ES455360A1 - Apparatus for reading a record carrier with an optically readable information structure - Google Patents

Apparatus for reading a record carrier with an optically readable information structure

Info

Publication number
ES455360A1
ES455360A1 ES455360A ES455360A ES455360A1 ES 455360 A1 ES455360 A1 ES 455360A1 ES 455360 A ES455360 A ES 455360A ES 455360 A ES455360 A ES 455360A ES 455360 A1 ES455360 A1 ES 455360A1
Authority
ES
Spain
Prior art keywords
read
information structure
detection system
reading
reflected
Prior art date
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
Application number
ES455360A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES455360A1 publication Critical patent/ES455360A1/en
Expired legal-status Critical Current

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)

Abstract

The reading-out device is intended to allow centring errors to be detected by means of as small as possible number of additional optical elements. The read-out beam (b) of a helium-neon laser (6) is reflected from a mirror (9) to a system of lens (11). A radiation spot is produced on the surface (2) of the information structure of the recording carrier (1). The read-out beam (b) reflected from the information structure is reflected by a semi-transparent mirror (8) to a radiation-sensitive detection system (12). A deviation between the centre of a read-out spot projected on the information structure and the centre line of this track to be read out is established using the detection system (12). With the aid of the detection system (12), a reference signal is obtained, which is used for correcting the position of the read-out spot with respect to the track to be read out. The detection system (12) is formed by four radiation-sensitive detectors.
ES455360A 1976-01-28 1977-01-26 Apparatus for reading a record carrier with an optically readable information structure Expired ES455360A1 (en)

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
ES455360A1 true ES455360A1 (en) 1978-01-01

Family

ID=19825526

Family Applications (1)

Application Number Title Priority Date Filing Date
ES455360A Expired ES455360A1 (en) 1976-01-28 1977-01-26 Apparatus for reading a record carrier with an optically readable information structure

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) SE7700725L (en)
ZA (1) ZA7711B (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
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
JPS5891538A (en) * 1981-11-25 1983-05-31 Hitachi Ltd Optical disk track tracking device
US4564929A (en) * 1981-11-25 1986-01-14 Hitachi, Ltd. Information recording and reproducing apparatus with tracking control by sampling
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
DE69507080T2 (en) * 1994-06-07 1999-05-27 Matsushita Electric Ind Co Ltd Optical information recording medium, optical information recording method, and optical information reproducing apparatus therefor
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
CH613797A5 (en) 1979-10-15
DK146106B (en) 1983-06-27
FR2339928A1 (en) 1977-08-26
NO770240L (en) 1977-07-29
ZA7711B (en) 1978-08-30
SE408238B (en) 1979-05-21
JPS5630610B2 (en) 1981-07-16
FR2339928B1 (en) 1980-03-21
BE850781A (en) 1977-07-26
DE2701539C2 (en) 1981-11-12
DK146106C (en) 1983-11-21
JPS5293222A (en) 1977-08-05
NL7600842A (en) 1977-08-01
MX143161A (en) 1981-03-26
IT1074335B (en) 1985-04-20
NO149188C (en) 1984-02-29
SE7700725L (en) 1977-07-29
NL182258B (en) 1987-09-01
NZ183152A (en) 1980-04-28
NO149188B (en) 1983-11-21
AR211720A1 (en) 1978-02-28
GB1534381A (en) 1978-12-06
ATA46077A (en) 1978-08-15
NL182258C (en) 1988-02-01
DE2701539A1 (en) 1977-08-04
BR7700452A (en) 1977-10-04
CA1094684A (en) 1981-01-27
PL107679B1 (en) 1980-02-29
AT349231B (en) 1979-03-26
AU505466B2 (en) 1979-11-22
AU2161677A (en) 1978-08-03
DK30777A (en) 1977-07-29

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19981103