IT1111540B - Metodo,apparato e corpo di supporto di registrazioni per la registrazione ottica di informazioni - Google Patents
Metodo,apparato e corpo di supporto di registrazioni per la registrazione ottica di informazioniInfo
- Publication number
- IT1111540B IT1111540B IT20944/79A IT2094479A IT1111540B IT 1111540 B IT1111540 B IT 1111540B IT 20944/79 A IT20944/79 A IT 20944/79A IT 2094479 A IT2094479 A IT 2094479A IT 1111540 B IT1111540 B IT 1111540B
- Authority
- IT
- Italy
- Prior art keywords
- recordings
- information
- support body
- optical recording
- recording
- 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
- G11B7/0045—Recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/005—Programmed access to indexed parts of tracks of operating discs, by guiding the disc
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/36—Monitoring, i.e. supervising the progress of recording or 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
- G11B7/0901—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 track following only
- G11B7/0904—Dithered tracking systems
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/127—Lasers; Multiple laser arrays
-
- 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
- G11B7/0045—Recording
- G11B7/00451—Recording involving ablation of the recording layer
-
- 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
- G11B7/0045—Recording
- G11B7/00455—Recording involving reflectivity, absorption or colour changes
-
- 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
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/00745—Sectoring or header formats within a track
-
- 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
-
- 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
-
- 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
- G11B7/0916—Foucault or knife-edge methods
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
-
- 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
- G11B7/24073—Tracks
- G11B7/24082—Meandering
-
- 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
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
- G11B7/261—Preparing a master, e.g. exposing photoresist, electroforming
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NLAANVRAGE7802859,A NL187413C (nl) | 1978-03-16 | 1978-03-16 | Registratiedragerlichaam, ingeschreven registratiedrager, werkwijze voor het inschrijven van het registratiedragerlichaam en inrichting voor het uitvoeren van de werkwijze en voor het uitlezen van een ingeschreven registratiedrager. |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7920944A0 IT7920944A0 (it) | 1979-03-13 |
IT1111540B true IT1111540B (it) | 1986-01-13 |
Family
ID=19830503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT20944/79A IT1111540B (it) | 1978-03-16 | 1979-03-13 | Metodo,apparato e corpo di supporto di registrazioni per la registrazione ottica di informazioni |
Country Status (14)
Country | Link |
---|---|
US (1) | US4363116A (it) |
JP (4) | JPS54130102A (it) |
AT (1) | AT372798B (it) |
AU (1) | AU535698B2 (it) |
BE (1) | BE874917A (it) |
CA (1) | CA1147058A (it) |
CH (2) | CH648947A5 (it) |
DE (1) | DE2909877C2 (it) |
ES (1) | ES478608A1 (it) |
FR (1) | FR2420182B1 (it) |
GB (1) | GB2016744B (it) |
IT (1) | IT1111540B (it) |
NL (1) | NL187413C (it) |
SE (2) | SE439706B (it) |
Families Citing this family (180)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA744836B (en) * | 1973-08-16 | 1975-08-27 | Hoechst Ag | Process for obtaining multicolor effects |
NL7802860A (nl) * | 1978-03-16 | 1979-09-18 | Philips Nv | Registratiedragerlichaam en registratiedrager voor optische informatie en inrichting voor het inschrijven en uitlezen. |
JPS54133305A (en) * | 1978-04-07 | 1979-10-17 | Hitachi Ltd | Information recorder |
NL7811004A (nl) * | 1978-11-06 | 1980-05-08 | Philips Nv | Stelsel met woordsynchronisatie voor een serieele signaalreeks. |
