KR890005686A - 광학 스캐닝장치 - Google Patents

광학 스캐닝장치 Download PDF

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Publication number
KR890005686A
KR890005686A KR1019880012767A KR880012767A KR890005686A KR 890005686 A KR890005686 A KR 890005686A KR 1019880012767 A KR1019880012767 A KR 1019880012767A KR 880012767 A KR880012767 A KR 880012767A KR 890005686 A KR890005686 A KR 890005686A
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KR
South Korea
Prior art keywords
photodetector
recording medium
magneto
optical recording
reflected
Prior art date
Application number
KR1019880012767A
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English (en)
Other versions
KR960016890B1 (ko
Inventor
모리모또 야수아끼
추커 프리트헬름
Original Assignee
롤프-디이터 베르거
도이체 톰손-브란트 게엠베하
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.)
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Application filed by 롤프-디이터 베르거, 도이체 톰손-브란트 게엠베하 filed Critical 롤프-디이터 베르거
Publication of KR890005686A publication Critical patent/KR890005686A/ko
Application granted granted Critical
Publication of KR960016890B1 publication Critical patent/KR960016890B1/ko

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    • 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
    • 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
    • G11B11/10502—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
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • 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

Abstract

내용 없음

Description

광학 스캐닝장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제2도는 본 발명의 실시예를 나타낸 개략도.

Claims (3)

  1. 편파면이 한방향으로 회전하는 주빔은 자기광학 기록매체(6)로부터 제 1 광검출기(11)로 반사되고, 편파면이 반대방향으로 회전하는 주빔은 자기광학기록매체(6)로부터 제 2 광검출기(12)로 반사되며, 제1 및 제 2 광검출기(11,12)의 출력전압의 차이로부터 데이타신호가 형성되고, 하나의 광회절소자를 구비하고 있으며 3빔방식에 따라 자기광학 기록매체(6)를 스캐닝하는 광학스캐닝 장치에 있어서, 제2광검출기(12)에 +1보다 높은 준위 및 -1보다 낮은 준위의 붐도 반사되며, 데이타신호(S)를 발생시키기 위해 제 2 광검출기(12)의 출력전압으로부터 최소한 +1준위 및 -1준위의 빔에 의해 발생된 출력전압이 감산되는 것을 특징으로 하는 광학 스캐닝장치.
  2. 제 1 항에 있어서, 제 3 광검출기(E)를 설치하여 +1준위의 빔이 자기광학기록매체(6)로부터 그것이 반사되도록 하고, 제 4 광검출기(F)를 설치하여 -1 준위의 빔이 자기광학기록매체(6)로부터 그것이 반사되도록하며, 제3 및 제 4 광검출기(E,F)의 출력전압 ES 및 FS의 차이로부터 트래킹 에러신호 RE=ES-FS가 형성되고 제 2광검출기(12)의 출력전압 PS에서 출력전압 ES 및 FS가 감산되게 한 것을 특징으로 하는 광학 스캐닝 장치
  3. 제 2 항에 있어서, 제 5 광검출기(G)를 설치하여 +1보다 높은 준위의 빔이 자기광학기록매체(6)로부터 그것에 반사되도록 하고, 제 6 광검출기(H)를 설치하여 -1보다 낮은 준위의 빔이 자기광학기록매체(6)로부터 그것에 반사되도록 하며, 제5 및 제 6 광검출기(G,H)의 출력전압 GS 및 HS가 제 2 광검출기(12)의 출력전압PS에서 감산되게 한 것을 특징으로 하는 광학 스캐닝 장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019880012767A 1987-09-30 1988-09-30 광학 스캐닝 장치 KR960016890B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3732944.8 1987-09-30
DE19873732944 DE3732944A1 (de) 1987-09-30 1987-09-30 Optische abtastvorrichtung

Publications (2)

Publication Number Publication Date
KR890005686A true KR890005686A (ko) 1989-05-16
KR960016890B1 KR960016890B1 (ko) 1996-12-26

Family

ID=6337224

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880012767A KR960016890B1 (ko) 1987-09-30 1988-09-30 광학 스캐닝 장치

Country Status (10)

Country Link
US (1) US4959821A (ko)
EP (1) EP0309675B1 (ko)
JP (1) JP2907842B2 (ko)
KR (1) KR960016890B1 (ko)
CN (1) CN1012115B (ko)
AT (1) ATE86776T1 (ko)
DE (2) DE3732944A1 (ko)
DK (1) DK547988A (ko)
ES (1) ES2039517T3 (ko)
HU (1) HUT61120A (ko)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5644554A (en) * 1988-01-19 1997-07-01 Hitachi, Ltd. Magnetic head load/unload device, method and a magneto-optical disk apparatus using the same
US5182735A (en) * 1989-03-06 1993-01-26 Eastman Kodak Company Magneto-optic readout apparatus using polarization switching of readout beam
US5235570A (en) * 1989-03-06 1993-08-10 Eastman Kodak Company Magneto-optic readout method and apparatus using polarization switching of readout beam
EP0447265B1 (en) * 1990-03-16 1997-05-21 Canon Kabushiki Kaisha Optical information recording/reproducing apparatus
US5712840A (en) * 1990-03-16 1998-01-27 Canon Kabushiki Kaisha Optical information recording/reproduciing apparatus having two-division detectors
US5119352A (en) * 1990-08-17 1992-06-02 Hewlett-Packard Company Magneto optic data storage read out apparatus and method
DE4026875A1 (de) * 1990-08-25 1992-02-27 Thomson Brandt Gmbh Optische abtastvorrichtung
CN1303588C (zh) * 1991-06-04 2007-03-07 三菱电机株式会社 光学数据存贮介质
DE4205851C2 (de) * 1992-02-26 1995-10-12 Flachglas Ag In die Fensteröffnung einer metallischen Kraftfahrzeugkarosserie einzusetzende Antennenscheibe
JPH05282723A (ja) * 1992-03-31 1993-10-29 Matsushita Electric Ind Co Ltd 光磁気ヘッド装置
EP0582059B1 (en) * 1992-06-02 1998-05-13 Nec Corporation Magneto-optical head assembly
US5349576A (en) * 1992-07-27 1994-09-20 Eastman Kodak Company Apparatus and method for polarization switching of a readout beam in a magneto-optic storage system
DE4226777A1 (de) * 1992-08-13 1994-02-17 Thomson Brandt Gmbh Rauschanteilverringerung im Datensignal und optische Abtastvorrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963040A (ja) * 1982-09-16 1984-04-10 Canon Inc 光磁気情報読取装置
JPS5958637A (ja) * 1982-09-28 1984-04-04 Sony Corp 光学式再生装置
US4691308A (en) * 1984-04-19 1987-09-01 Nippon Kogaku K. K. Apparatus for reproducing information from magnetooptical recording medium

Also Published As

Publication number Publication date
HUT61120A (en) 1992-11-30
DE3732944A1 (de) 1989-04-13
DK547988A (da) 1989-03-31
JP2907842B2 (ja) 1999-06-21
EP0309675B1 (de) 1993-03-10
DK547988D0 (da) 1988-09-30
CN1032599A (zh) 1989-04-26
US4959821A (en) 1990-09-25
JPH01106348A (ja) 1989-04-24
DE3879064D1 (de) 1993-04-15
EP0309675A1 (de) 1989-04-05
KR960016890B1 (ko) 1996-12-26
ES2039517T3 (es) 1993-10-01
CN1012115B (zh) 1991-03-20
ATE86776T1 (de) 1993-03-15

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