KR960008786A - 기록 매체의 광학 기록/판독 시스템 - Google Patents

기록 매체의 광학 기록/판독 시스템 Download PDF

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KR960008786A
KR960008786A KR1019950028872A KR19950028872A KR960008786A KR 960008786 A KR960008786 A KR 960008786A KR 1019950028872 A KR1019950028872 A KR 1019950028872A KR 19950028872 A KR19950028872 A KR 19950028872A KR 960008786 A KR960008786 A KR 960008786A
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recording
diffraction
reading system
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recording medium
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쟝 클로드 러휘로
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아르레뜨 다낭제
똥송-쎄에스에프
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    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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
    • 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
    • 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
    • G11B7/005—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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0065—Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
    • 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
    • G11B7/0903—Multi-beam 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • 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
    • G11B11/10504—Recording
    • 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
    • G11B11/10515—Reproducing
    • 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
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

기록 매체의 광학 기록/판독 시스템으로, 상기 기록 매체상의 뚜렷한 세 포인트에 포커싱되는 세개의 빔을 방출하는 적어도 하나의 광원과, 각 빔에 대한 세개의 회절 차수 -1, 0 및 +1을 정하는 회절 장치를 포함하되, 상기 세개의 빔의 포커싱 포인트가 상기 회절 장치의 회절 방향으로 정렬되며, 서로에 대해 일정 거리를 두어, 0회절 차수의 중앙 빔의 포커싱 포인터에서 -1회절 차수의 한 래터럴(lateral)빔과 +1회절차수의 다른 래터럴 빔이 포커싱된다. 또한, 광학 디스크의 판독에 적용된다.

Description

기록 매체의 광학 기록/판독 시스템
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도 및 제2도는 본 발명의 시스템의 실시예 도시도.
제3도는 본 발명을 선형(linear)기록 매체에 적용한 응용예 도시도.

Claims (18)

