DE3879996D1 - Aufnahmekopf fuer magnetooptischen aufzeichnungstraeger. - Google Patents

Aufnahmekopf fuer magnetooptischen aufzeichnungstraeger.

Info

Publication number
DE3879996D1
DE3879996D1 DE8888106320T DE3879996T DE3879996D1 DE 3879996 D1 DE3879996 D1 DE 3879996D1 DE 8888106320 T DE8888106320 T DE 8888106320T DE 3879996 T DE3879996 T DE 3879996T DE 3879996 D1 DE3879996 D1 DE 3879996D1
Authority
DE
Germany
Prior art keywords
magneto
carrier
recording head
recording
optical recording
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
DE8888106320T
Other languages
English (en)
Other versions
DE3879996T2 (de
Inventor
Ltd Sunagawa
Toshiaki Suhara
Hiroshi Nishihara
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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
Priority claimed from JP62096719A external-priority patent/JPH0675310B2/ja
Priority claimed from JP62096718A external-priority patent/JPH0675309B2/ja
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Application granted granted Critical
Publication of DE3879996D1 publication Critical patent/DE3879996D1/de
Publication of DE3879996T2 publication Critical patent/DE3879996T2/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
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G11B11/10545—Heads for reproducing using optical beam of radiation interacting directly with the magnetisation on the record 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
    • 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
DE8888106320T 1987-04-20 1988-04-20 Aufnahmekopf fuer magnetooptischen aufzeichnungstraeger. Expired - Fee Related DE3879996T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62096719A JPH0675310B2 (ja) 1987-04-20 1987-04-20 光磁気記録媒体用ピツクアツプ
JP62096718A JPH0675309B2 (ja) 1987-04-20 1987-04-20 光磁気記録媒体用ピツクアツプ

Publications (2)

Publication Number Publication Date
DE3879996D1 true DE3879996D1 (de) 1993-05-13
DE3879996T2 DE3879996T2 (de) 1993-07-15

Family

ID=26437892

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8888106320T Expired - Fee Related DE3879996T2 (de) 1987-04-20 1988-04-20 Aufnahmekopf fuer magnetooptischen aufzeichnungstraeger.

Country Status (3)

Country Link
US (1) US4868803A (de)
EP (1) EP0288033B1 (de)
DE (1) DE3879996T2 (de)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68921065T2 (de) * 1988-08-05 1995-09-28 Matsushita Electric Ind Co Ltd Optischer kopf.
JPH04137232A (ja) * 1990-09-27 1992-05-12 Sharp Corp 光ピックアップ装置
US5166989A (en) * 1990-11-16 1992-11-24 International Business Machines Corporation Integrated polarization detection system
KR930007024B1 (ko) * 1991-05-13 1993-07-26 삼성전자 주식회사 광픽업
US5258967A (en) * 1992-02-24 1993-11-02 Eastman Kodak Company Method and apparatus for separating a first optical control radiation from a second optical control radiation in a read/write head for use in an optical storage and retrieval system
US5361248A (en) * 1992-06-01 1994-11-01 Eastman Kodak Company Direct overwrite magneto-optical storage medium not requiring an initialization magnet
US5258871A (en) * 1992-06-01 1993-11-02 Eastman Kodak Company Dual diffraction grating beam splitter
JP2960819B2 (ja) * 1992-07-29 1999-10-12 シャープ株式会社 光ピックアップ装置
US5353273A (en) * 1992-08-04 1994-10-04 International Business Machines Corporation Multi-channel optical head and data storage system
US5434708A (en) * 1992-09-08 1995-07-18 Eastman Kodak Company Optical reproducing apparatus ultilizing a polarization beam splitter
US5471548A (en) * 1993-01-15 1995-11-28 Eastman Kodak Company Segmented waveguide gratings used as optical recording sensors
US5453961A (en) * 1993-01-15 1995-09-26 Eastman Kodak Company Pick-up device for optical disk readout using waveguide gratings
US5631885A (en) * 1994-05-02 1997-05-20 Eastman Kodak Company Waveguide-gratings used for analysis of optical beams constructed as dual-pitch double surface corrugations
JP2942718B2 (ja) * 1994-10-05 1999-08-30 富士通株式会社 光学的情報記録再生装置
KR0166232B1 (ko) * 1995-11-27 1999-03-20 배순훈 초소형 광 픽-업장치
KR0166233B1 (ko) * 1995-11-27 1999-03-20 배순훈 초소형 듀얼 포커스 광 픽-업장치
JP3635524B2 (ja) * 1999-02-12 2005-04-06 パイオニア株式会社 光導波路素子及び光ピックアップ
CN1902639A (zh) * 2003-11-10 2007-01-24 科技创新有限责任公司 数字成像组合件及其方法
US7171080B2 (en) * 2004-11-15 2007-01-30 Seagate Technology Llc Coupling grating for focusing light within a waveguide for heat assisted magnetic recording
JP7362727B2 (ja) 2018-05-15 2023-10-17 ライトマター インコーポレイテッド フォトニック処理デバイス及び方法
US11196395B2 (en) 2019-01-16 2021-12-07 Lightmatter, Inc. Optical differential low-noise receivers and related methods
DE102019102614A1 (de) 2019-02-01 2020-08-06 Carl Zeiss Jena Gmbh Bildschirm mit einem transparenten Basiskörper
DE102019102605A1 (de) * 2019-02-01 2020-08-06 Carl Zeiss Jena Gmbh Funktionalisierter Wellenleiter für ein Detektorsystem
DE102019102604A1 (de) * 2019-02-01 2020-08-06 Carl Zeiss Jena Gmbh Funktionalisierter Wellenleiter für ein Detektorsystem
DE102019102608A1 (de) 2019-02-01 2020-08-06 Carl Zeiss Jena Gmbh Funktionalisierter Wellenleiter für ein Detektorsystem
EP3742757B1 (de) * 2019-05-22 2022-12-28 ams International AG Optischer wandler und verfahren zur messung einer verschiebung
JP7579841B2 (ja) 2019-07-29 2024-11-08 ライトマター インコーポレイテッド 線形フォトニックプロセッサを使用したアナログ計算のためのシステム及び方法
WO2021102349A1 (en) 2019-11-22 2021-05-27 Lightmatter Inc. Linear photonic processors and related methods
WO2022020667A1 (en) 2020-07-24 2022-01-27 Lightmatter, Inc. Systems and methods for utilizing photonic degrees of freedom in a photonic processor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877784A (en) * 1973-09-20 1975-04-15 Ibm Beam address optical storage head
US4626679A (en) * 1982-09-22 1986-12-02 Canon Kabushiki Kaisha Optical head and method of detecting the focus thereof
EP0198380B1 (de) * 1985-04-08 1992-07-22 Fuji Photo Film Co., Ltd. Ablese- oder Aufzeichnungsgerät unter Verwendung einer Lichtstrahlabtastvorrichtung

Also Published As

Publication number Publication date
EP0288033B1 (de) 1993-04-07
DE3879996T2 (de) 1993-07-15
EP0288033A3 (en) 1989-10-18
US4868803A (en) 1989-09-19
EP0288033A2 (de) 1988-10-26

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee