CA2014163A1 - Appareil d'enregistrement et de lecture optiques - Google Patents
Appareil d'enregistrement et de lecture optiquesInfo
- Publication number
- CA2014163A1 CA2014163A1 CA2014163A CA2014163A CA2014163A1 CA 2014163 A1 CA2014163 A1 CA 2014163A1 CA 2014163 A CA2014163 A CA 2014163A CA 2014163 A CA2014163 A CA 2014163A CA 2014163 A1 CA2014163 A1 CA 2014163A1
- Authority
- CA
- Canada
- Prior art keywords
- disk
- split
- optical system
- movable optical
- reproducing apparatus
- 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.)
- Granted
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
- G11B7/094—Methods and circuits for servo offset compensation
-
- 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
-
- 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
- G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1095197A JP2744635B2 (ja) | 1989-04-17 | 1989-04-17 | 光記録再生装置 |
| JP1-95197 | 1989-04-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2014163A1 true CA2014163A1 (fr) | 1990-10-17 |
| CA2014163C CA2014163C (fr) | 1994-07-26 |
Family
ID=14131029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002014163A Expired - Lifetime CA2014163C (fr) | 1989-04-17 | 1990-04-09 | Appareil d'enregistrement et de lecture optiques |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0393885B1 (fr) |
| JP (1) | JP2744635B2 (fr) |
| CA (1) | CA2014163C (fr) |
| DE (1) | DE69015413T2 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0417125A (ja) * | 1990-05-09 | 1992-01-21 | Mitsubishi Electric Corp | 光記録再生装置 |
| JPH05258323A (ja) * | 1992-03-16 | 1993-10-08 | Sharp Corp | 光ピックアップ装置 |
| EP0621590B1 (fr) * | 1993-04-23 | 2000-03-29 | Canon Kabushiki Kaisha | Appareil d'enregistrement et/ou de reproduction d'information optique |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4712887A (en) * | 1985-12-20 | 1987-12-15 | Dazar Corporation | Optical system for fast access optical data storage device |
| JPH073710B2 (ja) * | 1987-06-17 | 1995-01-18 | 日本電気株式会社 | 光磁気ディスク装置 |
-
1989
- 1989-04-17 JP JP1095197A patent/JP2744635B2/ja not_active Expired - Fee Related
-
1990
- 1990-04-05 DE DE69015413T patent/DE69015413T2/de not_active Expired - Fee Related
- 1990-04-05 EP EP90303680A patent/EP0393885B1/fr not_active Expired - Lifetime
- 1990-04-09 CA CA002014163A patent/CA2014163C/fr not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE69015413T2 (de) | 1995-08-17 |
| EP0393885A3 (fr) | 1992-01-02 |
| EP0393885B1 (fr) | 1994-12-28 |
| EP0393885A2 (fr) | 1990-10-24 |
| CA2014163C (fr) | 1994-07-26 |
| JPH02276028A (ja) | 1990-11-09 |
| DE69015413D1 (de) | 1995-02-09 |
| JP2744635B2 (ja) | 1998-04-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121202 |