JPS5778653A - Laser recording method - Google Patents

Laser recording method

Info

Publication number
JPS5778653A
JPS5778653A JP15185680A JP15185680A JPS5778653A JP S5778653 A JPS5778653 A JP S5778653A JP 15185680 A JP15185680 A JP 15185680A JP 15185680 A JP15185680 A JP 15185680A JP S5778653 A JPS5778653 A JP S5778653A
Authority
JP
Japan
Prior art keywords
recording
thermal magnetic
recording medium
light source
laser
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
JP15185680A
Other languages
Japanese (ja)
Other versions
JPS6214897B2 (en
Inventor
Makoto Nagao
Akira Nahara
Yoshihiro Arai
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP15185680A priority Critical patent/JPS5778653A/en
Publication of JPS5778653A publication Critical patent/JPS5778653A/en
Publication of JPS6214897B2 publication Critical patent/JPS6214897B2/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
    • G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
    • G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties

Abstract

PURPOSE:To execute thermal magnetic recording, and permanent recording by which a recording medium has been deformed physically, by use of one laser light source, by executing the laser irradiation to the thermal magnetic medium, in a low level or a high level. CONSTITUTION:A laser beam 1a emitted from a laser light source 1 is modulated to three stage levels such as high, middle and low by an A/O modulator 2, and its laser beam 1b is irradiated to a thermal magnetic recording medium 4 through a lens system 3. That is to say, the surface of the recording medium 4 is punched and recorded by the beam 1b of a high level, also a magnetic field H is generated by a magnet 5, and when the thermal magnetic recording is executed, the direction of magnetization of the recording medium 4 which has been magnetized uniformly is reversed by the beam 1b of a middle level, and magnetization which is not reversed is executed by the beam 1b of a low level. In this way, thermal magnetic recording and permanent recording are selectively executed by one laser light source, and also three recording systems are selected.
JP15185680A 1980-10-29 1980-10-29 Laser recording method Granted JPS5778653A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15185680A JPS5778653A (en) 1980-10-29 1980-10-29 Laser recording method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15185680A JPS5778653A (en) 1980-10-29 1980-10-29 Laser recording method

Publications (2)

Publication Number Publication Date
JPS5778653A true JPS5778653A (en) 1982-05-17
JPS6214897B2 JPS6214897B2 (en) 1987-04-04

Family

ID=15527746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15185680A Granted JPS5778653A (en) 1980-10-29 1980-10-29 Laser recording method

Country Status (1)

Country Link
JP (1) JPS5778653A (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5971144A (en) * 1982-10-15 1984-04-21 Canon Inc Optical information recording medium
JPS59113506A (en) * 1982-12-21 1984-06-30 Nec Corp System and device for photomagnetic recording, reproducing, and erasing
JPS59113507A (en) * 1982-12-21 1984-06-30 Nec Corp System and device for photomagnetic recording, reproducing, and erasing
JPS59140638A (en) * 1983-01-31 1984-08-13 Canon Inc Information recording method
JPS59178628A (en) * 1983-03-30 1984-10-09 Canon Inc Information recording method
EP0285461A2 (en) * 1987-04-03 1988-10-05 Mitsubishi Denki Kabushiki Kaisha Magneto-optic recording and reproduction apparatus
US4914643A (en) * 1986-11-20 1990-04-03 Ricoh Company, Ltd. Overwriting photomagnetic recording apparatus having single light source and fixed-field generator
JPH02173933A (en) * 1988-12-27 1990-07-05 Toshiba Corp Multiple recording method and multiple recording and reproducing device
US4944037A (en) * 1985-01-18 1990-07-24 Kabushiki Kaisha Toshiba Optical system for recording information in erasable and non-erasable modes
US4985881A (en) * 1983-12-23 1991-01-15 Hitachi, Ltd. Record carrier for a magneto-optical disc memory having guide grooves of a plurality of tracks disposed with a predetermined relation to light spot diameter
US5093817A (en) * 1985-05-31 1992-03-03 Canon Kabushiki Kaisha Method and apparatus for recording information on an opto-magnetic recording medium by applying a modulated light beam while applying a magnetic field alternating with a constant period
US5101385A (en) * 1988-03-14 1992-03-31 Bernoulli Optical Systems Company Magneto-optical information storage system for flexible media having maximum overwrite efficiency
US5126985A (en) * 1987-12-14 1992-06-30 U.S. Philips Corp. Method of recording information on a record carrier of the thermomagnetic type, and device for carrying out the method
US5144602A (en) * 1990-02-01 1992-09-01 Matsushita Electric Industrial Co., Ltd. Magneto-optical information recording method and apparatus in which a laser beam oscillates in a track-width direction
US5163031A (en) * 1988-12-07 1992-11-10 Canon Kabushiki Kaisha Method of recording tetra-value signal on magneto-optical recording medium with plural magnetic layers
JPH0520690A (en) * 1991-12-20 1993-01-29 Canon Inc Phase change recording method
US5247494A (en) * 1984-06-08 1993-09-21 Matsushita Electric Industrial Co. Ltd. Method for recording and reproducing information on and from an optical disk having a read-only recorded zone and a writable and readable zone using a spot laser light
US5265073A (en) * 1987-03-13 1993-11-23 Canon Kabushiki Kaisha Overwritable magneto-optical recording medium having two-layer magnetic films wherein one of the films contains one or more of Cu, Ag, Ti, Mn, B, Pt, Si, Ge, Cr and Al, and a method of recording on the same
US5481410A (en) * 1986-07-08 1996-01-02 Canon Kabushiki Kaisha Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same
US5528564A (en) * 1986-03-07 1996-06-18 Movid Information Technology, Inc. Direct overwrite magneto-optic system for strip erasing and recording elongated domains
US6028824A (en) * 1986-07-08 2000-02-22 Canon Kabushiki Kaisha Magnetooptical recording medium allowing overwriting with two or more magnetic layers

