DK138567C - - Google Patents
Info
- Publication number
- DK138567C DK138567C DK45475A DK45475A DK138567C DK 138567 C DK138567 C DK 138567C DK 45475 A DK45475 A DK 45475A DK 45475 A DK45475 A DK 45475A DK 138567 C DK138567 C DK 138567C
- Authority
- DK
- Denmark
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 (3)
| Publication Number | Publication Date |
|---|---|
| DK45475A DK45475A (en) | 1975-10-06 |
| DK138567B DK138567B (en) | 1978-09-25 |
| DK138567C true DK138567C (en) | 1979-03-05 |
Family
ID=19820729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK45475AA DK138567B (en) | 1974-02-12 | 1975-02-07 | Registration carrier on which information is registered in an optically readable structure, as well as apparatus for reading such a registration carrier. |
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 |
| DE68923833T2 (en) * | 1988-06-20 | 1996-06-13 | Mitsubishi Electric Corp | Optical head with tilt correction servomechanism. |
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 DK DK45475AA patent/DK138567B/en unknown
- 1975-02-07 GB GB5302/75A patent/GB1501141A/en not_active Expired
- 1975-02-10 IT IT20089/75A patent/IT1031581B/en active
- 1975-02-10 AT AT98275A patent/AT338889B/en 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
- 1975-02-10 SE SE7501407A patent/SE410808B/en unknown
- 1975-02-10 AU AU78025/75A patent/AU497709B2/en not_active Expired
- 1975-02-10 BE BE153229A patent/BE825379A/en unknown
- 1975-02-10 CH CH156575A patent/CH592350A5/xx not_active IP Right Cessation
- 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 |
|---|---|
| NO750416L (en) | 1975-08-13 |
| ATA98275A (en) | 1977-01-15 |
| GB1501141A (en) | 1978-02-15 |
| DK138567B (en) | 1978-09-25 |
| JPS50119517A (en) | 1975-09-19 |
| CA1047644A (en) | 1979-01-30 |
| AT338889B (en) | 1977-09-26 |
| CH592350A5 (en) | 1977-10-31 |
| DK45475A (en) | 1975-10-06 |
| ZA75131B (en) | 1976-08-25 |
| ES452770A1 (en) | 1977-10-01 |
| IT1031581B (en) | 1979-05-10 |
| ES434588A1 (en) | 1977-03-16 |
| AU7802575A (en) | 1976-08-12 |
| SE410808B (en) | 1979-11-05 |
| FR2260911A1 (en) | 1975-09-05 |
| BE825379A (en) | 1975-08-11 |
| NL7401858A (en) | 1975-08-14 |
| FR2260911B1 (en) | 1982-03-05 |
| SE7501407L (en) | 1975-08-13 |
| DE2503975A1 (en) | 1975-08-14 |
| AU497709B2 (en) | 1979-01-04 |