IT1031581B - Dispositivo di registrazione sulquale vengono immagazzinate informazioni secondo una struttura leggibile per via ottica ed apparecchiatura per effettuarne la lettura - Google Patents
Dispositivo di registrazione sulquale vengono immagazzinate informazioni secondo una struttura leggibile per via ottica ed apparecchiatura per effettuarne la letturaInfo
- 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 (nl) | 1974-02-12 | 1974-02-12 | Registratiedrager waarop informatie is aange- t in een optisch uitleesbare struktuur. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1031581B true IT1031581B (it) | 1979-05-10 |
Family
ID=19820729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT20089/75A IT1031581B (it) | 1974-02-12 | 1975-02-10 | Dispositivo di registrazione sulquale vengono immagazzinate informazioni secondo una struttura leggibile per via ottica ed apparecchiatura per effettuarne la lettura |
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) |
Families Citing this family (9)
| 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 |
| US4161752A (en) * | 1977-06-28 | 1979-07-17 | International Business Machines Corporation | High density video disk having two pit depths |
| NL7803517A (nl) * | 1978-04-03 | 1979-10-05 | Philips Nv | Registratiedrager met een optisch uitleesbare fase- struktuur en inrichting voor het uitlezen. |
| JPS57103132A (en) * | 1980-12-16 | 1982-06-26 | Matsushita Electric Ind Co Ltd | Recording information carrier and its recorder and reproducer |
| NL8100098A (nl) * | 1981-01-12 | 1982-08-02 | Philips Nv | Registratiedrager met optisch uitleesbare informatiestruktuur. |
| 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 (de) * | 1988-06-20 | 1996-06-13 | Mitsubishi Electric Corp | Optischer Kopf mit Kippkorrekturservomechanismus. |
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 IT IT20089/75A patent/IT1031581B/it active
- 1975-02-10 AT AT98275A patent/AT338889B/de not_active IP Right Cessation
- 1975-02-10 NO NO750416A patent/NO750416L/no unknown
- 1975-02-10 ES ES434588A patent/ES434588A1/es not_active Expired
- 1975-02-10 SE SE7501407A patent/SE410808B/xx unknown
- 1975-02-10 AU AU78025/75A patent/AU497709B2/en not_active Expired
- 1975-02-10 BE BE153229A patent/BE825379A/xx 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/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NO750416L (es) | 1975-08-13 |
| ATA98275A (de) | 1977-01-15 |
| GB1501141A (en) | 1978-02-15 |
| DK138567B (da) | 1978-09-25 |
| JPS50119517A (es) | 1975-09-19 |
| CA1047644A (en) | 1979-01-30 |
| AT338889B (de) | 1977-09-26 |
| CH592350A5 (es) | 1977-10-31 |
| DK45475A (es) | 1975-10-06 |
| DK138567C (es) | 1979-03-05 |
| ZA75131B (en) | 1976-08-25 |
| ES452770A1 (es) | 1977-10-01 |
| ES434588A1 (es) | 1977-03-16 |
| AU7802575A (en) | 1976-08-12 |
| SE410808B (sv) | 1979-11-05 |
| FR2260911A1 (es) | 1975-09-05 |
| BE825379A (fr) | 1975-08-11 |
| NL7401858A (nl) | 1975-08-14 |
| FR2260911B1 (es) | 1982-03-05 |
| SE7501407L (es) | 1975-08-13 |
| DE2503975A1 (de) | 1975-08-14 |
| AU497709B2 (en) | 1979-01-04 |
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