JPS5794906A - Optical magnetic recorder - Google Patents

Optical magnetic recorder

Info

Publication number
JPS5794906A
JPS5794906A JP17181380A JP17181380A JPS5794906A JP S5794906 A JPS5794906 A JP S5794906A JP 17181380 A JP17181380 A JP 17181380A JP 17181380 A JP17181380 A JP 17181380A JP S5794906 A JPS5794906 A JP S5794906A
Authority
JP
Japan
Prior art keywords
thin film
electromagnet
condenser lens
magnetic field
temperature
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
JP17181380A
Other languages
Japanese (ja)
Inventor
Masaaki Nomura
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP17181380A priority Critical patent/JPS5794906A/en
Publication of JPS5794906A publication Critical patent/JPS5794906A/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

Abstract

PURPOSE:To obtain a writing magnetic field and an erasing magnetic field of sufficient intensity by providing an electromagnet opposite to a condenser lens and a magnetic body, which focuses a magnetic field generated by the electromagnet on a beam-irradiation point on a recording medium, at the condenser lens side. CONSTITUTION:A laser beam LB from a laser device 3 is scanned through a condenser lens 4 to raise the temperature of a magnetic thin film 1 on a recording medium 2 above the Curie temperature or the temperature where its coercive force decreases extremely. When a digital data signal DS is sent during the beam scanning, an AC current generator 5 supplies a positive or negative current to an electromagnet 8 when data is a ''1'' or ''0'', and a magnetic field generated by the electromagnet 8 corresponding to the current is converged by a magnetic body 9 at the side of a condenser lens 4 to be applied to the beam irradiation point of the thin film 1. Then, the direction of the magnetization of the thin film 1 is inverted to record the input data successively on the surface of the thin film 1 as the combination of positive and negative magnetization directions.
JP17181380A 1980-12-05 1980-12-05 Optical magnetic recorder Pending JPS5794906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17181380A JPS5794906A (en) 1980-12-05 1980-12-05 Optical magnetic recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17181380A JPS5794906A (en) 1980-12-05 1980-12-05 Optical magnetic recorder

Publications (1)

Publication Number Publication Date
JPS5794906A true JPS5794906A (en) 1982-06-12

Family

ID=15930198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17181380A Pending JPS5794906A (en) 1980-12-05 1980-12-05 Optical magnetic recorder

Country Status (1)

Country Link
JP (1) JPS5794906A (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6218637A (en) * 1985-07-17 1987-01-27 Matsushita Electric Ind Co Ltd Photomagnetic recording and reproducing device
JPS6262453A (en) * 1985-09-13 1987-03-19 Canon Inc Photomagnetic information device
DE3630691A1 (en) * 1985-09-13 1987-03-26 Canon Kk MAGNETO-OPTICAL INFORMATION RECORDING DEVICE
JPS62119762A (en) * 1985-11-20 1987-06-01 Hitachi Ltd Photomagnetic disk device
EP0230325A2 (en) * 1986-01-23 1987-07-29 Sony Corporation Device for producing a high frequency modulation magnetic field used in magneto-optical recording
US4701894A (en) * 1986-03-28 1987-10-20 Rca Corporation Magnetic biasing apparatus for magneto-optic recording including a magnetic circuit
JPS6320750A (en) * 1986-07-15 1988-01-28 Pioneer Electronic Corp Magneto-optical information recording device
JPS6362934U (en) * 1986-10-13 1988-04-26
JPS644942A (en) * 1987-06-26 1989-01-10 Nec Corp Magneto-optical head
JPS6443820A (en) * 1987-08-11 1989-02-16 Nec Corp Lens actuator
JPH01118249A (en) * 1987-10-30 1989-05-10 Seiko Epson Corp Magneto-optical recording and reproducing device
US4849952A (en) * 1985-09-18 1989-07-18 Canon Kabushiki Kaisha Magnetooptical information recording apparatus having intensified magnetic flux applying means
WO1989008914A1 (en) * 1988-03-10 1989-09-21 Storage Technology Corporation Apparatus for writing data on a magneto-optic recording medium
US4879703A (en) * 1986-07-09 1989-11-07 Hitachi, Ltd. Magneto-optic memory apparatus with defect detection of recording medium during erasing operation
US4959820A (en) * 1986-04-22 1990-09-25 Sony Corporation Magnetooptical recording apparatus with constant leakage magnetic and pulse modulated magnetic field
US4982389A (en) * 1987-01-30 1991-01-01 Hitachi, Ltd. Magneto-optical recorder with compensation for variation in applied magnetic field intensity on a recording medium
US5020041A (en) * 1987-03-06 1991-05-28 Hitachi, Ltd. Magneto-optical memory apparatus having a floating magnetic head
US5105408A (en) * 1988-05-12 1992-04-14 Digital Equipment Corporation Optical head with flying lens
US5124961A (en) * 1989-12-28 1992-06-23 Fuji Xerox Co., Ltd. Floating head for use with a recording apparatus of magneto-optical memory device
US5197050A (en) * 1989-10-06 1993-03-23 Fuji Xerox Co., Ltd. Flying head for a magneto-optical recording drive
US5566147A (en) * 1990-01-18 1996-10-15 Canon Kabushiki Kaisha Magneto-optical recording apparatus and method for modulating the strength of a generated magnetic field into three levels