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5971144A (en) * 1982-10-15 1984-04-21 Canon Inc Optical information recording medium
JPS59113506A (en) * 1982-12-21 1984-06-30 Nec Corp System and device for photomagnetic recording, reproducing, and erasing
JPS59113507A (en) * 1982-12-21 1984-06-30 Nec Corp System and device for photomagnetic recording, reproducing, and erasing
JPH0551975B2 (en) * 1982-12-21 1993-08-04 Nippon Electric Co
JPH0550059B2 (en) * 1982-12-21 1993-07-28 Nippon Electric Co
JPS59140638A (en) * 1983-01-31 1984-08-13 Canon Inc Information recording method
JPS59178628A (en) * 1983-03-30 1984-10-09 Canon Inc Information recording method
US5161135A (en) * 1983-12-23 1992-11-03 Hitachi, Ltd. Magneto-optical disc memory apparatus including a header signal and magneto-optical signal level adjusting circuit
US4985881A (en) * 1983-12-23 1991-01-15 Hitachi, Ltd. Record carrier for a magneto-optical disc memory having guide grooves of a plurality of tracks disposed with a predetermined relation to light spot diameter
US5247494A (en) * 1984-06-08 1993-09-21 Matsushita Electric Industrial Co. Ltd. Method for recording and reproducing information on and from an optical disk having a read-only recorded zone and a writable and readable zone using a spot laser light
US4944037A (en) * 1985-01-18 1990-07-24 Kabushiki Kaisha Toshiba Optical system for recording information in erasable and non-erasable modes
US5093817A (en) * 1985-05-31 1992-03-03 Canon Kabushiki Kaisha Method and apparatus for recording information on an opto-magnetic recording medium by applying a modulated light beam while applying a magnetic field alternating with a constant period
US5528564A (en) * 1986-03-07 1996-06-18 Movid Information Technology, Inc. Direct overwrite magneto-optic system for strip erasing and recording elongated domains
US5783300A (en) * 1986-06-18 1998-07-21 Canon Kabushiki Kaisha Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same
US5525378A (en) * 1986-07-08 1996-06-11 Canon Kabushiki Kaisha Method for producing a magnetooptical recording medium
US5481410A (en) * 1986-07-08 1996-01-02 Canon Kabushiki Kaisha Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same
US6028824A (en) * 1986-07-08 2000-02-22 Canon Kabushiki Kaisha Magnetooptical recording medium allowing overwriting with two or more magnetic layers
US4914643A (en) * 1986-11-20 1990-04-03 Ricoh Company, Ltd. Overwriting photomagnetic recording apparatus having single light source and fixed-field generator
US5265073A (en) * 1987-03-13 1993-11-23 Canon Kabushiki Kaisha Overwritable magneto-optical recording medium having two-layer magnetic films wherein one of the films contains one or more of Cu, Ag, Ti, Mn, B, Pt, Si, Ge, Cr and Al, and a method of recording on the same
EP0285461A2 (en) * 1987-04-03 1988-10-05 Mitsubishi Denki Kabushiki Kaisha Magneto-optic recording and reproduction apparatus
US5126985A (en) * 1987-12-14 1992-06-30 U.S. Philips Corp. Method of recording information on a record carrier of the thermomagnetic type, and device for carrying out the method
US5101385A (en) * 1988-03-14 1992-03-31 Bernoulli Optical Systems Company Magneto-optical information storage system for flexible media having maximum overwrite efficiency
US5163031A (en) * 1988-12-07 1992-11-10 Canon Kabushiki Kaisha Method of recording tetra-value signal on magneto-optical recording medium with plural magnetic layers
JPH02173933A (en) * 1988-12-27 1990-07-05 Toshiba Corp Multiple recording method and multiple recording and reproducing device
US5144602A (en) * 1990-02-01 1992-09-01 Matsushita Electric Industrial Co., Ltd. Magneto-optical information recording method and apparatus in which a laser beam oscillates in a track-width direction
JPH0520690A (en) * 1991-12-20 1993-01-29 Canon Inc Phase change recording method

Also Published As

Publication number Publication date
JPS6214897B2 (en) 1987-04-04

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