CA1165871A (en) * | 1978-11-08 | 1984-04-17 | Kornelis Bulthuis | Optically inscribable record carrier |
JPS55113197A (en) * | 1979-02-23 | 1980-09-01 | Hitachi Ltd | Optical memory unit |
NL7902363A (nl) * | 1979-03-27 | 1980-09-30 | Philips Nv | Registratiedrager met een optisch uitleesbare informa- tiestruktuur. |
US4283777A (en) * | 1979-05-14 | 1981-08-11 | Xerox Corporation | Optical memory having a parallel read out |
US4290122A (en) * | 1979-05-14 | 1981-09-15 | Xerox Corporation | Self-synchronizing clock source for optical memories |
JPS56148739A (en) * | 1980-04-16 | 1981-11-18 | Hitachi Ltd | Optical information processing unit |
NL7906576A (nl) * | 1979-09-03 | 1981-03-05 | Philips Nv | Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur, alsmede uitleesinrichting daarvoor. |
NL7907180A (nl) * | 1979-09-27 | 1981-03-31 | Philips Nv | Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur, alsmede inrichting voor het uitlezen daarvan. |
NL8000121A (nl) * | 1980-01-09 | 1981-08-03 | Philips Nv | Schijfvormige, optische uitleesbare registratiedrager als opslagmedium voor datainformatie, inrichting voor het vervaardigen van zo'n registratiedrager, inrichting voor het optekenen van datainformatie in zo'n registratiedrager en inrichting voor het uitlezen van zo'n registratiedrager. |
NL8000124A (nl) * | 1980-01-09 | 1981-08-03 | Philips Nv | Inrichting voor het weergeven van digitaal gecodeerde informatie die op een optisch uitleesbare schijfvormige registratiedrager is aangebracht. |
NL8000122A (nl) * | 1980-01-09 | 1981-08-03 | Philips Nv | Schijfvormige, optisch uitleesbare registratiedrager als opslagmedium voor datainformatie, inrichting voor het vervaardigen van zo'n registratiedrager, inrichting voor het optekenen en/of weergeven van datainformatie in c.q. van zo'n registratiedrager. |
NL8000123A (nl) * | 1980-01-09 | 1981-08-03 | Philips Nv | Inrichting voor het schrijven van digitale informatie in een schijfvormige optisch uitleesbare registratiedrager. |
US4408314A (en) * | 1980-02-29 | 1983-10-04 | Tokyo Shibaura Denki Kabushiki Kaisha | Record/playback track tracking servo |
JPS56163534A (en) * | 1980-05-20 | 1981-12-16 | Matsushita Electric Ind Co Ltd | Optical information recording carrier |
JPS573233A (en) * | 1980-06-06 | 1982-01-08 | Toshiba Corp | Detecting method for track on optical disk |
JPS5715235A (en) * | 1980-07-03 | 1982-01-26 | Matsushita Electric Ind Co Ltd | Manufacture of member for optical information recording and reproduction |
NL8004598A (nl) * | 1980-08-14 | 1982-03-16 | Philips Nv | Werkwijze voor het inschrijven in, respektievelijk uitlezen uit, een registratiedragerlichaam, van sektorsgewijs georganiseerde informatie, en inrichting daarvoor. |
US4484319A (en) * | 1980-09-19 | 1984-11-20 | Matsushita Electric Industrial Co., Ltd. | Apparatus for locating a track on disc-like optical information carriers |
NL8006165A (nl) * | 1980-11-12 | 1982-06-01 | Philips Nv | Systeem voor het overdragen van digitale informatie, codeerinrichting voor toepassing in dat systeem, decodeerinrichting voor toepassing in dat systeem en registratiedrager voor toepassing in dat systeem. |
JPS5784674A (en) * | 1980-11-14 | 1982-05-27 | Konishiroku Photo Ind Co Ltd | Recorder |
US5119363A (en) * | 1980-12-17 | 1992-06-02 | Matsushita Electric Industrial Company, Ltd. | Optical disk having an index mark |
JPS57103136A (en) * | 1980-12-17 | 1982-06-26 | Matsushita Electric Ind Co Ltd | Optical disk and optical disk device |
JPS57103134A (en) * | 1980-12-17 | 1982-06-26 | Matsushita Electric Ind Co Ltd | Optical disk |
JPS57130240A (en) * | 1981-02-05 | 1982-08-12 | Olympus Optical Co Ltd | Optical information recording and reproducing device and information recording medium for it |
JPS57150144A (en) * | 1981-03-10 | 1982-09-16 | Matsushita Electric Ind Co Ltd | Optical recorder and reproducer |
US4523304A (en) * | 1981-04-17 | 1985-06-11 | Matsushita Electric Industrial Co., Ltd. | Optical data recording and reproducing apparatus |
