DE69621199D1 - Optischer Wiedergabekopf mit verbesserter Wiedergabe von Medien mit Pits unterschiedlicher Tiefen - Google Patents
Optischer Wiedergabekopf mit verbesserter Wiedergabe von Medien mit Pits unterschiedlicher TiefenInfo
- Publication number
- DE69621199D1 DE69621199D1 DE69621199T DE69621199T DE69621199D1 DE 69621199 D1 DE69621199 D1 DE 69621199D1 DE 69621199 T DE69621199 T DE 69621199T DE 69621199 T DE69621199 T DE 69621199T DE 69621199 D1 DE69621199 D1 DE 69621199D1
- Authority
- DE
- Germany
- Prior art keywords
- playback
- pits
- media
- different depths
- improved
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
- G11B7/131—Arrangement of detectors in a multiple array
-
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24085—Pits
-
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24085—Pits
- G11B7/24088—Pits for storing more than two values, i.e. multi-valued recording for data or prepits
-
- 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
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
- G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7208029A JP2751884B2 (ja) | 1995-08-15 | 1995-08-15 | 光ヘッド装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69621199D1 true DE69621199D1 (de) | 2002-06-20 |
DE69621199T2 DE69621199T2 (de) | 2002-09-26 |
Family
ID=16549500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69621199T Expired - Fee Related DE69621199T2 (de) | 1995-08-15 | 1996-08-14 | Optischer Wiedergabekopf mit verbesserter Wiedergabe von Medien mit Pits unterschiedlicher Tiefen |
Country Status (5)
Country | Link |
---|---|
US (1) | US5838651A (de) |
EP (1) | EP0762402B1 (de) |
JP (1) | JP2751884B2 (de) |
KR (1) | KR100242215B1 (de) |
DE (1) | DE69621199T2 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1064651B1 (de) | 1998-03-10 | 2002-07-17 | QinetiQ Limited | Dreidimensionales bildformungssystem |
JPH11272721A (ja) | 1998-03-19 | 1999-10-08 | Fujitsu Ltd | 干渉チェック結果表示方法および干渉チェック結果表示装置ならびに干渉チェック結果表示プログラムが記録されたコンピュータ読取可能な記録媒体 |
EP0984440A3 (de) | 1998-09-04 | 2000-05-24 | Matsushita Electric Industrial Co., Ltd. | Vorrichtung zur Aberrationsdetektion und Gerät zur Aufnahme und Wiedergabe von optischer Information |
CA2464808A1 (en) * | 2002-02-07 | 2003-08-14 | Verification Technologies, Inc. | Method and system for optical disc copy-protection |
JP4071141B2 (ja) * | 2003-03-31 | 2008-04-02 | シャープ株式会社 | 半導体レーザ装置および光ピックアップ装置 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58215735A (ja) * | 1982-06-07 | 1983-12-15 | Sony Corp | 光学式デイスク記録方法 |
JPS6112974A (ja) * | 1984-06-26 | 1986-01-21 | 東洋紡績株式会社 | 連続マルチフイラメントの開繊方法 |
JPS648514A (en) * | 1987-07-01 | 1989-01-12 | Canon Kk | Method and device for reproducing optical information and optical information recording medium |
JPH0778904B2 (ja) * | 1989-01-27 | 1995-08-23 | シャープ株式会社 | 光ピックアップ装置 |
JP2687606B2 (ja) * | 1989-07-19 | 1997-12-08 | 松下電器産業株式会社 | 光ピックアップ |
JPH0492212A (ja) * | 1990-08-06 | 1992-03-25 | Olympus Optical Co Ltd | 光学式多値記録および再生方式 |
JP2865223B2 (ja) * | 1990-12-28 | 1999-03-08 | 松下電子工業株式会社 | 光ピックアップ用偏光板および光ピックアップ装置 |
TW218427B (de) * | 1991-06-04 | 1994-01-01 | Ibm | |
JPH056546A (ja) * | 1991-06-28 | 1993-01-14 | Casio Comput Co Ltd | 情報再生装置及び情報記録再生装置 |
US5251198A (en) * | 1992-05-29 | 1993-10-05 | Strickler James H | Reading device for multi-layered optical information carrier |
JP3135389B2 (ja) * | 1992-10-23 | 2001-02-13 | 松下電器産業株式会社 | 情報再生方法、情報記録再生方法、情報再生装置、記録媒体及び光ヘッド |
JPH0778353A (ja) * | 1992-11-26 | 1995-03-20 | Matsushita Electric Ind Co Ltd | 光ディスクおよび光ディスク装置 |
JP2532818B2 (ja) * | 1993-02-01 | 1996-09-11 | 松下電器産業株式会社 | 対物レンズおよび光ヘッド装置 |
JP2570563B2 (ja) * | 1993-02-16 | 1997-01-08 | 日本電気株式会社 | 光ヘッド装置 |
JPH06300921A (ja) * | 1993-04-16 | 1994-10-28 | Nec Corp | ホログラム素子及び光ヘッド装置 |
US5453969A (en) * | 1994-05-04 | 1995-09-26 | California Institute Of Technology | Optical memory with pit depth encoding |
KR100200837B1 (ko) * | 1995-01-24 | 1999-06-15 | 윤종용 | 다층 기록막을 갖는 광디스크를 위한 광픽업 |
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
- 1995-08-15 JP JP7208029A patent/JP2751884B2/ja not_active Expired - Lifetime
-
1996
- 1996-08-07 US US08/689,247 patent/US5838651A/en not_active Expired - Fee Related
- 1996-08-13 KR KR1019960034132A patent/KR100242215B1/ko not_active IP Right Cessation
- 1996-08-14 EP EP96113084A patent/EP0762402B1/de not_active Expired - Lifetime
- 1996-08-14 DE DE69621199T patent/DE69621199T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0954972A (ja) | 1997-02-25 |
US5838651A (en) | 1998-11-17 |
JP2751884B2 (ja) | 1998-05-18 |
EP0762402B1 (de) | 2002-05-15 |
DE69621199T2 (de) | 2002-09-26 |
KR100242215B1 (ko) | 2000-02-01 |
EP0762402A1 (de) | 1997-03-12 |
KR970012388A (ko) | 1997-03-29 |
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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 |