FR2339928B1 - - Google Patents
Info
- Publication number
- FR2339928B1 FR2339928B1 FR7702258A FR7702258A FR2339928B1 FR 2339928 B1 FR2339928 B1 FR 2339928B1 FR 7702258 A FR7702258 A FR 7702258A FR 7702258 A FR7702258 A FR 7702258A FR 2339928 B1 FR2339928 B1 FR 2339928B1
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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 (2)
| Publication Number | Publication Date |
|---|---|
| FR2339928A1 FR2339928A1 (fr) | 1977-08-26 |
| FR2339928B1 true FR2339928B1 (xx) | 1980-03-21 |
Family
ID=19825526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7702258A Granted FR2339928A1 (fr) | 1976-01-28 | 1977-01-27 | Dispositif pour la lecture d'un porteur d'enregistrement presentant une structure d'information lisible par voie optique |
Country Status (21)
| Country | Link |
|---|---|
| JP (1) | JPS5293222A (xx) |
| AR (1) | AR211720A1 (xx) |
| AT (1) | AT349231B (xx) |
| AU (1) | AU505466B2 (xx) |
| BE (1) | BE850781A (xx) |
| BR (1) | BR7700452A (xx) |
| CA (1) | CA1094684A (xx) |
| CH (1) | CH613797A5 (xx) |
| DE (1) | DE2701539C2 (xx) |
| DK (1) | DK146106C (xx) |
| ES (1) | ES455360A1 (xx) |
| FR (1) | FR2339928A1 (xx) |
| GB (1) | GB1534381A (xx) |
| IT (1) | IT1074335B (xx) |
| MX (1) | MX143161A (xx) |
| NL (1) | NL182258C (xx) |
| NO (1) | NO149188C (xx) |
| NZ (1) | NZ183152A (xx) |
| PL (1) | PL107679B1 (xx) |
| SE (2) | SE7700725L (xx) |
| ZA (1) | ZA7711B (xx) |
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 |
| NL8204555A (nl) * | 1981-11-25 | 1983-06-16 | Hitachi Ltd | Inrichting voor het registreren en weergeven van informatie. |
| NL8105346A (xx) * | 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 |
| EP0686968B1 (en) | 1994-06-07 | 1999-01-07 | Matsushita Electric Industrial Co., Ltd. | Optical information recording medium, optical information recording method, and optical information reproducing apparatus using the same |
| 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 CH CH89377A patent/CH613797A5/xx not_active IP Right Cessation
- 1977-01-25 NZ NZ183152A patent/NZ183152A/xx unknown
- 1977-01-25 IT IT19598/77A patent/IT1074335B/it active
- 1977-01-25 NO NO770240A patent/NO149188C/no unknown
- 1977-01-25 DK DK30777A patent/DK146106C/da not_active IP Right Cessation
- 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 SE SE7700725D patent/SE7700725L/xx not_active Application Discontinuation
- 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 BR BR7700452A patent/BR7700452A/pt unknown
- 1977-01-26 CA CA270,465A patent/CA1094684A/en not_active Expired
- 1977-01-26 BE BE174406A patent/BE850781A/xx unknown
- 1977-01-26 AT AT46077A patent/AT349231B/de not_active IP Right Cessation
- 1977-01-26 ES ES455360A patent/ES455360A1/es not_active Expired
- 1977-01-26 JP JP686777A patent/JPS5293222A/ja active Granted
- 1977-01-27 AR AR266331A patent/AR211720A1/es active
- 1977-01-27 FR FR7702258A patent/FR2339928A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| PL107679B1 (pl) | 1980-02-29 |
| DK30777A (da) | 1977-07-29 |
| MX143161A (es) | 1981-03-26 |
| DE2701539A1 (de) | 1977-08-04 |
| ZA7711B (en) | 1978-08-30 |
| NL7600842A (nl) | 1977-08-01 |
| ATA46077A (de) | 1978-08-15 |
| IT1074335B (it) | 1985-04-20 |
| DK146106B (da) | 1983-06-27 |
| SE7700725L (sv) | 1977-07-29 |
| NL182258C (nl) | 1988-02-01 |
| AU505466B2 (en) | 1979-11-22 |
| BE850781A (fr) | 1977-07-26 |
| NL182258B (nl) | 1987-09-01 |
| JPS5630610B2 (xx) | 1981-07-16 |
| BR7700452A (pt) | 1977-10-04 |
| AU2161677A (en) | 1978-08-03 |
| CH613797A5 (en) | 1979-10-15 |
| DE2701539C2 (de) | 1981-11-12 |
| NO149188B (no) | 1983-11-21 |
| NZ183152A (en) | 1980-04-28 |
| AR211720A1 (es) | 1978-02-28 |
| FR2339928A1 (fr) | 1977-08-26 |
| CA1094684A (en) | 1981-01-27 |
| NO770240L (no) | 1977-07-29 |
| AT349231B (de) | 1979-03-26 |
| DK146106C (da) | 1983-11-21 |
| SE408238B (sv) | 1979-05-21 |
| GB1534381A (en) | 1978-12-06 |
| JPS5293222A (en) | 1977-08-05 |
| NO149188C (no) | 1984-02-29 |
| ES455360A1 (es) | 1978-01-01 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CD | Change of name or company name | ||
| ST | Notification of lapse |