FR2260911A1 - - Google Patents
Info
- Publication number
- FR2260911A1 FR2260911A1 FR7504326A FR7504326A FR2260911A1 FR 2260911 A1 FR2260911 A1 FR 2260911A1 FR 7504326 A FR7504326 A FR 7504326A FR 7504326 A FR7504326 A FR 7504326A FR 2260911 A1 FR2260911 A1 FR 2260911A1
- 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.)
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
-
- 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
- G11B7/0938—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 servo format, e.g. guide tracks, pilot signals
-
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24085—Pits
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7401858A NL7401858A (nl) | 1974-02-12 | 1974-02-12 | Registratiedrager waarop informatie is aange- t in een optisch uitleesbare struktuur. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2260911A1 true FR2260911A1 (es) | 1975-09-05 |
| FR2260911B1 FR2260911B1 (es) | 1982-03-05 |
Family
ID=19820729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7504326A Expired FR2260911B1 (es) | 1974-02-12 | 1975-02-12 |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS50119517A (es) |
| AT (1) | AT338889B (es) |
| AU (1) | AU497709B2 (es) |
| BE (1) | BE825379A (es) |
| CA (1) | CA1047644A (es) |
| CH (1) | CH592350A5 (es) |
| DE (1) | DE2503975A1 (es) |
| DK (1) | DK138567B (es) |
| ES (2) | ES434588A1 (es) |
| FR (1) | FR2260911B1 (es) |
| GB (1) | GB1501141A (es) |
| IT (1) | IT1031581B (es) |
| NL (1) | NL7401858A (es) |
| NO (1) | NO750416L (es) |
| SE (1) | SE410808B (es) |
| ZA (1) | ZA75131B (es) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2396378A1 (fr) * | 1977-06-28 | 1979-01-26 | Ibm | Disque d'enregistrement video et dispositif de reproduction en portant application |
| FR2422220A1 (fr) * | 1978-04-03 | 1979-11-02 | Philips Nv | Porteur d'enregistrement presentant une structure de phase a lire par voie optique et dispositif pour la lecture |
| FR2497990A1 (fr) * | 1981-01-12 | 1982-07-16 | Philips Nv | Porteur d'information presentant une structure d'information lisible par voie optique |
| EP0351953A2 (en) * | 1988-06-20 | 1990-01-24 | Mitsubishi Denki Kabushiki Kaisha | Optical head with a tilt correction servo mechanism |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7510035A (nl) * | 1975-08-26 | 1977-03-01 | Philips Nv | Registratiedrager met een optisch uitleesbare, langs sporen gerangschikte, informatiestruktuur en inrichting voor het uitlezen daarvan. |
| JPS5363002A (en) * | 1976-11-18 | 1978-06-06 | Sony Corp | Signal recording system and disk type medium for recording signal |
| JPS57103132A (en) * | 1980-12-16 | 1982-06-26 | Matsushita Electric Ind Co Ltd | Recording information carrier and its recorder and reproducer |
| GB8309447D0 (en) * | 1983-04-07 | 1983-05-11 | Combined Tech Corp Plc | Optical data storage |
| US4623784A (en) * | 1984-12-20 | 1986-11-18 | Drexler Technology Corporation | Laser recording apparatus with off-center lens and error detection |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3314052A (en) * | 1963-04-12 | 1967-04-11 | Ibm | Light modulation system |
| FR2014594B1 (es) * | 1968-07-15 | 1974-02-22 | Ibm | |
| JPS5117405B2 (es) * | 1972-05-15 | 1976-06-02 |
-
1974
- 1974-02-12 NL NL7401858A patent/NL7401858A/xx not_active Application Discontinuation
-
1975
- 1975-01-07 ZA ZA00750131A patent/ZA75131B/xx unknown
- 1975-01-31 DE DE19752503975 patent/DE2503975A1/de not_active Withdrawn
- 1975-02-06 CA CA219,532A patent/CA1047644A/en not_active Expired
- 1975-02-07 DK DK45475AA patent/DK138567B/da unknown
- 1975-02-07 GB GB5302/75A patent/GB1501141A/en not_active Expired
- 1975-02-10 NO NO750416A patent/NO750416L/no unknown
- 1975-02-10 AU AU78025/75A patent/AU497709B2/en not_active Expired
- 1975-02-10 IT IT20089/75A patent/IT1031581B/it active
- 1975-02-10 AT AT98275A patent/AT338889B/de not_active IP Right Cessation
- 1975-02-10 CH CH156575A patent/CH592350A5/xx not_active IP Right Cessation
- 1975-02-10 SE SE7501407A patent/SE410808B/xx unknown
- 1975-02-10 BE BE153229A patent/BE825379A/xx unknown
- 1975-02-10 ES ES434588A patent/ES434588A1/es not_active Expired
- 1975-02-12 FR FR7504326A patent/FR2260911B1/fr not_active Expired
- 1975-02-12 JP JP50017757A patent/JPS50119517A/ja active Pending
-
1976
- 1976-10-27 ES ES452770A patent/ES452770A1/es not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2396378A1 (fr) * | 1977-06-28 | 1979-01-26 | Ibm | Disque d'enregistrement video et dispositif de reproduction en portant application |
| FR2422220A1 (fr) * | 1978-04-03 | 1979-11-02 | Philips Nv | Porteur d'enregistrement presentant une structure de phase a lire par voie optique et dispositif pour la lecture |
| FR2497990A1 (fr) * | 1981-01-12 | 1982-07-16 | Philips Nv | Porteur d'information presentant une structure d'information lisible par voie optique |
| EP0351953A2 (en) * | 1988-06-20 | 1990-01-24 | Mitsubishi Denki Kabushiki Kaisha | Optical head with a tilt correction servo mechanism |
| EP0351953A3 (en) * | 1988-06-20 | 1992-09-30 | Mitsubishi Denki Kabushiki Kaisha | Optical head with a tilt correction servo mechanism |
| US5216649A (en) * | 1988-06-20 | 1993-06-01 | Mitsubishi Denki Kabushiki Kaisha | Optical head with a tilt correction servo mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2503975A1 (de) | 1975-08-14 |
| DK138567C (es) | 1979-03-05 |
| SE7501407L (es) | 1975-08-13 |
| CA1047644A (en) | 1979-01-30 |
| DK45475A (es) | 1975-10-06 |
| JPS50119517A (es) | 1975-09-19 |
| DK138567B (da) | 1978-09-25 |
| SE410808B (sv) | 1979-11-05 |
| AT338889B (de) | 1977-09-26 |
| ZA75131B (en) | 1976-08-25 |
| ES434588A1 (es) | 1977-03-16 |
| NL7401858A (nl) | 1975-08-14 |
| ATA98275A (de) | 1977-01-15 |
| AU497709B2 (en) | 1979-01-04 |
| GB1501141A (en) | 1978-02-15 |
| CH592350A5 (es) | 1977-10-31 |
| IT1031581B (it) | 1979-05-10 |
| FR2260911B1 (es) | 1982-03-05 |
| AU7802575A (en) | 1976-08-12 |
| BE825379A (fr) | 1975-08-11 |
| ES452770A1 (es) | 1977-10-01 |
| NO750416L (es) | 1975-08-13 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |