JPS62186228U - - Google Patents

Info

Publication number
JPS62186228U
JPS62186228U JP7080786U JP7080786U JPS62186228U JP S62186228 U JPS62186228 U JP S62186228U JP 7080786 U JP7080786 U JP 7080786U JP 7080786 U JP7080786 U JP 7080786U JP S62186228 U JPS62186228 U JP S62186228U
Authority
JP
Japan
Prior art keywords
magneto
optical
system structure
optical system
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.)
Granted
Application number
JP7080786U
Other languages
English (en)
Other versions
JPH0810854Y2 (ja
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 filed Critical
Priority to JP7080786U priority Critical patent/JPH0810854Y2/ja
Priority to DE19873715443 priority patent/DE3715443C2/de
Priority to FR8706654A priority patent/FR2598521B1/fr
Publication of JPS62186228U publication Critical patent/JPS62186228U/ja
Priority to US07/438,932 priority patent/US5189651A/en
Application granted granted Critical
Publication of JPH0810854Y2 publication Critical patent/JPH0810854Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/16—Beam splitting or combining systems used as aids for focusing
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Optical Recording Or Reproduction (AREA)

Description

【図面の簡単な説明】
第１図は本考案に係る光磁気記録再生装置の光
学系構造の概略構成図で、第２図は他の実施例の
光学系構造の概略構成図、第３図のイ，ロは夫々
上記の光学系構造で使用される非点収差発生検光
子の異なる実施例の斜視図、第４図は従来の光磁
気記録再生装置の光学系構造の概略構成図である
。 ２１……レーザ光源、２２……コリメータ、２
３……ハーフミラー、２４……光磁気デイスク、
２５……対物レンズ、２６……１／２波長板、２
８……非点収差発生検光子、２９Ａ，２９Ｂ……
デイテクタ、３０，３１……差動アンプ。

Claims (1)

  1. 【実用新案登録請求の範囲】 (1) 磁気光学的に信号を読取る光磁気記録再生
    装置において、自動焦点制御信号を検出するため
    の非点収差発生機能と磁気光学的信号を検出する
    ための検光子機能とを１個の非点収差発生検光子
    で構成したことを特徴とする光磁気記録再生装置
    の光学系構造。 (2) 上記の磁気光学的信号を読取りるためのレ
    ーザ光源の偏光方向と、記録トラツクとの方向と
    が平行もしくは直交状態にあり、非点収差発生検
    光子の子午面及び入射面が上記の偏光及びトラツ
    クの各方向に対しほぼ４５°の方向に配向されて
    いることを特徴とする実用新案登録請求の範囲第
    １項記載の光磁気記録再生装置の光学系構造。
JP7080786U 1986-05-12 1986-05-12 光磁気記録媒体再生装置 Expired - Lifetime JPH0810854Y2 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP7080786U JPH0810854Y2 (ja) 1986-05-12 1986-05-12 光磁気記録媒体再生装置
DE19873715443 DE3715443C2 (de) 1986-05-12 1987-05-08 Wiedergabeeinrichtung zum Lesen von Signalen von einem magneto-optischen Aufzeichnungsmedium
FR8706654A FR2598521B1 (fr) 1986-05-12 1987-05-12 Systeme optique d'un dispositif d'enregistrement et de reproduction photo-electro-magnetique.
US07/438,932 US5189651A (en) 1986-05-12 1989-10-30 Optical system in magneto-optical recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7080786U JPH0810854Y2 (ja) 1986-05-12 1986-05-12 光磁気記録媒体再生装置

Publications (2)

Publication Number Publication Date
JPS62186228U true JPS62186228U (ja) 1987-11-26
JPH0810854Y2 JPH0810854Y2 (ja) 1996-03-29

Family

ID=13442201

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7080786U Expired - Lifetime JPH0810854Y2 (ja) 1986-05-12 1986-05-12 光磁気記録媒体再生装置

Country Status (3)

Country Link
JP (1) JPH0810854Y2 (ja)
DE (1) DE3715443C2 (ja)
FR (1) FR2598521B1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6337841A (ja) * 1986-07-31 1988-02-18 Matsushita Electric Ind Co Ltd 光磁気デイスク装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0331476A1 (en) * 1988-03-03 1989-09-06 Canon Kabushiki Kaisha Magneto-optical information reproducing apparatus having a polarizing beam splitter disposed with an inclination of 45
DE69018503T2 (de) * 1989-05-02 1995-08-17 Pioneer Electronic Corp Optischer Kopf.
DE19645110A1 (de) * 1996-11-01 1998-05-07 Thomson Brandt Gmbh Aufzeichnungs- oder Wiedergabegerät und Verfahren zum Erkennen eines Fokussierungszustands

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7907216A (nl) * 1979-09-28 1981-03-31 Philips Nv Optisch fokusfout-detektiestelsel.
JPS57147148A (en) * 1981-03-05 1982-09-10 Olympus Optical Co Ltd Information reproducer with magnetooptic system
DE3429382A1 (de) * 1983-08-10 1985-02-28 Canon K.K., Tokio/Tokyo Optischer kopf
JPS61236035A (ja) * 1985-04-09 1986-10-21 Sony Corp 光学ヘツド

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6337841A (ja) * 1986-07-31 1988-02-18 Matsushita Electric Ind Co Ltd 光磁気デイスク装置

Also Published As

Publication number Publication date
FR2598521A1 (fr) 1987-11-13
FR2598521B1 (fr) 1991-11-08
DE3715443A1 (de) 1987-11-19
JPH0810854Y2 (ja) 1996-03-29
DE3715443C2 (de) 1998-02-26

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