FR2335861B1 - - Google Patents
Info
- Publication number
- FR2335861B1 FR2335861B1 FR7538495A FR7538495A FR2335861B1 FR 2335861 B1 FR2335861 B1 FR 2335861B1 FR 7538495 A FR7538495 A FR 7538495A FR 7538495 A FR7538495 A FR 7538495A FR 2335861 B1 FR2335861 B1 FR 2335861B1
- Authority
- FR
- France
- 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
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
- G11B7/0908—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
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7538495A FR2335861A1 (fr) | 1975-12-16 | 1975-12-16 | Dispositif de focalisation et lecteur optique comportant un tel dispositif |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7538495A FR2335861A1 (fr) | 1975-12-16 | 1975-12-16 | Dispositif de focalisation et lecteur optique comportant un tel dispositif |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2335861A1 FR2335861A1 (fr) | 1977-07-15 |
FR2335861B1 true FR2335861B1 (ja) | 1978-08-18 |
Family
ID=9163795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7538495A Granted FR2335861A1 (fr) | 1975-12-16 | 1975-12-16 | Dispositif de focalisation et lecteur optique comportant un tel dispositif |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2335861A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4688201A (en) * | 1985-01-16 | 1987-08-18 | Hewlett-Packard Company | Focusing and tracking apparatus for an optical data storage device |
EP0213561B1 (de) * | 1985-08-27 | 1990-11-14 | Siemens Aktiengesellschaft | Positioniereinrichtung für einen optischen Plattenspeicher |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2251876B1 (ja) * | 1973-11-16 | 1977-09-23 | Thomson Brandt |
-
1975
- 1975-12-16 FR FR7538495A patent/FR2335861A1/fr active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2335861A1 (fr) | 1977-07-15 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |