IT1074335B - Apparecchiatura per la lettura di un supporto di registrazione con una struttura d'informazione atta ad essere letta otticamente - Google Patents
Apparecchiatura per la lettura di un supporto di registrazione con una struttura d'informazione atta ad essere letta otticamenteInfo
- Publication number
- IT1074335B IT1074335B IT19598/77A IT1959877A IT1074335B IT 1074335 B IT1074335 B IT 1074335B IT 19598/77 A IT19598/77 A IT 19598/77A IT 1959877 A IT1959877 A IT 1959877A IT 1074335 B IT1074335 B IT 1074335B
- Authority
- IT
- Italy
- Prior art keywords
- reading
- recording media
- structure suitable
- information structure
- optically read
- 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
- G11B7/08—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
- G11B7/0906—Differential phase difference systems
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
- G11B11/1053—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed to compensate for the magnetic domain drift or time shift
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10532—Heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
-
- 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
- G11B7/0946—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 specially adapted for operation during external perturbations not related to the carrier or servo beam, e.g. vibration
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/7605—Television signal recording on discs or drums
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
- Holo Graphy (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NLAANVRAGE7600842,A NL182258C (nl) | 1976-01-28 | 1976-01-28 | Inrichting voor het uitlezen van een vlakke registratiedrager met een optisch uitleesbare informatiestructuur. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1074335B true IT1074335B (it) | 1985-04-20 |
Family
ID=19825526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT19598/77A IT1074335B (it) | 1976-01-28 | 1977-01-25 | Apparecchiatura per la lettura di un supporto di registrazione con una struttura d'informazione atta ad essere letta otticamente |
Country Status (21)
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6038771B2 (ja) * | 1978-06-19 | 1985-09-03 | パイオニア株式会社 | 光学式情報読取装置のサ−ボ装置 |
| JPS573236A (en) * | 1980-06-10 | 1982-01-08 | Olympus Optical Co Ltd | Optical information reader |
| JPS57111837A (en) * | 1980-12-27 | 1982-07-12 | Olympus Optical Co Ltd | Signal detecting system of optical information reader |
| JPS5891538A (ja) * | 1981-11-25 | 1983-05-31 | Hitachi Ltd | 光デイスクトラツク追跡装置 |
| US4564929A (en) * | 1981-11-25 | 1986-01-14 | Hitachi, Ltd. | Information recording and reproducing apparatus with tracking control by sampling |
| NL8105346A (US20110009641A1-20110113-C00116.png) * | 1981-11-26 | 1983-06-16 | ||
| NL8105347A (nl) * | 1981-11-26 | 1983-06-16 | Philips Nv | Inrichting voor het optisch aftasten van een schijfvormige registratiedrager. |
| JPS58125242A (ja) * | 1982-01-22 | 1983-07-26 | Victor Co Of Japan Ltd | 光学的情報信号再生装置のトラツキング誤差検出方式 |
| JPS58150145A (ja) * | 1982-03-03 | 1983-09-06 | Toshiba Corp | 光学式デジタルデイスクプレ−ヤのトラツキング制御回路 |
| JPS58208944A (ja) * | 1982-05-31 | 1983-12-05 | Sony Corp | 光学ヘツド制御信号発生装置 |
| JPS5922242A (ja) * | 1982-07-26 | 1984-02-04 | Foster Denki Kk | 情報再生装置における光学系制御信号検出回路 |
| JPS59110045A (ja) * | 1982-12-13 | 1984-06-25 | Sanyo Electric Co Ltd | 光学式ピツクアツプ装置 |
| JPS59191144A (ja) * | 1983-04-14 | 1984-10-30 | Sony Corp | 光ピツクアツプのトラツキングサ−ボ回路 |
| JPS59198540A (ja) * | 1983-04-26 | 1984-11-10 | Asahi Optical Co Ltd | 光学式デイスクプレ−ヤのトラツキングサ−ボ回路 |
| US4740940A (en) * | 1985-03-11 | 1988-04-26 | Matsushita Electric Industrial Co., Ltd. | Optical information read apparatus |
| JPS61248237A (ja) * | 1985-04-25 | 1986-11-05 | Sankyo Seiki Mfg Co Ltd | トラツキング誤差信号検出方法 |
| JP2796592B2 (ja) * | 1985-10-17 | 1998-09-10 | セイコーインスツルメンツ株式会社 | トラツキングエラー信号発生回路 |
| JP2824573B2 (ja) * | 1985-11-08 | 1998-11-11 | セイコーインスツルメンツ株式会社 | トラツキングエラー信号発生回路 |
| JP2906144B2 (ja) * | 1986-04-09 | 1999-06-14 | セイコーインスツルメンツ株式会社 | 光学ヘツド制御装置 |
| US4958245A (en) * | 1988-04-07 | 1990-09-18 | Insite Peripherals, Inc. | Apparatus and method for optical servo control with media having information storage and servo control regions of different reflectivities |
| DE69507080T2 (de) * | 1994-06-07 | 1999-05-27 | Matsushita Electric Ind Co Ltd | Optisches Informationsaufzeichnungsmedium, optisches Informationsaufzeichnungsverfahren, und optisches Informationswiedergabegerät hierfür |
| TW364992B (en) * | 1996-04-25 | 1999-07-21 | Toshiba Corp | Optic data regeneration apparatus and control method thereof |
| DE19723542A1 (de) | 1997-06-05 | 1998-12-10 | Thomson Brandt Gmbh | Gerät zum Lesen und/oder Beschreiben optischer Aufzeichnungsträger |
| JP3544847B2 (ja) | 1998-01-16 | 2004-07-21 | 三菱電機株式会社 | 光学的情報再生方法および装置 |
| JP4875083B2 (ja) | 2006-11-16 | 2012-02-15 | パナソニック株式会社 | 光学式情報再生装置のトラッキング装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3381086A (en) * | 1962-08-16 | 1968-04-30 | Minnesota Mining & Mfg | Reproduction of television signals from photographic disc recordings |
| FR2235354A1 (en) * | 1973-06-29 | 1975-01-24 | Thomson Csf | Photoelectric optical test sensor - measures displacement of a diffraction screen with constant spacing in the test sensor plane |
-
1976
- 1976-01-28 NL NLAANVRAGE7600842,A patent/NL182258C/xx not_active IP Right Cessation
-
1977
- 1977-01-03 ZA ZA00770011A patent/ZA7711B/xx unknown
- 1977-01-15 DE DE2701539A patent/DE2701539C2/de not_active Expired
- 1977-01-24 MX MX167802A patent/MX143161A/es unknown
- 1977-01-25 SE SE7700725D patent/SE7700725L/xx not_active Application Discontinuation
- 1977-01-25 BR BR7700452A patent/BR7700452A/pt unknown
- 1977-01-25 IT IT19598/77A patent/IT1074335B/it active
- 1977-01-25 CH CH89377A patent/CH613797A5/xx not_active IP Right Cessation
- 1977-01-25 SE SE7700725A patent/SE408238B/xx not_active IP Right Cessation
- 1977-01-25 PL PL1977195541A patent/PL107679B1/pl unknown
- 1977-01-25 NZ NZ183152A patent/NZ183152A/xx unknown
- 1977-01-25 NO NO770240A patent/NO149188C/no unknown
- 1977-01-25 GB GB2943/77A patent/GB1534381A/en not_active Expired
- 1977-01-25 AU AU21616/77A patent/AU505466B2/en not_active Expired
- 1977-01-25 DK DK30777A patent/DK146106C/da not_active IP Right Cessation
- 1977-01-26 ES ES455360A patent/ES455360A1/es not_active Expired
- 1977-01-26 CA CA270,465A patent/CA1094684A/en not_active Expired
- 1977-01-26 JP JP686777A patent/JPS5293222A/ja active Granted
- 1977-01-26 AT AT46077A patent/AT349231B/de not_active IP Right Cessation
- 1977-01-26 BE BE174406A patent/BE850781A/xx unknown
- 1977-01-27 FR FR7702258A patent/FR2339928A1/fr active Granted
- 1977-01-27 AR AR266331A patent/AR211720A1/es active
Also Published As
| Publication number | Publication date |
|---|---|
| CH613797A5 (en) | 1979-10-15 |
| DK146106B (da) | 1983-06-27 |
| ES455360A1 (es) | 1978-01-01 |
| FR2339928A1 (fr) | 1977-08-26 |
