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JPS5715204A - Photomagnetic recording and reproducing device - Google Patents

Photomagnetic recording and reproducing device

Info

Publication number
JPS5715204A
JPS5715204A JP8895680A JP8895680A JPS5715204A JP S5715204 A JPS5715204 A JP S5715204A JP 8895680 A JP8895680 A JP 8895680A JP 8895680 A JP8895680 A JP 8895680A JP S5715204 A JPS5715204 A JP S5715204A
Authority
JP
Japan
Prior art keywords
light
recording
thin film
field generating
magnetic field
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
JP8895680A
Other languages
Japanese (ja)
Inventor
Toshihisa Deguchi
Kenji Oota
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 JP8895680A priority Critical patent/JPS5715204A/en
Publication of JPS5715204A publication Critical patent/JPS5715204A/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

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To obtain a miniature photomagnetic recording and reproducing device and to use a semiconductor laser device, etc., while reducing electric power required for each light emitting source, by using a photomagnetic recording and reproducing head consisting of vertical magnetic field generating elements and a condensing light beams from light sources. CONSTITUTION:A photomagnetic recording and reproducing head 6 is provided which consists of magnetic field generating elements 15 and 16 capable of applying magnetic fields at right angles to the film surface of a vertical-magnetism thin film 3, a condensing element 10 capable of focusing light beams from light emitting sources 7 and 11 on the same area P on the magnetic thin film 3. In recording information, the light beams and >=1 out of the magnetic field generating element 15 are modulated (e.g. PCM modulation of laser light from light emitting source 11) according to an information signal, and thermomagnetic recording is carried out. To reproduce recorded information, the magnetic thin film 3 is irradiated with >=1 light beam with constant intensity and while magnetooptical effect such as Kerr effect is utilized, a polarizer 8, a half-mirror 9, an analyzer 14, a photodetector 13, etc., for example, are used.
JP8895680A 1980-06-30 1980-06-30 Photomagnetic recording and reproducing device Pending JPS5715204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8895680A JPS5715204A (en) 1980-06-30 1980-06-30 Photomagnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8895680A JPS5715204A (en) 1980-06-30 1980-06-30 Photomagnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS5715204A true JPS5715204A (en) 1982-01-26

Family

ID=13957297

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8895680A Pending JPS5715204A (en) 1980-06-30 1980-06-30 Photomagnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5715204A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6064423U (en) * 1983-10-04 1985-05-07 三洋電機株式会社 Magneto-optical recording/reproducing device
JPH076445A (en) * 1993-12-13 1995-01-10 Canon Inc Magneto-optical recording and reproducing device
JPH076444A (en) * 1993-12-13 1995-01-10 Canon Inc Magneto-optical recording/reproducing device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5197414A (en) * 1975-02-22 1976-08-27
JPS5451804A (en) * 1977-09-30 1979-04-24 Shiyunichi Iwasaki Magnetic recording medium

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5197414A (en) * 1975-02-22 1976-08-27
JPS5451804A (en) * 1977-09-30 1979-04-24 Shiyunichi Iwasaki Magnetic recording medium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6064423U (en) * 1983-10-04 1985-05-07 三洋電機株式会社 Magneto-optical recording/reproducing device
JPH076445A (en) * 1993-12-13 1995-01-10 Canon Inc Magneto-optical recording and reproducing device
JPH076444A (en) * 1993-12-13 1995-01-10 Canon Inc Magneto-optical recording/reproducing device
JP2540012B2 (en) * 1993-12-13 1996-10-02 キヤノン株式会社 Magneto-optical recording / reproducing device

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