IT1074335B - APPARATUS FOR READING A RECORDING MEDIA WITH AN INFORMATION STRUCTURE SUITABLE FOR BEING OPTICALLY READ - Google Patents
APPARATUS FOR READING A RECORDING MEDIA WITH AN INFORMATION STRUCTURE SUITABLE FOR BEING OPTICALLY READInfo
- 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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NLAANVRAGE7600842,A NL182258C (en) | 1976-01-28 | 1976-01-28 | DEVICE FOR READING A FLAT RECORD CARRIER WITH AN OPTICALLY READABLE INFORMATION STRUCTURE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1074335B true IT1074335B (en) | 1985-04-20 |
Family
ID=19825526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT19598/77A IT1074335B (en) | 1976-01-28 | 1977-01-25 | APPARATUS FOR READING A RECORDING MEDIA WITH AN INFORMATION STRUCTURE SUITABLE FOR BEING OPTICALLY READ |
Country Status (21)
| Country | Link |
|---|---|
| JP (1) | JPS5293222A (en) |
| AR (1) | AR211720A1 (en) |
| AT (1) | AT349231B (en) |
| AU (1) | AU505466B2 (en) |
| BE (1) | BE850781A (en) |
| BR (1) | BR7700452A (en) |
| CA (1) | CA1094684A (en) |
| CH (1) | CH613797A5 (en) |
| DE (1) | DE2701539C2 (en) |
| DK (1) | DK146106C (en) |
| ES (1) | ES455360A1 (en) |
| FR (1) | FR2339928A1 (en) |
| GB (1) | GB1534381A (en) |
| IT (1) | IT1074335B (en) |
| MX (1) | MX143161A (en) |
| NL (1) | NL182258C (en) |
| NO (1) | NO149188C (en) |
| NZ (1) | NZ183152A (en) |
| PL (1) | PL107679B1 (en) |
| SE (2) | SE408238B (en) |
| ZA (1) | ZA7711B (en) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6038771B2 (en) * | 1978-06-19 | 1985-09-03 | パイオニア株式会社 | Servo device for optical information reading device |
| 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 |
| NL8204555A (en) * | 1981-11-25 | 1983-06-16 | Hitachi Ltd | DEVICE FOR RECORDING AND DISPLAYING INFORMATION. |
| JPS5891538A (en) * | 1981-11-25 | 1983-05-31 | Hitachi Ltd | Optical disk track tracking device |
| NL8105346A (en) * | 1981-11-26 | 1983-06-16 | ||
| NL8105347A (en) * | 1981-11-26 | 1983-06-16 | Philips Nv | Apparatus for the optical scanning of a disc-shaped record carrier. |
| JPS58125242A (en) * | 1982-01-22 | 1983-07-26 | Victor Co Of Japan Ltd | Tracking error detecting system of optical information signal reproducing device |
| JPS58150145A (en) * | 1982-03-03 | 1983-09-06 | Toshiba Corp | Tracking control circuit of optical digital disc player |
| JPS58208944A (en) * | 1982-05-31 | 1983-12-05 | Sony Corp | Generating device of optical head control signal |
| JPS5922242A (en) * | 1982-07-26 | 1984-02-04 | Foster Denki Kk | Circuit for detecting optical controlling signal in information reproducing device |
| JPS59110045A (en) * | 1982-12-13 | 1984-06-25 | Sanyo Electric Co Ltd | Optical pickup device |
| JPS59191144A (en) * | 1983-04-14 | 1984-10-30 | Sony Corp | Tracking servo circuit of optical pickup |
| JPS59198540A (en) * | 1983-04-26 | 1984-11-10 | Asahi Optical Co Ltd | Tracking servo circuit of optical disc player |
| US4740940A (en) * | 1985-03-11 | 1988-04-26 | Matsushita Electric Industrial Co., Ltd. | Optical information read apparatus |
| JPS61248237A (en) * | 1985-04-25 | 1986-11-05 | Sankyo Seiki Mfg Co Ltd | Detection of tracking error signal |
| JP2796592B2 (en) * | 1985-10-17 | 1998-09-10 | セイコーインスツルメンツ株式会社 | Tracking error signal generation circuit |
| JP2824573B2 (en) * | 1985-11-08 | 1998-11-11 | セイコーインスツルメンツ株式会社 | Tracking error signal generation circuit |