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6218637A (en) * 1985-07-17 1987-01-27 Matsushita Electric Ind Co Ltd Photomagnetic recording and reproducing device
JPS6262453A (en) * 1985-09-13 1987-03-19 Canon Inc Photomagnetic information device
DE3630691A1 (en) * 1985-09-13 1987-03-26 Canon Kk MAGNETO-OPTICAL INFORMATION RECORDING DEVICE
FR2590065A1 (en) * 1985-09-13 1987-05-15 Canon Kk MAGNETO-OPTICAL INFORMATION RECORDING APPARATUS
US4843600A (en) * 1985-09-13 1989-06-27 Canon Kabushiki Kaisha Recording head for magneto-optical information recording apparatus
US4849952A (en) * 1985-09-18 1989-07-18 Canon Kabushiki Kaisha Magnetooptical information recording apparatus having intensified magnetic flux applying means
US4803674A (en) * 1985-11-20 1989-02-07 Hitachi, Ltd. Magneto-optical recorder with small-sized, low-powered electromagnetic coil
JPS62119762A (en) * 1985-11-20 1987-06-01 Hitachi Ltd Photomagnetic disk device
EP0230325A2 (en) * 1986-01-23 1987-07-29 Sony Corporation Device for producing a high frequency modulation magnetic field used in magneto-optical recording
US4796241A (en) * 1986-01-23 1989-01-03 Sony Corporation Device for producing a high frequency modulation magnetic field used in magneto-optical recording
US4701894A (en) * 1986-03-28 1987-10-20 Rca Corporation Magnetic biasing apparatus for magneto-optic recording including a magnetic circuit
US4959820A (en) * 1986-04-22 1990-09-25 Sony Corporation Magnetooptical recording apparatus with constant leakage magnetic and pulse modulated magnetic field
US4879703A (en) * 1986-07-09 1989-11-07 Hitachi, Ltd. Magneto-optic memory apparatus with defect detection of recording medium during erasing operation
JPS6320750A (en) * 1986-07-15 1988-01-28 Pioneer Electronic Corp Magneto-optical information recording device
JPS6362934U (en) * 1986-10-13 1988-04-26
US4982389A (en) * 1987-01-30 1991-01-01 Hitachi, Ltd. Magneto-optical recorder with compensation for variation in applied magnetic field intensity on a recording medium
US5020041A (en) * 1987-03-06 1991-05-28 Hitachi, Ltd. Magneto-optical memory apparatus having a floating magnetic head
JPS644942A (en) * 1987-06-26 1989-01-10 Nec Corp Magneto-optical head
JPS6443820A (en) * 1987-08-11 1989-02-16 Nec Corp Lens actuator
JPH01118249A (en) * 1987-10-30 1989-05-10 Seiko Epson Corp Magneto-optical recording and reproducing device
WO1989008914A1 (en) * 1988-03-10 1989-09-21 Storage Technology Corporation Apparatus for writing data on a magneto-optic recording medium
US5105408A (en) * 1988-05-12 1992-04-14 Digital Equipment Corporation Optical head with flying lens
US5197050A (en) * 1989-10-06 1993-03-23 Fuji Xerox Co., Ltd. Flying head for a magneto-optical recording drive
US5124961A (en) * 1989-12-28 1992-06-23 Fuji Xerox Co., Ltd. Floating head for use with a recording apparatus of magneto-optical memory device
US5566147A (en) * 1990-01-18 1996-10-15 Canon Kabushiki Kaisha Magneto-optical recording apparatus and method for modulating the strength of a generated magnetic field into three levels

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