EP1095375A4 - Focusing method for optical media - Google Patents
Focusing method for optical mediaInfo
- Publication number
- EP1095375A4 EP1095375A4 EP98935578A EP98935578A EP1095375A4 EP 1095375 A4 EP1095375 A4 EP 1095375A4 EP 98935578 A EP98935578 A EP 98935578A EP 98935578 A EP98935578 A EP 98935578A EP 1095375 A4 EP1095375 A4 EP 1095375A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- optical media
- focusing method
- focusing
- media
- 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.)
- Withdrawn
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
- 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
- G11B7/0945—Methods for initialising servos, start-up sequences
-
- 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
-
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1998/014203 WO2000003391A1 (en) | 1996-05-24 | 1998-07-08 | Focusing method for optical media |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1095375A1 EP1095375A1 (en) | 2001-05-02 |
EP1095375A4 true EP1095375A4 (en) | 2004-05-12 |
Family
ID=22267448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98935578A Withdrawn EP1095375A4 (en) | 1998-07-08 | 1998-07-08 | Focusing method for optical media |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1095375A4 (en) |
AU (1) | AU775898B2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0717401A1 (en) * | 1994-12-16 | 1996-06-19 | Sony Corporation | Apparatus and method for reproducing data from multilayered disks |
WO1997005606A2 (en) * | 1995-06-01 | 1997-02-13 | Philips Electronics N.V. | Optical scanning apparatus for a multi-layer record carrier, including a focus control circuit |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1120477C (en) * | 1995-07-31 | 2003-09-03 | 皇家菲利浦电子有限公司 | Optical scanning apparatus for multi-layer record carrier, including focus control circuit |
KR0183172B1 (en) * | 1995-09-30 | 1999-04-15 | 김광호 | Dual layer disk focusing apparatus and method thereof |
-
1998
- 1998-07-08 EP EP98935578A patent/EP1095375A4/en not_active Withdrawn
- 1998-07-08 AU AU84793/98A patent/AU775898B2/en not_active Ceased
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0717401A1 (en) * | 1994-12-16 | 1996-06-19 | Sony Corporation | Apparatus and method for reproducing data from multilayered disks |
WO1997005606A2 (en) * | 1995-06-01 | 1997-02-13 | Philips Electronics N.V. | Optical scanning apparatus for a multi-layer record carrier, including a focus control circuit |
Non-Patent Citations (1)
Title |
---|
See also references of WO0003391A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU8479398A (en) | 2000-02-01 |
AU775898B2 (en) | 2004-08-19 |
EP1095375A1 (en) | 2001-05-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20010208 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20040325 |
|
REG | Reference to a national code |
Ref country code: HK Ref legal event code: WD Ref document number: 1039393 Country of ref document: HK |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20080212 |