| NO770240L (no) | 1977-07-29 |
| ZA7711B (en) | 1978-08-30 |
| SE408238B (sv) | 1979-05-21 |
| JPS5630610B2 (US20110009641A1-20110113-C00116.png) | 1981-07-16 |
| FR2339928B1 (US20110009641A1-20110113-C00116.png) | 1980-03-21 |
| BE850781A (fr) | 1977-07-26 |
| DE2701539C2 (de) | 1981-11-12 |
| DK146106C (da) | 1983-11-21 |
| JPS5293222A (en) | 1977-08-05 |
| NL7600842A (nl) | 1977-08-01 |
| MX143161A (es) | 1981-03-26 |
| NO149188C (no) | 1984-02-29 |
| SE7700725L (sv) | 1977-07-29 |
| NL182258B (nl) | 1987-09-01 |
| NZ183152A (en) | 1980-04-28 |
| NO149188B (no) | 1983-11-21 |
| AR211720A1 (es) | 1978-02-28 |
| GB1534381A (en) | 1978-12-06 |
| ATA46077A (de) | 1978-08-15 |
| NL182258C (nl) | 1988-02-01 |
| DE2701539A1 (de) | 1977-08-04 |
| BR7700452A (pt) | 1977-10-04 |
| CA1094684A (en) | 1981-01-27 |
| PL107679B1 (pl) | 1980-02-29 |
| AT349231B (de) | 1979-03-26 |
| AU505466B2 (en) | 1979-11-22 |
| AU2161677A (en) | 1978-08-03 |
| DK30777A (da) | 1977-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| IT1074335B (it) | Apparecchiatura per la lettura di un supporto di registrazione con una struttura d'informazione atta ad essere letta otticamente | |
| IT1057601B (it) | Dispositivo per la lettura di supporti di registrazione piiatti recanti informazioni in forma leggibile otticamente | |
| BE850782A (fr) | Dispositif pour la lecture d'un support d'enregistrement dans lequel est enregistree de l'information | |
| KR870003475A (ko) | 광학정보기록매체 | |
| IT1119394B (it) | Dispositivo lettore ottico per la lettura di sopporti di registrazione in forma di disco | |
| IT7824501A0 (it) | Testina di lettura/registrazione a sottile pellicola magnetica. | |
| ZA773820B (en) | Optical read unit for scanning a record carrier having a radiation-reflecting information structure | |
| JPS5567948A (en) | Data storing optical disk type recording medium | |
| ES511506A0 (es) | "un aparato para grabar y leer pistas de informacion en una superficie con informacion de un portador de registro". | |
| GB8326825D0 (en) | Optically reading/recording information | |
| GB2084786B (en) | Variable sensitivity optical recording medium and information record | |
| JPS54115203A (en) | Information recording medium | |
| BE835516A (fr) | Dispositif pour la lecture d'un porte-enregistrement presentant une structure d'information optique | |
| IT1165709B (it) | Dispositivo per la lettura di un supporto di registrazione ottica avente una struttura d'informazione atta a riflettere radiazioni | |
| DE3577491D1 (de) | Optisches informationsaufzeichnungsmedium. | |
| IT7968787A0 (it) | Supporto di registrazione con struttura d informazione atta a riflettere le radiazioni e leggibile otticamente particolarmente per segnali televisivi | |
| KR850000975U (ko) | 광학식 기록정보 판독장치 | |
| JPS53136428A (en) | Optical device for recording and reading information on tape | |
| IT8468144A1 (it) | Dispositivo di registrazione e riproduzione di dati su un supporto magnetico. | |
| KR890008770A (ko) | 광정보 기록매체 | |
| FR2418514B1 (fr) | Support d'enregistrement optique de l'information | |
| IT1115947B (it) | Dispositivo e procedimento per l'esplorazione di un supporto in particolare per la scrittura e lettura di dati | |
| DE3276551D1 (en) | Optical type information read/write apparatus | |
| DE3270152D1 (en) | Apparatus for reading an optically readable information structure on a record carrier | |
| JPS55132538A (en) | Recording medium having optical reading information structure |