FR2504713B1 (fr) * | 1981-04-27 | 1986-04-11 | Thomson Csf | Disque support d'information a codage angulaire et systeme d'entrainement en rotation d'un tel disque |
JPS57181429A (en) * | 1981-05-01 | 1982-11-08 | Toshiba Corp | Optical disc device |
JPS57208647A (en) * | 1981-06-18 | 1982-12-21 | Toshiba Corp | Optical disk for recording of information |
JPS58158051A (ja) * | 1982-03-15 | 1983-09-20 | Toshiba Corp | 光学的記録再生装置 |
US4464567A (en) * | 1981-06-30 | 1984-08-07 | Storage Technology Corporation | Photoelectric information and focus detector |
JPS5819744A (ja) * | 1981-07-24 | 1983-02-04 | Sony Corp | 光学式記録再生装置 |
US4497050A (en) * | 1981-08-03 | 1985-01-29 | U.S. Philips Corporation | Method and device for writing a data block into a record carrier body |
JPS5832236A (ja) * | 1981-08-18 | 1983-02-25 | Matsushita Electric Ind Co Ltd | 光学的記録再生装置 |
JPS5857636A (ja) * | 1981-09-30 | 1983-04-05 | Fujitsu Ltd | 光デイスクのトラツキング制御方式 |
JPS5857643A (ja) * | 1981-09-30 | 1983-04-05 | Sony Corp | 記録用デイスク |
JPS5856337U (ja) * | 1981-10-13 | 1983-04-16 | 大日本印刷株式会社 | 情報記録用カ−ド |
US4417330A (en) * | 1981-10-15 | 1983-11-22 | Burroughs Corporation | Optical memory system providing improved focusing control |
NL8204555A (nl) * | 1981-11-25 | 1983-06-16 | Hitachi Ltd | Inrichting voor het registreren en weergeven van informatie. |
JPS58102347A (ja) * | 1981-12-11 | 1983-06-17 | Mitsubishi Electric Corp | 光デイスク記録担体 |
US4428075A (en) * | 1981-12-21 | 1984-01-24 | Burroughs Corporation | Methods of preformatting an optical disk |
US4556964A (en) * | 1981-12-21 | 1985-12-03 | Burroughs Corporation | Technique for monitoring galvo angle |
US4466088A (en) * | 1981-12-21 | 1984-08-14 | Burroughs Corporation | Galvo position sensor for track selection in optical data disk system |
US4489406A (en) * | 1982-02-17 | 1984-12-18 | Burroughs Corporation | Optical memory system having a short seek capability |
US4432083A (en) * | 1982-02-17 | 1984-02-14 | Burroughs Corporation | Optical memory system having track following |
US4435797A (en) | 1982-02-17 | 1984-03-06 | Burroughs Corporation | Optical memory system having track following and seeking capabilities |
US4432082A (en) * | 1982-02-17 | 1984-02-14 | Burroughs Corporation | Optical memory system having a long seek capability |
FR2523347B1 (fr) * | 1982-03-12 | 1988-11-04 | Thomson Csf | Support d'information mobile pregrave et dispositif optique de suivi de piste mettant en oeuvre un tel support |
FR2523349A1 (fr) * | 1982-03-12 | 1983-09-16 | Thomson Csf | Procede et dispositif optique de generation de signaux d'asservissements de la position d'une tache d'exploration des pistes d'un support d'information |
FR2523345A1 (fr) * | 1982-03-12 | 1983-09-16 | Thomson Csf | Procede et dispositif de generation de signaux de synchronisation dans un appareil optique d'ecriture-lecture de support d'information |
JPS58158038A (ja) * | 1982-03-15 | 1983-09-20 | Toshiba Corp | 光デイスク装置 |
USRE32937E (en) * | 1982-03-19 | 1989-05-30 | Magnetic Peripherals, Inc. | Modulation system for optical recording |
US4456981A (en) * | 1982-03-19 | 1984-06-26 | Magnetic Peripherals Inc. | Modulation system for optical recording |
JPS58181163A (ja) * | 1982-04-16 | 1983-10-22 | Hitachi Ltd | 記憶装置の制御方式 |
JPS58165742U (ja) * | 1982-04-27 | 1983-11-04 | 株式会社東芝 | 光学式情報記憶媒体 |
JPS58189840A (ja) * | 1982-04-30 | 1983-11-05 | Hitachi Ltd | 光学的情報処理装置 |
JPS58210775A (ja) * | 1982-06-02 | 1983-12-08 | Victor Co Of Japan Ltd | テレビジヨン映像信号の記録再生方式 |
US4519054A (en) * | 1982-06-03 | 1985-05-21 | News Log International, Inc. | Method for formatting optically encoded digital data on a substrate and the data record carrier formed thereby |
US4517667A (en) * | 1982-06-10 | 1985-05-14 | Xerox Corporation | Direct read after write optical disk system |
EP0098076A1 (en) * | 1982-06-14 | 1984-01-11 | Nec Corporation | Beam access apparatus for optical disc system |