| JP2906144B2 (en) * | 1986-04-09 | 1999-06-14 | セイコーインスツルメンツ株式会社 | Optical head control device |
| 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 |
| CN1054933C (en) | 1994-06-07 | 2000-07-26 | 松下电器产业株式会社 | Optical information recording medium and method, and optical information reproducing apparatus utilizing the same |
| TW364992B (en) * | 1996-04-25 | 1999-07-21 | Toshiba Corp | Optic data regeneration apparatus and control method thereof |
| DE19723542A1 (en) * | 1997-06-05 | 1998-12-10 | Thomson Brandt Gmbh | Device for reading and / or writing to optical recording media |
| JP3544847B2 (en) | 1998-01-16 | 2004-07-21 | 三菱電機株式会社 | Optical information reproducing method and apparatus |
| JP4875083B2 (en) | 2006-11-16 | 2012-02-15 | パナソニック株式会社 | Tracking device for optical information reproducing device |
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/en not_active IP Right Cessation
-
1977
- 1977-01-03 ZA ZA00770011A patent/ZA7711B/en unknown
- 1977-01-15 DE DE2701539A patent/DE2701539C2/en not_active Expired
- 1977-01-24 MX MX167802A patent/MX143161A/en unknown
- 1977-01-25 CH CH89377A patent/CH613797A5/en not_active IP Right Cessation
- 1977-01-25 SE SE7700725A patent/SE408238B/en not_active IP Right Cessation
- 1977-01-25 AU AU21616/77A patent/AU505466B2/en not_active Expired
- 1977-01-25 SE SE7700725D patent/SE7700725L/en not_active Application Discontinuation
- 1977-01-25 NZ NZ183152A patent/NZ183152A/en unknown
- 1977-01-25 PL PL1977195541A patent/PL107679B1/en unknown
- 1977-01-25 BR BR7700452A patent/BR7700452A/en unknown
- 1977-01-25 IT IT19598/77A patent/IT1074335B/en active
- 1977-01-25 NO NO770240A patent/NO149188C/en unknown
- 1977-01-25 DK DK30777A patent/DK146106C/en not_active IP Right Cessation
- 1977-01-25 GB GB2943/77A patent/GB1534381A/en not_active Expired
- 1977-01-26 ES ES455360A patent/ES455360A1/en not_active Expired
- 1977-01-26 CA CA270,465A patent/CA1094684A/en not_active Expired
- 1977-01-26 BE BE174406A patent/BE850781A/en unknown
- 1977-01-26 AT AT46077A patent/AT349231B/en not_active IP Right Cessation
- 1977-01-26 JP JP686777A patent/JPS5293222A/en active Granted
- 1977-01-27 AR AR266331A patent/AR211720A1/en active
- 1977-01-27 FR FR7702258A patent/FR2339928A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| NO149188B (en) | 1983-11-21 |
| SE7700725L (en) | 1977-07-29 |
| JPS5293222A (en) | 1977-08-05 |
| PL107679B1 (en) | 1980-02-29 |
| CA1094684A (en) | 1981-01-27 |
| AR211720A1 (en) | 1978-02-28 |
| NL7600842A (en) | 1977-08-01 |
| NL182258C (en) | 1988-02-01 |
| NZ183152A (en) | 1980-04-28 |
| NO149188C (en) | 1984-02-29 |
| FR2339928B1 (en) | 1980-03-21 |
| JPS5630610B2 (en) | 1981-07-16 |
| BE850781A (en) | 1977-07-26 |
| SE408238B (en) | 1979-05-21 |
| GB1534381A (en) | 1978-12-06 |
| DE2701539C2 (en) | 1981-11-12 |
| AT349231B (en) | 1979-03-26 |
| DK146106C (en) | 1983-11-21 |
| MX143161A (en) | 1981-03-26 |
| AU2161677A (en) | 1978-08-03 |
| DE2701539A1 (en) | 1977-08-04 |
| BR7700452A (en) | 1977-10-04 |
| FR2339928A1 (en) | 1977-08-26 |
| NO770240L (en) | 1977-07-29 |
| ZA7711B (en) | 1978-08-30 |
| ES455360A1 (en) | 1978-01-01 |
| CH613797A5 (en) | 1979-10-15 |
| DK30777A (en) | 1977-07-29 |
| NL182258B (en) | 1987-09-01 |
| AU505466B2 (en) | 1979-11-22 |
| DK146106B (en) | 1983-06-27 |
| ATA46077A (en) | 1978-08-15 |
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