JPS5979446A - 磁気光学ヘッド - Google Patents

磁気光学ヘッド

Info

Publication number
JPS5979446A
JPS5979446A JP57190337A JP19033782A JPS5979446A JP S5979446 A JPS5979446 A JP S5979446A JP 57190337 A JP57190337 A JP 57190337A JP 19033782 A JP19033782 A JP 19033782A JP S5979446 A JPS5979446 A JP S5979446A
Authority
JP
Japan
Prior art keywords
polarizer
magneto
light
composite
differential
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
JP57190337A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0363139B2 (enrdf_load_stackoverflow
Inventor
Toshihisa Deguchi
出口　敏久
Yoshikazu Fujii
義和 藤居
Tetsuya Inui
哲也 乾
Hideyoshi Yamaoka
山岡　秀嘉
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP57190337A priority Critical patent/JPS5979446A/ja
Publication of JPS5979446A publication Critical patent/JPS5979446A/ja
Publication of JPH0363139B2 publication Critical patent/JPH0363139B2/ja
Granted 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

Landscapes

  • Optical Head (AREA)
JP57190337A 1982-10-28 1982-10-28 磁気光学ヘッド Granted JPS5979446A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57190337A JPS5979446A (ja) 1982-10-28 1982-10-28 磁気光学ヘッド

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57190337A JPS5979446A (ja) 1982-10-28 1982-10-28 磁気光学ヘッド

Publications (2)

Publication Number Publication Date
JPS5979446A true JPS5979446A (ja) 1984-05-08
JPH0363139B2 JPH0363139B2 (enrdf_load_stackoverflow) 1991-09-30

Family

ID=16256510

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57190337A Granted JPS5979446A (ja) 1982-10-28 1982-10-28 磁気光学ヘッド

Country Status (1)

Country Link
JP (1) JPS5979446A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278742A (ja) * 1985-10-02 1987-04-11 Seiko Instr & Electronics Ltd 光情報検出装置
FR2597643A1 (fr) * 1985-11-08 1987-10-23 Seiko Epson Corp Systeme de lecture de signal magneto-optique
JPS63100639A (ja) * 1986-06-02 1988-05-02 Seiko Epson Corp 光磁気信号検出装置
JPH01166350A (ja) * 1987-09-30 1989-06-30 Deutsche Thomson Brandt Gmbh 光学的走査装置
US5161133A (en) * 1989-09-29 1992-11-03 International Business Machines Corporation Magneto-optical storage system
WO1993016469A1 (en) * 1992-02-07 1993-08-19 Sony Corporation Phase varying device, and optical pickup apparatus using the same for magneto-optical storage
US5663940A (en) * 1993-11-19 1997-09-02 Sony Corporation Optical pickup apparatus including hologram element
US5896360A (en) * 1994-11-10 1999-04-20 Sony Corporation Optical pickup device and optical disc driving apparatus having light polarizing hologram

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5788540A (en) * 1980-11-21 1982-06-02 Olympus Optical Co Ltd Method and apparatus for information read-in of optical magnetic recording medium

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5788540A (en) * 1980-11-21 1982-06-02 Olympus Optical Co Ltd Method and apparatus for information read-in of optical magnetic recording medium

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278742A (ja) * 1985-10-02 1987-04-11 Seiko Instr & Electronics Ltd 光情報検出装置
FR2597643A1 (fr) * 1985-11-08 1987-10-23 Seiko Epson Corp Systeme de lecture de signal magneto-optique
US4779250A (en) * 1985-11-08 1988-10-18 Seiko Epson Kabushiki Kaisha Magneto-optical signal read-out system using divided photodetector
JPS63100639A (ja) * 1986-06-02 1988-05-02 Seiko Epson Corp 光磁気信号検出装置
JPH01166350A (ja) * 1987-09-30 1989-06-30 Deutsche Thomson Brandt Gmbh 光学的走査装置
US5161133A (en) * 1989-09-29 1992-11-03 International Business Machines Corporation Magneto-optical storage system
WO1993016469A1 (en) * 1992-02-07 1993-08-19 Sony Corporation Phase varying device, and optical pickup apparatus using the same for magneto-optical storage
US5563869A (en) * 1992-02-07 1996-10-08 Sony Corporation Prism has a plurality of reflective regions each with a predetermined phase difference
US5577018A (en) * 1992-02-07 1996-11-19 Sony Corporation Phase changing apparatus and optical pickup apparatus for magneto-optic storage device using same
US5742577A (en) * 1992-02-07 1998-04-21 Sony Corporation Prism has a plurality of reflective regions each with a predetermined phase difference
US5717667A (en) * 1993-11-11 1998-02-10 Sony Corporation Optical pickup apparatus including an optical rotation device
US5663940A (en) * 1993-11-19 1997-09-02 Sony Corporation Optical pickup apparatus including hologram element
US5896360A (en) * 1994-11-10 1999-04-20 Sony Corporation Optical pickup device and optical disc driving apparatus having light polarizing hologram

Also Published As

Publication number Publication date
JPH0363139B2 (enrdf_load_stackoverflow) 1991-09-30

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