  1. 기록 매체의 광학 기록/판독 시스템으로, - 상기 기록 매체상의 뚜렷한 세 포인터에 포커싱되는 세개의 빔을 방출하는 적어도 하나의 광원과; - 각 빔에 대한 세개의 회절 차수(-1, 0 및 +1)를 정하는 회절 장치를 포함하되, 상기 세개의 빔의 포커싱 포인트가 상기 회절 장치의 회절 방향으로 정렬되며, 서로에 대해 일정거리를 두어, 0회절차수의 중앙빔의 포커싱 포인트에서 -1회절 차수의 한 래터럴빔과 +1회절 차수의 다른 래터럴 빔이 포커싱되는 것을 특징으로 하는 기록 매체의 광학 기록/판독 시스템.
  2. 제1항에 있어서, 상기 회절 장치의 회절 방향이 상기 기록 매체가 변이되는 방향에 평행인 것을 특징으로 하는 기록 매체의 광학/판독 시스템.
  3. 제1항에 있어서, 상기 회절 장치의 회절 방향이 상기 기록 매체가 변이되는 방향에 대해 수직인 것을 특징으로 하는 기록 매체의 광학 기록/판독 시스템.
  4. 제1항에 있어서, 상기 회절 장치는 회절 격자인 것을 특징으로 하는 기록 매체의 광학 기록/판독 시스템.
  5. 제2항에 있어서, 상기 회절 격자는 상기 기록 매체의 속도와 동일한 속도로 이동하는 것을 특징으로 하는 기록 매체의 광학 기록/판독 시스템.
  6. 제3항에 있어서, 상기 회절 격자가 판독 빔 또는 기록 매체에 대한 빔의 속도와 동일한 속도를 이동하는 것을 특징으로 하는 기록 매체의 광학 기록/판독 시스템.
  7. 제3항에 있어서, 상기 회절 격자는 상기 기록 매체에 일체화되는 것을 특징으로 하는 기록 매체의 광학 기록/판독 시스템.
  8. 제2항에 있어서, 상기 회절 격자는 선형이며, 상기 지수 라인(index lines)은 기록 매체가 시프트되는 방향에 수직인 것을 특징으로 하는 기록 매체의 광학 기록/판독 시스템.
  9. 제8항에 있어서, 상기 기록 매체는 순환형이며, 상기 기록 트랙이 또한 순환형이며, 라인은 방사상인 것을 특징으로 하는 기록 매체의 광학 기록/판독 시스템.
  10. 제3항에 있어서, 상기 기록 매체는 순환형이며, 또한 기록 트랙도 순환형이고, 라인은 라인에 대한 접선방향을 갖는 것을 특징으로 하는 기록 매체의 광학 기록/판독 시스템.
  11. 제1항에 있어서, 상기 광원은 단일 빔으로부터 세개의 빔을 발생시키는 회절 격자를 포함하는 것을 특징으로 하는 기록 매체의 광학 기록/판독 시스템.
  12. 제11항에 있어서, 상기 회절 격자는 하나의 동일 트랙상에 여러 기록을 행하도록 트랙 방향에 평행하게 시프트되는 것을 특징으로 하는 기록 매체의 광학 기록/판독 시스템.
  13. 제6항에 있어서, 상기 기록 매체는 디스크이며, 그 지수 라인이 상기 디스크상에서 방사상 방향이며 상기 기록 디스크의 트랙에 대해 접선 방향인 회절 격자를 갖는 회절 디스크를 포함하는 것을 특징으로 하는 기록 매체의 광학 기록/판독 시스템.
  14. 상기 디스크의 유용한 기록 표면을 커버하는 적어도 하나의 회절 격자를 포함하는 것을 특징으로 하는 제1항 내지 제13항 중 어느 한 항에 따른 기록 디스크.
  15. 지수 라인이 상기 디스크의 중심에 대해 방사상으로 이루어지는 회절 격자를 포함하는 것을 특징으로 하는 제11항에 따른 시스템에 적용한 기록 디스크.
  16. 지수 라인이 상기 디스크의 중심에 대해 동심원으로 이루어지는 회절 격자를 포함하는 것을 특징으로 하는 제14항에 따른 기록 디스크 시스템.
  17. 광학 또는 자기 광학 기록 및 판독을 행하는 것을 특징으로 하는 제14항에 따른 기록 디스크.
  18. 반사 또는 전송에 의한 작업을 행하는 것을 특징으로 하는 제14항에 따른 기록 디스크.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019950028872A 1994-08-30 1995-08-30 기록매체의광학기록/판독시스템 KR100352737B1 (ko)

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Application Number Priority Date Filing Date Title
FR9410412 1994-08-30
FR9410412A FR2724042B1 (fr) 1994-08-30 1994-08-30 Systeme d'ecriture/lecture optique d'un support d'enregistrement et application a un disque d'enregistrement

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KR960008786A true KR960008786A (ko) 1996-03-22
KR100352737B1 KR100352737B1 (ko) 2002-12-18

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US (1) US5657304A (ko)
EP (1) EP0700038B1 (ko)
JP (1) JPH0877595A (ko)
KR (1) KR100352737B1 (ko)
DE (1) DE69512980T2 (ko)
FR (1) FR2724042B1 (ko)

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JP2684763B2 (ja) * 1989-04-24 1997-12-03 ソニー株式会社 光学記録および／または再生装置
JP3155287B2 (ja) * 1990-05-30 2001-04-09 株式会社リコー 光情報記録再生装置
JPH05101431A (ja) * 1991-10-07 1993-04-23 Sony Corp 光デイスク再生装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030009232A (ko) * 2002-10-17 2003-01-29 홍 용 장 어린이용 승용유희구

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FR2724042B1 (fr) 1997-01-03
FR2724042A1 (fr) 1996-03-01
DE69512980T2 (de) 2000-03-09
EP0700038B1 (fr) 1999-10-27
DE69512980D1 (de) 1999-12-02
JPH0877595A (ja) 1996-03-22
EP0700038A1 (fr) 1996-03-06
US5657304A (en) 1997-08-12
KR100352737B1 (ko) 2002-12-18

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