US4633451A (en) * | 1982-06-30 | 1986-12-30 | International Business Machines Corporation | Optical servo for magnetic disks |
JPS5919250A (ja) * | 1982-07-21 | 1984-01-31 | Hitachi Ltd | 情報の記録再生装置 |
US4642803A (en) * | 1982-08-09 | 1987-02-10 | Drexler Technology Corporation | Optical data retrieval system for multi-characteristic reflective data storage media |
EP0100995A3 (en) * | 1982-08-10 | 1985-10-16 | Kabushiki Kaisha Toshiba | Optical disk |
US4621353A (en) * | 1982-09-09 | 1986-11-04 | Burroughs Corporation | Optical memory system providing improved focusing control and improved beam combining and separating apparatus |
US4559622A (en) * | 1982-09-09 | 1985-12-17 | Burroughs Corporation | Optical memory system providing improved focus detection and control by detecting reflected beam diameter variations at spaced predetermined locations in the system |
US4622659A (en) * | 1982-09-09 | 1986-11-11 | Burroughs Corporation | Focus detection and control apparatus for maintaining accurate focusing in an optical memory system by detecting reflected beam diameter variations at spaced predetermined locations |
JPS5977648A (ja) * | 1982-10-26 | 1984-05-04 | Sharp Corp | 光磁気記憶素子 |
US4490730A (en) * | 1982-10-28 | 1984-12-25 | The Charles Stark Draper Laboratory, Inc. | Pulsed optical storage system |
US4700335A (en) * | 1983-01-31 | 1987-10-13 | Canon Kabushiki Kaisha | Method and apparatus for recording a continuous spiral information track with different track pitches |
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-
1978
- 1978-03-16 NL NLAANVRAGE7802859,A patent/NL187413C/xx not_active IP Right Cessation
-
1979
- 1979-03-12 CA CA000323250A patent/CA1147058A/en not_active Expired
- 1979-03-13 GB GB7908771A patent/GB2016744B/en not_active Expired
- 1979-03-13 SE SE7902222A patent/SE439706B/sv not_active IP Right Cessation
- 1979-03-13 CH CH2381/79A patent/CH648947A5/de not_active IP Right Cessation
- 1979-03-13 CH CH248/85A patent/CH664452A5/de not_active IP Right Cessation
- 1979-03-13 AU AU45078/79A patent/AU535698B2/en not_active Ceased
- 1979-03-13 IT IT20944/79A patent/IT1111540B/it active
- 1979-03-14 DE DE2909877A patent/DE2909877C2/de not_active Expired
- 1979-03-14 ES ES478608A patent/ES478608A1/es not_active Expired
- 1979-03-15 AT AT0197779A patent/AT372798B/de not_active IP Right Cessation
- 1979-03-16 BE BE194082A patent/BE874917A/xx not_active IP Right Cessation
- 1979-03-16 JP JP3166079A patent/JPS54130102A/ja active Granted
- 1979-03-16 FR FR7906752A patent/FR2420182B1/fr not_active Expired
-
1980
- 1980-04-14 US US06/140,409 patent/US4363116A/en not_active Expired - Lifetime
-
1985
- 1985-02-15 SE SE8500720A patent/SE455350B/sv not_active IP Right Cessation
-
1987
- 1987-01-16 JP JP62006261A patent/JPS62167623A/ja active Pending
- 1987-01-16 JP JP62006260A patent/JPS62167622A/ja active Granted
- 1987-01-16 JP JP62006262A patent/JPS62167627A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
BE874917A (fr) | 1979-09-17 |
JPS62167627A (ja) | 1987-07-24 |
CA1147058A (en) | 1983-05-24 |
CH648947A5 (de) | 1985-04-15 |
GB2016744B (en) | 1982-08-04 |
DE2909877C2 (de) | 1987-04-16 |
SE7902222L (sv) | 1979-09-17 |
GB2016744A (en) | 1979-09-26 |
SE8500720L (sv) | 1985-02-15 |
CH664452A5 (de) | 1988-02-29 |
IT7920944A0 (it) | 1979-03-13 |
SE455350B (sv) | 1988-07-04 |
SE8500720D0 (sv) | 1985-02-15 |
AU4507879A (en) | 1979-09-20 |
ATA197779A (de) | 1983-03-15 |
SE439706B (sv) | 1985-06-24 |
AT372798B (de) | 1983-11-10 |
FR2420182A1 (fr) | 1979-10-12 |
US4363116A (en) | 1982-12-07 |
FR2420182B1 (fr) | 1988-06-24 |
JPS54130102A (en) | 1979-10-09 |
JPS6319934B2 (it) | 1988-04-25 |
AU535698B2 (en) | 1984-04-05 |
JPS6333211B2 (it) | 1988-07-04 |
JPS62167622A (ja) | 1987-07-24 |
DE2909877A1 (de) | 1979-09-27 |
NL7802859A (nl) | 1979-09-18 |
NL187413C (nl) | 1991-09-16 |
JPS62167623A (ja) | 1987-07-24 |
ES478608A1 (es) | 1980-05-16 |
NL187413B (nl) | 1991-04-16 |
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