JPS5730132A - Magnetooptical storage device - Google Patents

Magnetooptical storage device

Info

Publication number
JPS5730132A
JPS5730132A JP10484380A JP10484380A JPS5730132A JP S5730132 A JPS5730132 A JP S5730132A JP 10484380 A JP10484380 A JP 10484380A JP 10484380 A JP10484380 A JP 10484380A JP S5730132 A JPS5730132 A JP S5730132A
Authority
JP
Japan
Prior art keywords
laser light
lens
track
corrected
mirror
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
JP10484380A
Other languages
Japanese (ja)
Inventor
Kenji Oota
Toshihisa Deguchi
Akira Takahashi
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 JP10484380A priority Critical patent/JPS5730132A/en
Publication of JPS5730132A publication Critical patent/JPS5730132A/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
    • G11B11/1055—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
    • 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
    • G11B11/10504—Recording
    • G11B11/10506—Recording by modulating only the light beam of the transducer
    • 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

Abstract

PURPOSE:To erase information by inverting the direction of an established magnetic field while recording information by magnetizing a magnetic recording track in the magnetic field established by an external coil 21 by increasing the temperature of the track above the Curie point by laser light irradiation. CONSTITUTION:Laser light 15 emitted from a laser light source 9 passes through beam splitters 10 and 11 are reflecting mirrors 13 and 14 to form a pair of linear deflected fluxes. Those fluxes are made incident to a magnetooptical storage disk 28 by way of a mirror 18, a lambda/4 plate 19 and a diaphragm lens 20 and, after passing through the disk, made incident to a photodetecting element 24 by way of a condenser lens 22 and an analyzer 23. An information signal is applied to a modulator 12 to control the intensity of the linear polarized light 17, thereby increasing the temperature of a recording track above or below the Curie point. A shift of a spot from the track is corrected by turning the mirror 18 or by moving the diaphragm lens 20 horizontally, and defocusing is corrected by moving the lens at right angles.
JP10484380A 1980-07-29 1980-07-29 Magnetooptical storage device Pending JPS5730132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10484380A JPS5730132A (en) 1980-07-29 1980-07-29 Magnetooptical storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10484380A JPS5730132A (en) 1980-07-29 1980-07-29 Magnetooptical storage device

Publications (1)

Publication Number Publication Date
JPS5730132A true JPS5730132A (en) 1982-02-18

Family

ID=14391612

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10484380A Pending JPS5730132A (en) 1980-07-29 1980-07-29 Magnetooptical storage device

Country Status (1)

Country Link
JP (1) JPS5730132A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57191848A (en) * 1981-05-20 1982-11-25 Matsushita Electric Ind Co Ltd Optical disk recording and reproducing device
JPS62175948A (en) * 1985-06-11 1987-08-01 Nippon Kogaku Kk <Nikon> Overwritable photomagnetic recording method and photomagnetic recording device and medium therefor
US4712203A (en) * 1984-06-13 1987-12-08 Hitachi, Ltd. Method and apparatus for thermo magnetic recording/erasing information with preselected magnetic field switching

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5495250A (en) * 1978-01-11 1979-07-27 Kokusai Denshin Denwa Co Ltd Heat magnetic recording system
JPS54130103A (en) * 1978-03-16 1979-10-09 Philips Nv Device for writing and reading information on recording carrier body and recording carrier body

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5495250A (en) * 1978-01-11 1979-07-27 Kokusai Denshin Denwa Co Ltd Heat magnetic recording system
JPS54130103A (en) * 1978-03-16 1979-10-09 Philips Nv Device for writing and reading information on recording carrier body and recording carrier body

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57191848A (en) * 1981-05-20 1982-11-25 Matsushita Electric Ind Co Ltd Optical disk recording and reproducing device
JPH0459693B2 (en) * 1981-05-20 1992-09-24 Matsushita Electric Ind Co Ltd
US4712203A (en) * 1984-06-13 1987-12-08 Hitachi, Ltd. Method and apparatus for thermo magnetic recording/erasing information with preselected magnetic field switching
JPS62175948A (en) * 1985-06-11 1987-08-01 Nippon Kogaku Kk <Nikon> Overwritable photomagnetic recording method and photomagnetic recording device and medium therefor
JP2521908B2 (en) * 1985-06-11 1996-08-07 株式会社ニコン Overwritable magneto-optical recording method, magneto-optical recording device and magneto-optical recording medium used therefor, modulation method, modulator and magneto-optical recording medium

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