JPS57205840A - Vertical magnetic recording and reproducing device - Google Patents

Vertical magnetic recording and reproducing device

Info

Publication number
JPS57205840A
JPS57205840A JP8926181A JP8926181A JPS57205840A JP S57205840 A JPS57205840 A JP S57205840A JP 8926181 A JP8926181 A JP 8926181A JP 8926181 A JP8926181 A JP 8926181A JP S57205840 A JPS57205840 A JP S57205840A
Authority
JP
Japan
Prior art keywords
luminous flux
optical element
polarized
state
vertical magnetic
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.)
Pending
Application number
JP8926181A
Other languages
Japanese (ja)
Inventor
Kazuya Matsumoto
Kiyonobu Endo
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP8926181A priority Critical patent/JPS57205840A/en
Priority to US06/382,202 priority patent/US4561032A/en
Publication of JPS57205840A publication Critical patent/JPS57205840A/en
Pending 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
    • 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
    • G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
    • G11B11/10536—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording using thermic beams, e.g. lasers

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

PURPOSE:To easily read a recording pattern, and to use in common an optical system of a recording system and a reproducing system, by using a beam splitter having polarization dependability in the reproducing system. CONSTITUTION:A polarization plate 26 is subjected to rotation of the polarized surface against an optical element 23 whose transmitting reflection factor has polarization dependability, in accordance with the magnetizing direction of an area illuminated by a luminous flux (b), due to a Kerr effect, in case when the luminous flux (b) which has passed through the optical element 23 is reflected by a vertical magnetic recording body 24, in a P polarized incident state that the polarizing direction of the luminous flux is parallel with the paper surface. A luminous flux C modulated by the recording body 24 is reflected by the optical element 23, and after that, the polarized state of this luminous flux is varied from a state of the luminous flux C by the reflection factor of the optical element 23. A luminous flux (d) passes through an analyzer 25, and information recorded by a variation of bright and dark patterns is reproduced.
JP8926181A 1981-06-02 1981-06-10 Vertical magnetic recording and reproducing device Pending JPS57205840A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP8926181A JPS57205840A (en) 1981-06-10 1981-06-10 Vertical magnetic recording and reproducing device
US06/382,202 US4561032A (en) 1981-06-02 1982-05-26 Magnetooptic reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8926181A JPS57205840A (en) 1981-06-10 1981-06-10 Vertical magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS57205840A true JPS57205840A (en) 1982-12-17

Family

ID=13965809

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8926181A Pending JPS57205840A (en) 1981-06-02 1981-06-10 Vertical magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS57205840A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5829155A (en) * 1981-08-14 1983-02-21 Olympus Optical Co Ltd Information reproducer by photomagnetic system
JPS58165747U (en) * 1982-04-28 1983-11-04 ティーディーケイ株式会社 magnetic recording readout device
JPS60101745A (en) * 1983-11-08 1985-06-05 Sharp Corp Optical device of photomagnetic storage device
JPS60113347A (en) * 1983-11-24 1985-06-19 Sharp Corp Optical device of photomagnetic memory
JPH03263638A (en) * 1990-03-13 1991-11-25 Fujitsu Ltd Magneto-optical disk device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5744241A (en) * 1980-08-27 1982-03-12 Matsushita Electric Ind Co Ltd Magnetooptic reproducer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5744241A (en) * 1980-08-27 1982-03-12 Matsushita Electric Ind Co Ltd Magnetooptic reproducer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5829155A (en) * 1981-08-14 1983-02-21 Olympus Optical Co Ltd Information reproducer by photomagnetic system
JPH0327977B2 (en) * 1981-08-14 1991-04-17 Olympus Optical Co
JPS58165747U (en) * 1982-04-28 1983-11-04 ティーディーケイ株式会社 magnetic recording readout device
JPH0329781Y2 (en) * 1982-04-28 1991-06-25
JPS60101745A (en) * 1983-11-08 1985-06-05 Sharp Corp Optical device of photomagnetic storage device
JPS60113347A (en) * 1983-11-24 1985-06-19 Sharp Corp Optical device of photomagnetic memory
JPH03263638A (en) * 1990-03-13 1991-11-25 Fujitsu Ltd Magneto-optical disk device
JP2585827B2 (en) * 1990-03-13 1997-02-26 富士通株式会社 Magneto-optical disk drive

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