ATE227045T1 - Optische abtastvorrichtung eines mehrschichtigen aufzeichnungsträgers mit fokusregelungsschaltung - Google Patents
Optische abtastvorrichtung eines mehrschichtigen aufzeichnungsträgers mit fokusregelungsschaltungInfo
- Publication number
- ATE227045T1 ATE227045T1 AT96923023T AT96923023T ATE227045T1 AT E227045 T1 ATE227045 T1 AT E227045T1 AT 96923023 T AT96923023 T AT 96923023T AT 96923023 T AT96923023 T AT 96923023T AT E227045 T1 ATE227045 T1 AT E227045T1
- Authority
- AT
- Austria
- Prior art keywords
- focus control
- layer
- control circuit
- focal point
- scanning device
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title abstract 3
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
- 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
- G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
-
- 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
-
- 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
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
- Facsimile Scanning Arrangements (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9502084 | 1995-06-01 | ||
| PCT/IB1996/000759 WO1997005606A2 (en) | 1995-06-01 | 1996-07-30 | Optical scanning apparatus for a multi-layer record carrier, including a focus control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ATE227045T1 true ATE227045T1 (de) | 2002-11-15 |
Family
ID=70277081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT96923023T ATE227045T1 (de) | 1995-06-01 | 1996-07-30 | Optische abtastvorrichtung eines mehrschichtigen aufzeichnungsträgers mit fokusregelungsschaltung |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0787341B1 (de) |
| JP (1) | JPH10507295A (de) |
| AT (1) | ATE227045T1 (de) |
| DE (1) | DE69624553D1 (de) |
| WO (1) | WO1997005606A2 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU775898B2 (en) * | 1998-07-08 | 2004-08-19 | Wea Manufacturing Inc. | Focusing method for optical media |
| JPWO2002086873A1 (ja) | 2001-04-17 | 2004-08-12 | 松下電器産業株式会社 | 光ディスクおよびそれを用いた情報記録／再生方法および情報記録／再生装置 |
| KR20030033447A (ko) * | 2001-10-23 | 2003-05-01 | 김순용 | 잣껍질을 이용한 생활신변용품용 환재 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2458126A1 (fr) * | 1979-05-31 | 1980-12-26 | Thomson Brandt | Systeme de commande de changement de face lue pour un lecteur optique de support d'information et lecteur optique comportant un tel systeme |
| US5255262A (en) * | 1991-06-04 | 1993-10-19 | International Business Machines Corporation | Multiple data surface optical data storage system with transmissive data surfaces |
| JP3413684B2 (ja) * | 1994-12-16 | 2003-06-03 | ソニー株式会社 | 多層光ディスク再生装置および方法 |
-
1996
- 1996-07-30 DE DE69624553T patent/DE69624553D1/de not_active Expired - Lifetime
- 1996-07-30 EP EP96923023A patent/EP0787341B1/de not_active Expired - Lifetime
- 1996-07-30 WO PCT/IB1996/000759 patent/WO1997005606A2/en not_active Ceased
- 1996-07-30 AT AT96923023T patent/ATE227045T1/de not_active IP Right Cessation
- 1996-07-30 JP JP9507408A patent/JPH10507295A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10507295A (ja) | 1998-07-14 |
| WO1997005606A2 (en) | 1997-02-13 |
| WO1997005606A3 (en) | 1997-03-13 |
| EP0787341A2 (de) | 1997-08-06 |
| EP0787341B1 (de) | 2002-10-30 |
| DE69624553D1 (de) | 2002-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RER | Ceased as to paragraph 5 lit. 3 law introducing patent treaties |