (ja) | 1995-10-13 | 1995-10-13 | 光学ヘッド装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69618890D1 true DE69618890D1 (de) | 2002-03-14 |
DE69618890T2 DE69618890T2 (de) | 2002-08-22 |
Family
ID=17418222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69618890T Expired - Fee Related DE69618890T2 (de) | 1995-10-13 | 1996-10-11 | Optischer Kopf für Platten mit hoher Speicherdichte |
Country Status (5)
Country | Link |
---|---|
US (1) | US5748601A (de) |
EP (1) | EP0768651B1 (de) |
JP (1) | JP2748906B2 (de) |
KR (1) | KR100242216B1 (de) |
DE (1) | DE69618890T2 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7038978B2 (en) * | 2000-11-21 | 2006-05-02 | Matsushita Electric Industrial Co., Ltd. | Optical information recording and reproducing apparatus for recording information bits into an optical disk in a three dimensional arrangement |
JP4850703B2 (ja) * | 2004-04-21 | 2012-01-11 | パナソニック株式会社 | 共焦点光学系開口位置制御装置、光ヘッド装置および光情報処理装置 |
US20070036060A1 (en) * | 2005-08-11 | 2007-02-15 | Tdk Corporation | Data recording method, data reproducing method, data recording apparatus, data reproducing apparatus, and information recording medium |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2624255B2 (ja) * | 1987-06-09 | 1997-06-25 | オリンパス光学工業株式会社 | 光記録再生装置 |
JPH0231329A (ja) * | 1988-07-20 | 1990-02-01 | Toshiba Corp | 多重記録方法及び多重記録再生装置 |
JPH0628672A (ja) * | 1992-06-12 | 1994-02-04 | Senri Oyo Keisoku Kenkyusho:Kk | 光学的データ記憶体並びにこの記録装置及び記録再生装置 |
JP2783070B2 (ja) * | 1992-07-28 | 1998-08-06 | 日本電気株式会社 | 光ヘッド装置のピンホール板及びメインビーム検出器 |
JPH0660467A (ja) * | 1992-08-07 | 1994-03-04 | Hitachi Maxell Ltd | 光磁気記録媒体用ヘッド装置 |
JP2655066B2 (ja) * | 1993-12-28 | 1997-09-17 | 日本電気株式会社 | 超解像光ヘッド装置 |
JP2655077B2 (ja) * | 1994-05-17 | 1997-09-17 | 日本電気株式会社 | 光ヘッド装置 |
JP2616722B2 (ja) * | 1994-11-29 | 1997-06-04 | 日本電気株式会社 | 光ヘッド装置 |
JPH08185640A (ja) * | 1994-12-28 | 1996-07-16 | Sony Corp | 多層光ディスク用光ピックアップ装置 |
US5526338A (en) * | 1995-03-10 | 1996-06-11 | Yeda Research & Development Co. Ltd. | Method and apparatus for storage and retrieval with multilayer optical disks |
-
1995
- 1995-10-13 JP JP7265514A patent/JP2748906B2/ja not_active Expired - Lifetime
-
1996
- 1996-10-09 US US08/728,304 patent/US5748601A/en not_active Expired - Fee Related
- 1996-10-11 DE DE69618890T patent/DE69618890T2/de not_active Expired - Fee Related
- 1996-10-11 EP EP96116319A patent/EP0768651B1/de not_active Expired - Lifetime
- 1996-10-12 KR KR1019960046114A patent/KR100242216B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US5748601A (en) | 1998-05-05 |
EP0768651A1 (de) | 1997-04-16 |
KR970023043A (ko) | 1997-05-30 |
DE69618890T2 (de) | 2002-08-22 |
JP2748906B2 (ja) | 1998-05-13 |
JPH09106553A (ja) | 1997-04-22 |
EP0768651B1 (de) | 2002-01-30 |
KR100242216B1 (ko) | 2000-02-01 |
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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 |