DE3784327T2 - Optisches lesegeraet. - Google Patents

Optisches lesegeraet.

Info

Publication number
DE3784327T2
DE3784327T2 DE8787118575T DE3784327T DE3784327T2 DE 3784327 T2 DE3784327 T2 DE 3784327T2 DE 8787118575 T DE8787118575 T DE 8787118575T DE 3784327 T DE3784327 T DE 3784327T DE 3784327 T2 DE3784327 T2 DE 3784327T2
Authority
DE
Germany
Prior art keywords
light beam
prism element
objective lens
generating source
glass
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 - Fee Related
Application number
DE8787118575T
Other languages
English (en)
Other versions
DE3784327D1 (de
Inventor
Hiroshi Yoshimatsu
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of DE3784327D1 publication Critical patent/DE3784327D1/de
Publication of DE3784327T2 publication Critical patent/DE3784327T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • 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

Landscapes

  • Optical Head (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Holo Graphy (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Polarising Elements (AREA)
DE8787118575T 1986-12-25 1987-12-15 Optisches lesegeraet. Expired - Fee Related DE3784327T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61310484A JPH0777038B2 (ja) 1986-12-25 1986-12-25 光学ピツクアツプ装置

Publications (2)

Publication Number Publication Date
DE3784327D1 DE3784327D1 (de) 1993-04-01
DE3784327T2 true DE3784327T2 (de) 1993-09-09

Family

ID=18005788

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787118575T Expired - Fee Related DE3784327T2 (de) 1986-12-25 1987-12-15 Optisches lesegeraet.

Country Status (6)

Country Link
US (1) US5077723A (de)
EP (1) EP0273295B1 (de)
JP (1) JPH0777038B2 (de)
KR (1) KR960000825B1 (de)
AT (1) ATE86044T1 (de)
DE (1) DE3784327T2 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597249B1 (fr) * 1986-04-11 1988-06-17 Thomson Csf Dispositif de lecture optique de support d'enregistrement optique
JP2982965B2 (ja) * 1989-09-18 1999-11-29 オリンパス光学工業株式会社 光学式読み取り装置
US5272685A (en) * 1989-12-22 1993-12-21 Kabushiki Kaisha Toshiba Optical system for an information processing apparatus
JP2798185B2 (ja) * 1990-07-26 1998-09-17 キヤノン株式会社 光磁気式情報再生装置用光学ヘッド
US5621714A (en) * 1994-02-12 1997-04-15 Olympus Optical Co., Ltd. Optical pick-up apparatus having hologram and beam splitter with birefringent member and polarizing film
US5541906A (en) * 1994-07-29 1996-07-30 Olympus Optical Co., Ltd. Optical head for magneto-optical record medium
JPH08321088A (ja) * 1995-05-25 1996-12-03 Sony Corp 光学ピックアップ
WO1999016061A1 (en) * 1997-09-22 1999-04-01 Seagate Technology, Inc. Apparatus and method for differential wax-wane focusing and push-pull tracking for magneto-optical data storage
JP2003085813A (ja) * 2001-09-07 2003-03-20 Minebea Co Ltd 記録媒体の情報記録及び再生装置
KR102044864B1 (ko) * 2012-12-13 2019-12-06 삼성디스플레이 주식회사 레이저 패터닝 검사장치
RU2660761C2 (ru) * 2013-05-27 2018-07-09 Хуавей Текнолоджиз Ко., Лтд. Устройство контроля длины волны лазера

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH068934B2 (ja) * 1982-01-11 1994-02-02 オリンパス光学工業株式会社 光束合成装置
JPS58221812A (ja) * 1982-06-18 1983-12-23 Hitachi Ltd 自然光生成素子
DE3378140D1 (en) * 1982-07-14 1988-11-03 Fujitsu Ltd Polarizing elements
JPS59167855A (ja) * 1983-03-14 1984-09-21 Canon Inc 情報記録再生装置
US4627688A (en) * 1983-07-01 1986-12-09 Sano Kiko Co., Ltd. Beam splitter
JPS6018833A (ja) * 1983-07-11 1985-01-30 Nippon Kogaku Kk <Nikon> 二波長ビ−ムスプリツタ−を備えた磁気光学記録再生装置
JPS6053863A (ja) * 1983-09-05 1985-03-27 Sony Corp 磁気記録媒体の磁化方向検出装置
JPS6055537A (ja) * 1983-09-06 1985-03-30 Nippon Kogaku Kk <Nikon> 非対称カ−効果を利用する磁気光学再生方法並びにそれに使用する記録媒体及び再生装置
JPH0756710B2 (ja) * 1983-11-24 1995-06-14 シャープ株式会社 光磁気記憶装置の光学装置
JPS60151855A (ja) * 1984-01-20 1985-08-09 Olympus Optical Co Ltd 光磁気ピツクアツプ装置
JPS61177655A (ja) * 1985-01-31 1986-08-09 Olympus Optical Co Ltd 光磁気差動再生装置
JP2592231B2 (ja) * 1985-05-15 1997-03-19 セイコーエプソン株式会社 光学ヘツド
DE3665372D1 (en) * 1985-05-31 1989-10-05 Siemens Ag Optical system for guiding the read-out beam in a magneto-optical memory
JPH0677351B2 (ja) * 1986-11-15 1994-09-28 ソニー株式会社 光学ピツクアツプ装置

Also Published As

Publication number Publication date
JPS63161541A (ja) 1988-07-05
KR960000825B1 (ko) 1996-01-13
EP0273295A2 (de) 1988-07-06
JPH0777038B2 (ja) 1995-08-16
KR880008258A (ko) 1988-08-30
EP0273295B1 (de) 1993-02-24
EP0273295A3 (en) 1990-06-27
DE3784327D1 (de) 1993-04-01
US5077723A (en) 1991-12-31
ATE86044T1 (de) 1993-03-15

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: PATENTANWAELTE MUELLER & HOFFMANN, 81667 MUENCHEN

8339 Ceased/non-payment of the annual fee