GB2259803B - Optical playback systems - Google Patents
Optical playback systemsInfo
- Publication number
- GB2259803B GB2259803B GB9217699A GB9217699A GB2259803B GB 2259803 B GB2259803 B GB 2259803B GB 9217699 A GB9217699 A GB 9217699A GB 9217699 A GB9217699 A GB 9217699A GB 2259803 B GB2259803 B GB 2259803B
- Authority
- GB
- United Kingdom
- Prior art keywords
- playback systems
- optical playback
- optical
- systems
- 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
- 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
-
- 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
-
- 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
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
-
- 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
- G11B7/0909—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 by astigmatic methods
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB919117925A GB9117925D0 (en) | 1991-08-20 | 1991-08-20 | Optical playback systems |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9217699D0 GB9217699D0 (en) | 1992-09-30 |
GB2259803A GB2259803A (en) | 1993-03-24 |
GB2259803B true GB2259803B (en) | 1995-06-07 |
Family
ID=10700224
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB919117925A Pending GB9117925D0 (en) | 1991-08-20 | 1991-08-20 | Optical playback systems |
GB9217699A Expired - Fee Related GB2259803B (en) | 1991-08-20 | 1992-08-20 | Optical playback systems |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB919117925A Pending GB9117925D0 (en) | 1991-08-20 | 1991-08-20 | Optical playback systems |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB9117925D0 (en) |
-
1991
- 1991-08-20 GB GB919117925A patent/GB9117925D0/en active Pending
-
1992
- 1992-08-20 GB GB9217699A patent/GB2259803B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
GB9117925D0 (en) | 1991-10-09 |
GB2259803A (en) | 1993-03-24 |
GB9217699D0 (en) | 1992-09-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB2283833B (en) | Helmet-mounted optical systems | |
GB9324292D0 (en) | Optical system | |
IL111218A0 (en) | Optical systems | |
GB9224672D0 (en) | Video special effects system | |
GB9103262D0 (en) | Optical systems | |
EP0507523A3 (en) | Laser system | |
EP0482645A3 (en) | Optical recording system | |
EP0517187A3 (en) | Wideband optical amplifier-receiver system | |
EP0488111A3 (en) | Optical disk system | |
GB9206310D0 (en) | Optical system | |
HK1023444A1 (en) | Optical data storage system | |
EP0534433A3 (en) | Optical regenerative-repeater system | |
GB9103846D0 (en) | Lens system | |
GB9315214D0 (en) | Optical systems | |
GB2260046B (en) | Optical communications systems | |
AU8905591A (en) | Video systems | |
GB2247099B (en) | Optical system for optical disk devices | |
GB2258109B (en) | Autofocus systems | |
EP0520326A3 (en) | Mirror optical system | |
GB2257596B (en) | Video playback system | |
GB2272323B (en) | Optical pickup system | |
GB2259803B (en) | Optical playback systems | |
EP0508302A3 (en) | Laser disk playback system | |
GB9108299D0 (en) | Optical systems | |
GB9116729D0 (en) | Optical systems |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19980820 |