IT1031581B - RECORDING DEVICE ON WHICH INFORMATION IS STORED ACCORDING TO AN OPTICALLY READABLE STRUCTURE AND EQUIPMENT FOR READING IT - Google Patents
RECORDING DEVICE ON WHICH INFORMATION IS STORED ACCORDING TO AN OPTICALLY READABLE STRUCTURE AND EQUIPMENT FOR READING ITInfo
- Publication number
- IT1031581B IT1031581B IT20089/75A IT2008975A IT1031581B IT 1031581 B IT1031581 B IT 1031581B IT 20089/75 A IT20089/75 A IT 20089/75A IT 2008975 A IT2008975 A IT 2008975A IT 1031581 B IT1031581 B IT 1031581B
- Authority
- IT
- Italy
- Prior art keywords
- reading
- equipment
- information
- recording device
- stored according
- 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 (1)
| Publication Number | Publication Date |
|---|---|
| IT1031581B true IT1031581B (en) | 1979-05-10 |
Family
ID=19820729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT20089/75A IT1031581B (en) | 1974-02-12 | 1975-02-10 | RECORDING DEVICE ON WHICH INFORMATION IS STORED ACCORDING TO AN OPTICALLY READABLE STRUCTURE AND EQUIPMENT FOR READING IT |
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 |
| DE1932164B2 (en) * | 1968-07-15 | 1972-04-06 | International Business Machines Corp , Armonk, NY (V St A ) | PROCESS FOR INSERTING METAL IN PART AREAS OF A SUBSTRATE ESPECIALLY CONSISTING OF SEMICONDUCTOR MATERIAL |
| 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 SE SE7501407A patent/SE410808B/en unknown
- 1975-02-10 IT IT20089/75A patent/IT1031581B/en active
- 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 AT AT98275A patent/AT338889B/en not_active IP Right Cessation
- 1975-02-10 NO NO750416A patent/NO750416L/no unknown
- 1975-02-10 BE BE153229A patent/BE825379A/en unknown
- 1975-02-10 ES ES434588A patent/ES434588A1/en 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/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2503975A1 (en) | 1975-08-14 |
| SE410808B (en) | 1979-11-05 |
| ATA98275A (en) | 1977-01-15 |
| DK45475A (en) | 1975-10-06 |
| CA1047644A (en) | 1979-01-30 |
| FR2260911B1 (en) | 1982-03-05 |
| DK138567B (en) | 1978-09-25 |
| SE7501407L (en) | 1975-08-13 |
| AT338889B (en) | 1977-09-26 |
| ES452770A1 (en) | 1977-10-01 |
| DK138567C (en) | 1979-03-05 |
| AU7802575A (en) | 1976-08-12 |
| ZA75131B (en) | 1976-08-25 |
| ES434588A1 (en) | 1977-03-16 |
| CH592350A5 (en) | 1977-10-31 |
| NL7401858A (en) | 1975-08-14 |
| NO750416L (en) | 1975-08-13 |
| GB1501141A (en) | 1978-02-15 |
| JPS50119517A (en) | 1975-09-19 |
| BE825379A (en) | 1975-08-11 |
| FR2260911A1 (en) | 1975-09-05 |
| AU497709B2 (en) | 1979-01-04 |
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