AT338889B - RECORDING CARRIER ON WHICH INFORMATION IS APPLIED IN AN OPTICALLY READABLE STRUCTURE, AND DEVICE FOR READING THIS INFORMATION - Google Patents
RECORDING CARRIER ON WHICH INFORMATION IS APPLIED IN AN OPTICALLY READABLE STRUCTURE, AND DEVICE FOR READING THIS INFORMATIONInfo
- Publication number
- AT338889B AT338889B AT98275A AT98275A AT338889B AT 338889 B AT338889 B AT 338889B AT 98275 A AT98275 A AT 98275A AT 98275 A AT98275 A AT 98275A AT 338889 B AT338889 B AT 338889B
- Authority
- AT
- Austria
- Prior art keywords
- information
- reading
- recording carrier
- optically readable
- readable structure
- Prior art date
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 (en) | 1974-02-12 | 1974-02-12 | REGISTRATION CARRIER ON WHICH INFORMATION IS INDICATED IN AN OPTICALLY READABLE STRUCTURE. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ATA98275A ATA98275A (en) | 1977-01-15 |
| AT338889B true AT338889B (en) | 1977-09-26 |
Family
ID=19820729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT98275A AT338889B (en) | 1974-02-12 | 1975-02-10 | RECORDING CARRIER ON WHICH INFORMATION IS APPLIED IN AN OPTICALLY READABLE STRUCTURE, AND DEVICE FOR READING THIS INFORMATION |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS50119517A (en) |
| AT (1) | AT338889B (en) |
| AU (1) | AU497709B2 (en) |
| BE (1) | BE825379A (en) |
| CA (1) | CA1047644A (en) |
| CH (1) | CH592350A5 (en) |
| DE (1) | DE2503975A1 (en) |
| DK (1) | DK138567B (en) |
| ES (2) | ES434588A1 (en) |
| FR (1) | FR2260911B1 (en) |
| GB (1) | GB1501141A (en) |
| IT (1) | IT1031581B (en) |
| NL (1) | NL7401858A (en) |
| NO (1) | NO750416L (en) |
| SE (1) | SE410808B (en) |
| ZA (1) | ZA75131B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7510035A (en) * | 1975-08-26 | 1977-03-01 | Philips Nv | REGISTRATION CARRIER WITH AN OPTICALLY READABLE, TRACK-SIZED, INFORMATION STRUCTURE AND DEVICE FOR READING THIS. |
| JPS5363002A (en) * | 1976-11-18 | 1978-06-06 | Sony Corp | Signal recording system and disk type medium for recording signal |
| US4161752A (en) * | 1977-06-28 | 1979-07-17 | International Business Machines Corporation | High density video disk having two pit depths |
| NL7803517A (en) * | 1978-04-03 | 1979-10-05 | Philips Nv | RECORD CARRIER WITH AN OPTICALLY READABLE PHASE STRUCTURE AND DEVICE FOR READING. |
| JPS57103132A (en) * | 1980-12-16 | 1982-06-26 | Matsushita Electric Ind Co Ltd | Recording information carrier and its recorder and reproducer |
| NL8100098A (en) * | 1981-01-12 | 1982-08-02 | Philips Nv | RECORD CARRIER WITH OPTICALLY READABLE INFORMATION STRUCTURE. |
| 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 |
| EP0351953B1 (en) * | 1988-06-20 | 1995-08-16 | Mitsubishi Denki Kabushiki Kaisha | Optical head with a tilt correction servo mechanism |
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 (en) * | 1968-07-15 | 1974-02-22 | Ibm | |
| JPS5117405B2 (en) * | 1972-05-15 | 1976-06-02 |
-
1974
- 1974-02-12 NL NL7401858A patent/NL7401858A/en not_active Application Discontinuation
-
1975
- 1975-01-07 ZA ZA00750131A patent/ZA75131B/en unknown
- 1975-01-31 DE DE19752503975 patent/DE2503975A1/en not_active Withdrawn
- 1975-02-06 CA CA219,532A patent/CA1047644A/en not_active Expired
- 1975-02-07 GB GB5302/75A patent/GB1501141A/en not_active Expired
- 1975-02-07 DK DK45475AA patent/DK138567B/en unknown
- 1975-02-10 IT IT20089/75A patent/IT1031581B/en active
- 1975-02-10 BE BE153229A patent/BE825379A/en unknown
- 1975-02-10 AT AT98275A patent/AT338889B/en not_active IP Right Cessation
- 1975-02-10 SE SE7501407A patent/SE410808B/en unknown
- 1975-02-10 AU AU78025/75A patent/AU497709B2/en not_active Expired
- 1975-02-10 CH CH156575A patent/CH592350A5/xx not_active IP Right Cessation
- 1975-02-10 NO NO750416A patent/NO750416L/no unknown
- 1975-02-10 ES ES434588A patent/ES434588A1/en not_active Expired
- 1975-02-12 JP JP50017757A patent/JPS50119517A/ja active Pending
- 1975-02-12 FR FR7504326A patent/FR2260911B1/fr not_active Expired
-
1976
- 1976-10-27 ES ES452770A patent/ES452770A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2260911A1 (en) | 1975-09-05 |
| CA1047644A (en) | 1979-01-30 |
| SE410808B (en) | 1979-11-05 |
| ZA75131B (en) | 1976-08-25 |
| NO750416L (en) | 1975-08-13 |
| DK138567B (en) | 1978-09-25 |
| AU7802575A (en) | 1976-08-12 |
| FR2260911B1 (en) | 1982-03-05 |
| NL7401858A (en) | 1975-08-14 |
| AU497709B2 (en) | 1979-01-04 |
| JPS50119517A (en) | 1975-09-19 |
| CH592350A5 (en) | 1977-10-31 |
| DE2503975A1 (en) | 1975-08-14 |
| ES434588A1 (en) | 1977-03-16 |
| BE825379A (en) | 1975-08-11 |
| ES452770A1 (en) | 1977-10-01 |
| IT1031581B (en) | 1979-05-10 |
| GB1501141A (en) | 1978-02-15 |
| ATA98275A (en) | 1977-01-15 |
| DK138567C (en) | 1979-03-05 |
| SE7501407L (en) | 1975-08-13 |
| DK45475A (en) | 1975-10-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ELJ | Ceased due to non-payment of the annual fee | ||
| UEP | Publication of translation of european patent specification | ||
| REN | Ceased due to non-payment of the annual fee |