IT990422B - Supporto di informazione registrata su disco a struttura ottica - Google Patents
Supporto di informazione registrata su disco a struttura otticaInfo
- Publication number
- IT990422B IT990422B IT52241/73A IT5224173A IT990422B IT 990422 B IT990422 B IT 990422B IT 52241/73 A IT52241/73 A IT 52241/73A IT 5224173 A IT5224173 A IT 5224173A IT 990422 B IT990422 B IT 990422B
- Authority
- IT
- Italy
- Prior art keywords
- optical structure
- information support
- structure disk
- support recorded
- recorded
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
-
- 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
- G11B7/0908—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 for focusing only
- G11B7/0914—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 for focusing only by non-optical methods, e.g. capacitive
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7211998A NL7211998A (it) | 1972-09-02 | 1972-09-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT990422B true IT990422B (it) | 1975-06-20 |
Family
ID=19816848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT52241/73A IT990422B (it) | 1972-09-02 | 1973-08-30 | Supporto di informazione registrata su disco a struttura ottica |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US3873763A (it) |
| JP (1) | JPS5330452B2 (it) |
| AT (1) | AT341014B (it) |
| AU (1) | AU474742B2 (it) |
| BE (1) | BE804330A (it) |
| CA (1) | CA1019832A (it) |
| CH (1) | CH576684A5 (it) |
| ES (1) | ES418386A1 (it) |
| FR (1) | FR2198335A1 (it) |
| GB (1) | GB1441769A (it) |
| IT (1) | IT990422B (it) |
| NL (1) | NL7211998A (it) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL164688C (nl) * | 1973-10-15 | 1981-01-15 | Mca Disco Vision | Werkwijze voor de vervaardiging van een videoschijf waarbij uitgaande van een moedermatrijs eerst een vorm wordt vervaardigd. |
| JPS5161725A (it) * | 1974-11-27 | 1976-05-28 | Nippon Musical Instruments Mfg | |
| JPS5161724A (it) * | 1974-11-27 | 1976-05-28 | Nippon Musical Instruments Mfg | |
| FR2294451A1 (fr) * | 1974-12-09 | 1976-07-09 | Anvar | Dispositif pour mesurer des quantites de charges electriques |
| NL182257C (nl) * | 1974-12-23 | 1988-02-01 | Philips Nv | Inrichting voor het uitlezen van een vlakke reflekterende registratiedrager waarop informatie is aangebracht in een optisch uitleesbare struktuur. |
| US3932701A (en) * | 1975-01-29 | 1976-01-13 | Zenith Radio Corporation | Self-compensating focus system for a reflective video disc |
| US3959581A (en) * | 1975-01-29 | 1976-05-25 | Zenith Radio Corporation | Self-compensating focus system for optical video playback device |
| JPS598892B2 (ja) * | 1975-06-19 | 1984-02-28 | ソニー株式会社 | 信号の光学的記録再生装置 |
| US4183060A (en) * | 1976-03-19 | 1980-01-08 | Rca Corporation | Capacitance distance sensor apparatus for video disc player/recorder |
| GB1577132A (en) * | 1976-03-19 | 1980-10-22 | Rca Corp | Compensation apparatus for a servo system with periodic command signals |
| GB1577134A (en) * | 1976-03-19 | 1980-10-22 | Rca Corp | Capacitance distance control apparatus |
| JPS52120805A (en) * | 1976-04-02 | 1977-10-11 | Sony Corp | Servo apparatus |
| US4161752A (en) * | 1977-06-28 | 1979-07-17 | International Business Machines Corporation | High density video disk having two pit depths |
| NL7904724A (nl) * | 1979-06-18 | 1980-12-22 | Philips Nv | Optische aftastinrichting met fokusseerstelsel. |
| US4285056A (en) * | 1979-10-17 | 1981-08-18 | Rca Corporation | Replicable optical recording medium |
| US4323998A (en) * | 1980-08-21 | 1982-04-06 | Rca Corporation | Video disc locked groove corrector |
| CA1192307A (en) * | 1982-06-21 | 1985-08-20 | Anthony J. East | Erasable optical recording medium |
| CA1192662A (en) * | 1982-06-21 | 1985-08-27 | James E. Kuder | Erasable recording medium comprising a dimer acid polyamide resin |
| US4931887A (en) * | 1988-02-01 | 1990-06-05 | International Business Machines Corporation | Capacitive measurement and control of the fly height of a recording slider |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1917003A (en) * | 1929-01-21 | 1933-07-04 | Columbia Phono Graph Company I | Reproduction of sound records |
| US1967882A (en) * | 1929-08-01 | 1934-07-24 | Jr John Hays Hammond | Photo-electric system for recording and reproducing sound |
| US2034803A (en) * | 1934-11-09 | 1936-03-24 | Wallace W Fuller | Method of and apparatus for producing intelligible sound from optical indicia |
| US2654810A (en) * | 1949-11-15 | 1953-10-06 | Miessner Inventions Inc | Photoelectric translating system |
| US3198880A (en) * | 1952-09-03 | 1965-08-03 | Hall William D | Photographic disc reproduction of television signals |
| DE1903822C3 (de) * | 1969-01-23 | 1973-12-13 | Ted Bildplatten Ag Aeg-Telefunkenteldec, Zug (Schweiz) | Vorrichtung zur Wiedergabe auf einem Trager gespeicherter Signale, Aufzeichnungs verfahren für einen Trager sowie Trager zur Wiedergabe mit der Vorrichtung |
| US3688025A (en) * | 1970-10-27 | 1972-08-29 | Rca Corp | Recorder and playback apparatus for pulse width modulated record |
-
1972
- 1972-09-02 NL NL7211998A patent/NL7211998A/xx not_active Application Discontinuation
-
1973
- 1973-03-26 US US344701A patent/US3873763A/en not_active Expired - Lifetime
- 1973-08-29 FR FR7331191A patent/FR2198335A1/fr not_active Withdrawn
- 1973-08-29 AU AU59752/73A patent/AU474742B2/en not_active Expired
- 1973-08-30 CA CA180,001A patent/CA1019832A/en not_active Expired
- 1973-08-30 AT AT755873A patent/AT341014B/de not_active IP Right Cessation
- 1973-08-30 CH CH1246573A patent/CH576684A5/xx not_active IP Right Cessation
- 1973-08-30 JP JP9674873A patent/JPS5330452B2/ja not_active Expired
- 1973-08-30 IT IT52241/73A patent/IT990422B/it active
- 1973-08-31 BE BE135213A patent/BE804330A/xx unknown
- 1973-08-31 ES ES418386A patent/ES418386A1/es not_active Expired
- 1973-08-31 GB GB4111373A patent/GB1441769A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2341339B2 (de) | 1977-02-10 |
| AT341014B (de) | 1978-01-10 |
| BE804330A (fr) | 1974-02-28 |
| ATA755873A (de) | 1977-05-15 |
| AU474742B2 (en) | 1976-07-29 |
| JPS4965725A (it) | 1974-06-26 |
| CH576684A5 (it) | 1976-06-15 |
| DE2341339A1 (de) | 1974-03-14 |
| ES418386A1 (es) | 1976-09-01 |
| GB1441769A (en) | 1976-07-07 |
| AU5975273A (en) | 1975-03-06 |
| JPS5330452B2 (it) | 1978-08-26 |
| US3873763A (en) | 1975-03-25 |
| FR2198335A1 (it) | 1974-03-29 |
| NL7211998A (it) | 1974-03-05 |
| CA1019832A (en) | 1977-10-25 |
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